Ersatz MIL-STD-6016

Open-Source Link 16 / TADIL-J J-Series Message Schema Reference

Schema Version 1.0.0 — Generated 2026-03-10

NOTICE: This document is reconstructed entirely from publicly available sources. It is NOT a substitute for MIL-STD-6016 or STANAG 5516. Classified or controlled information has been excluded. Confidence levels indicate reliability of each data element. Use at your own risk for simulation, education, and research purposes only.

1. Coverage Index & Statistics

256

Possible Label.Sublabel IDs
(32 labels × 8 sublabels)

Known Message Types

HIGH Confidence

MEDIUM Confidence

STUB (Name Only)

178

Unknown / Unidentified

Label Coverage Map (0–31)

■ Well-covered ■ Partially covered ■ No coverage

J0
8/8

J1
7/8

J2
6/8

J3
8/8

J4
0/8

J5
1/8

J6
1/8

J7
8/8

J8
2/8

J9
1/8

J10
4/8

J11
3/8

J12
8/8

J13
5/8

J14
2/8

J15
1/8

J16
1/8

J17
1/8

J18
0/8

J19
0/8

J20
0/8

J21
0/8

J22
0/8

J23
0/8

J24
0/8

J25
0/8

J26
0/8

J27
0/8

J28
8/8

J29
0/8

J30
0/8

J31
3/8

Well-covered labels: J0, J1, J2, J3, J31
Partially covered: J5, J6, J7, J8, J9, J10, J11, J12, J13, J14, J15, J16, J17, J28
No coverage: J4, J18, J19, J20, J21, J22, J23, J24, J25, J26, J27, J29, J30 — likely reserved, classified, or national use

2. Physical Layer

Frequency Band

Allocation:	960 – 1215 MHz	(L-band, shared with TACAN/DME)
Operational Range:	969 – 1206 MHz
Center Frequencies:	51	(3 MHz spacing)
Center Frequency:	1,131 MHz
Bandwidth:	240 MHz

Subbands

Subband	Range (MHz)	Description
Lower	969 – 1008	Lower subband
Middle	1053 – 1065	Middle subband
Upper	1113 – 1206	Upper subband

Modulation

Type:	CPSM	(Continuous Phase Shift Modulation)
Chip Modulation:	MSK	(Minimum Shift Keying)
Symbol Encoding:	CCSK	(Cyclic Code Shift Keying, 32-chip symbols)
Chip Rate:	5 Mbps
Chips per Symbol:	32
Bits per Pulse:	5

Pulse Structure

Pulse Duration:	6.4 μs
Guard Time:	6.6 μs
Total Pulse Interval:	13.0 μs
Single Pulse:	6.4 μs burst of CPSM at 5 Mbps
Double Pulse:	26 μs packet (two consecutive pulses)

Frequency Hopping

Hop Rate:	~76,923 hops/sec
Hop Interval:	13 μs	(one hop per pulse interval)
Pattern:	Pseudo-random, determined by net number + TSEC cryptovariable
Enabled Modes:	Mode 1
Disabled Modes:	Modes 2, 4

Error Correction

Type:	Reed-Solomon
Decoding:	Hard Decision Decoding (HDD)
Ratio:	16 bits encoded per 15 bits data

Security

MSEC:	Message Security — link layer encryption of message data
TSEC:	Transmission Security — random message jittering, symbol interleaving, chip scrambling, random frequency hopping

Communication Modes

Mode	Freq. Hopping	Data Encrypted	Description	Confidence
1	Yes	Yes	Normal JTIDS mode	HIGH
2	No	Yes	Narrowband, fixed 969 MHz	HIGH
3	N/A	N/A	Not used	HIGH
4	No	No	No encryption, fixed 969 MHz	HIGH

Transmit Power & Range

Max Power:	200 W
Range:	~300 NM	(line-of-sight)

3. TDMA Structure

Time Slot Duration:	7.8125 ms	(1/128 second)
Slots per Second:	128
Time Frame:	12 seconds	(1,536 slots)
Epoch Duration:	12.8 minutes
Slots per Epoch:	98,304
Interleaved Sets:	A, B, C	(32,768 slots each)
Epochs per Day:	112.5
Stacked Net Numbers:	0 – 127	(7 bits)

Time Slot ID Format (32 bits)

Bits	Width	Field	Range
0–16	17	Time Slot Number	0 – 98,303
17–23	7	Padding	0
24–31	8	Epoch Number	0 – 112

No-statement value: 0xFFFFFFFF (4,294,967,295)

4. Link Layer

Header Word (48 bits)

48 total bits: 35 information + 13 padding. Encoded as a Reed-Solomon code word.

Bit Range	Bits	Field	Description	Confidence
0-2	3	Time Slot Type		HIGH
3	1	Relay Transmission Indicator		HIGH
4-18	15	Source Track Number	STN of the sender (octal)	HIGH
19-34	16	Secure Data Unit Serial Number		HIGH
35-47	13	Padding		HIGH

Message Word (80 bits)

80 total bits: 70 data + 5 parity + 5 padding.

Word Formats

Initial Word (Word Format = 0)

Bit Range	Bits	Field	Value	Description	Confidence
0-1	2	Word Format	0		HIGH
2-6	5	Label	—	Message category (0-31)	HIGH
7-9	3	Sublabel	—	Message subcategory (0-7)	HIGH
10-12	3	Message Length Indicator	—	Number of words in message	HIGH
13-69	57	Message Data	—	Message-specific payload	HIGH
70-74	5	Parity	—		HIGH

Extension Word (Word Format = 2)

Bit Range	Bits	Field	Value	Description	Confidence
0-1	2	Word Format	2		HIGH
2-69	68	Message Data	—	Continuation of message payload	HIGH
70-74	5	Parity	—		HIGH

Continuation Word (Word Format = 1)

Bit Range	Bits	Field	Value	Description	Confidence
0-1	2	Word Format	1		HIGH
2-6	5	Continuation Word Label	—	Identifies continuation word type	HIGH
7-69	63	Message Data	—	Continuation payload	HIGH
70-74	5	Parity	—		HIGH

Packing Modes

Mode	Words/Slot	Data Bits/Slot	Data Rate	Confidence
Standard (STD)	3	210	26.88 kbps	HIGH
Packed-2 (P2)	6	420	53.76 kbps	HIGH
Packed-4 Single Pulse (P4-SP)	12	840	107.52 kbps	HIGH
Packed-4 Double Pulse (P4-DP)	12	N/A	N/A	MEDIUM

Max Throughput: 1,536 words/sec (12 words/slot × 128 slots/second)

5. Simulation Network Header (SISO-STD-002)

The SISO-STD-002 simulation header is a simulation-only construct (not transmitted over the air) that wraps Link 16 messages for distribution over simulation networks (DIS/HLA). Total: 160 bits (20 bytes).

Bit Offset	Bits	Field	Type	Values / Range	Confidence
0	16	NPG Number	uint16	0-511	HIGH
16	8	Net Number	uint8	0-127	HIGH
24	8	TSEC CVLL	uint8	0-127, 255=no statement	HIGH
32	8	MSEC CVLL	uint8	0-127, 255=no statement	HIGH
40	8	Message Type Identifier	enum		HIGH
48	8	SISO-STD-002 Version	enum	0=SISO-STD-002-2006 (byte swapping); 1=SISO-STD-002-2021 (bit stream)	HIGH
56	8	Link 16 Version	enum	0-255	HIGH
64	32	Time Slot ID	uint32		HIGH
96	64	Perceived Transmit Time	NTP timestamp		HIGH

Message Type Identifiers

Value	Name	Description
0	JTIDS Header/Messages	Fixed Word Format J-series messages
1	RTT A/B	Round Trip Timing Addressed/Broadcast
2	RTT Reply	Round Trip Timing Reply
3	JTIDS Voice CVSD	Continuous Variable Slope Delta voice
4	JTIDS Voice LPC10	Linear Predictive Coding 10 voice
5	JTIDS Voice LPC12	Linear Predictive Coding 12 voice
6	JTIDS LET	Link 16 Enhanced Throughput
7	VMF	Variable Message Format

6. Network Participation Groups (NPGs)

NPGs define logical groupings for message distribution. A JTIDS Unit (JU) subscribes to NPGs based on its mission and role. There are 23 known NPGs from open sources.

NPG	Name	Function	Associated Messages	Confidence	Source
1	Initial Entry	Network entry and synchronization	J0.0	HIGH	DSTO-TN-1257 Wireshark dissector, Viasat NPG card
2	RTT-A	Round Trip Timing Addressed - active synchronization with specific terminal	RTT A	HIGH	DSTO-TN-1257 Wireshark dissector
3	RTT-B	Round Trip Timing Broadcast - active synchronization broadcast	RTT B	HIGH	DSTO-TN-1257 Wireshark dissector
4	Network Management	Network management and control messages	J0.x, J1.x	HIGH	DSTO-TN-1257 Wireshark dissector
5	PPLI and Status	Precise Participant Location and Identification	J2.0, J2.2, J2.3, J2.4, J2.5, J2.6	HIGH	DSTO-TN-1257 Wireshark dissector, multiple sources
6	PPLI and Status	Precise Participant Location and Identification (additional)	J2.0, J2.2, J2.3, J2.4, J2.5, J2.6	HIGH	DSTO-TN-1257 Wireshark dissector, multiple sources
7	Surveillance	Track reporting - air, surface, subsurface, land, space, EW products	J3.0, J3.1, J3.2, J3.3, J3.4, J3.5, J3.6, J3.7, J7.0, J7.1, J7.2, J7.3, J7.4, J7.5, J7.6, J7.7	HIGH	Multiple sources
8	Mission Management / Weapons Coordination	Mission management, weapons coordination, and engagement	J8.0, J8.1, J9.0, J10.2, J10.3, J10.5, J10.6, J11.0, J11.1, J11.2, J12.0, J12.1, J12.2, J12.3, J12.4, J12.5, J12.6, J12.7	HIGH	DSTO-TN-1257 Wireshark dissector
9	Control	Air control - used by C2JUs to control non-C2JUs	J12.0, J12.1, J12.2, J12.3, J12.4, J12.5, J12.6, J12.7	HIGH	DSTO-TN-1257 Wireshark dissector, Course Hero
10	Electronic Warfare	Electronic Warfare parametric data and coordination	J14.0, J14.2	HIGH	Multiple sources
11	Image Transfer	Imagery data transfer	J16.0	HIGH	DSTO-TN-1257 Wireshark dissector
12	Voice A	JTIDS voice channel A	N/A	HIGH	DSTO-TN-1257 Wireshark dissector
13	Voice B	JTIDS voice channel B	N/A	HIGH	DSTO-TN-1257 Wireshark dissector
14	Indirect PPLI	Indirect Precise Participant Location and Identification (US Navy usage)	J2.0	MEDIUM	DTIC ADA404334
15	US Army Reserved	Reserved for US Army joint use	N/A	MEDIUM	DTIC ADA404334
16	US Army Reserved	Reserved for US Army joint use	N/A	MEDIUM	DTIC ADA404334
18	Network Enabled Weapons	Weapons control and network-enabled weapons data	J11.0, J11.1, J11.2	HIGH	DSTO-TN-1257 Wireshark dissector
19	Fighter-to-Fighter A	Direct fighter-to-fighter communications channel A	N/A	HIGH	DSTO-TN-1257 Wireshark dissector
20	Fighter-to-Fighter B	Direct fighter-to-fighter communications channel B	N/A	HIGH	DSTO-TN-1257 Wireshark dissector
21	Engagement Coordination	Engagement coordination and deconfliction	J10.2, J10.3, J10.5, J10.6	HIGH	DSTO-TN-1257 Wireshark dissector
25	US Army Reserved	Reserved for US Army joint use	N/A	MEDIUM	DTIC ADA404334
27	Joint Net PPLI	Joint network Precise Participant Location and Identification	J2.0, J2.2, J2.3, J2.4, J2.5, J2.6	HIGH	DSTO-TN-1257 Wireshark dissector
28	Distributed Network Management	Distributed network management functions	J0.x, J1.x	HIGH	DSTO-TN-1257 Wireshark dissector

7. Terminal Types

Terminal	Weight	Platform	Confidence
JTIDS Class 1	250 lbs	Large aircraft (E-3 AWACS)	MEDIUM
JTIDS Class 2	128 lbs	Ground/mobile	MEDIUM
MIDS LVT(1)	42.5 lbs	Fighter aircraft	MEDIUM
MIDS LVT(2) / AN/USQ-140(V)	N/A	Command posts	MEDIUM
MIDS JTRS	50.6 lbs	Multi-waveform capable	MEDIUM

8. Label Categories

Label	Category	Known Messages	Category Confidence
0	Network Management	8	HIGH
1	Network Management	7	HIGH
2	Precise Participant Location and Identification	6	HIGH
3	Surveillance	8	HIGH
4	Reserved/Unknown	0	STUB
5	Anti-Submarine Warfare	1	HIGH
6	Intelligence	1	HIGH
7	Information Management	8	HIGH
8	Information Management	2	HIGH
9	Weapons Coordination and Management	1	HIGH
10	Weapons Coordination and Management	4	HIGH
11	Weapons Coordination and Management	3	HIGH
12	Control	8	HIGH
13	Platform and System Status	5	HIGH
14	Electronic Warfare	2	HIGH
15	Threat Warning	1	HIGH
16	Imagery	1	HIGH
17	Weather	1	HIGH
18	Reserved/Unknown	0	STUB
19	Reserved/Unknown	0	STUB
20	Reserved/Unknown	0	STUB
21	Reserved/Unknown	0	STUB
22	Reserved/Unknown	0	STUB
23	Reserved/Unknown	0	STUB
24	Reserved/Unknown	0	STUB
25	Reserved/Unknown	0	STUB
26	Reserved/Unknown	0	STUB
27	Reserved/Unknown	0	STUB
28	National Use	8	HIGH
29	National Use	0	HIGH
30	National Use	0	HIGH
31	Miscellaneous	3	HIGH

9. Message Schema (J0.x – J31.x)

Search: Confidence: Label: 78 messages shown

Label 0 — Network Management

J0.0 Initial Entry MEDIUM

ID:	J0.0
Functional Name:	Initial Entry
Category:	Network Management
NPG(s):	1, 4, 28
Word Count:	Unknown
Packing Mode:	Standard
Confidence:	MEDIUM
Source:	SISO-STD-002-2021, Wireshark dissector (Viasat card)

Net entry message transmitted by NTR/IEJU. Contains time slot assignments and network synchronization data. Transmitted in pairs, typically every 12 seconds in time slot A-0-6.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Notes: Field-level detail requires MIL-STD-6016. Used for initial and coarse synchronization.

J0.1 Test STUB

ID:	J0.1
Functional Name:	Test
Category:	Network Management
NPG(s):	4
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Network test message.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J0.2 Network Time Update STUB

ID:	J0.2
Functional Name:	Network Time Update
Category:	Network Management
NPG(s):	4
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Provides network time corrections and updates.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J0.3 Time Slot Assignment STUB

ID:	J0.3
Functional Name:	Time Slot Assignment
Category:	Network Management
NPG(s):	4
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Assigns time slots to JUs on the network.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J0.4 Radio Relay Control STUB

ID:	J0.4
Functional Name:	Radio Relay Control
Category:	Network Management
NPG(s):	4
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Controls radio relay operations for beyond-line-of-sight messaging.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J0.5 Repromulgation Relay STUB

ID:	J0.5
Functional Name:	Repromulgation Relay
Category:	Network Management
NPG(s):	4
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Controls repromulgation (retransmission) of messages via relay.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J0.6 Communication Control STUB

ID:	J0.6
Functional Name:	Communication Control
Category:	Network Management
NPG(s):	4
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Communication control and network management directives.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J0.7 Time Slot Reallocation STUB

ID:	J0.7
Functional Name:	Time Slot Reallocation
Category:	Network Management
NPG(s):	4
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Dynamic reallocation of time slots during network operations.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 1 — Network Management

J1.0 Connectivity Interrogation STUB

ID:	J1.0
Functional Name:	Connectivity Interrogation
Category:	Network Management
NPG(s):	4
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Interrogates network connectivity status.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J1.1 Connectivity Status STUB

ID:	J1.1
Functional Name:	Connectivity Status
Category:	Network Management
NPG(s):	4
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports network connectivity status in response to interrogation.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J1.2 Route Establishment STUB

ID:	J1.2
Functional Name:	Route Establishment
Category:	Network Management
NPG(s):	4
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Establishes communication routes through the network.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J1.3 Acknowledgment STUB

ID:	J1.3
Functional Name:	Acknowledgment
Category:	Network Management
NPG(s):	4
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Acknowledgment of received messages.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J1.4 Communication Status STUB

ID:	J1.4
Functional Name:	Communication Status
Category:	Network Management
NPG(s):	4
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports communication system status.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J1.5 Net Control Initialization STUB

ID:	J1.5
Functional Name:	Net Control Initialization
Category:	Network Management
NPG(s):	4
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Initializes net control parameters.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J1.6 Needline Participation Group Assignment STUB

ID:	J1.6
Functional Name:	Needline Participation Group Assignment
Category:	Network Management
NPG(s):	4
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Assigns participation groups based on needline requirements.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 2 — Precise Participant Location and Identification

J2.0 Indirect Interface Unit PPLI MEDIUM

ID:	J2.0
Functional Name:	Indirect Interface Unit PPLI
Category:	Precise Participant Location and Identification
NPG(s):	5, 6, 14, 27
Word Count:	Unknown
Packing Mode:	Standard
Confidence:	MEDIUM
Source:	Wireshark dissector (Viasat card)

PPLI for units connected via indirect interface (e.g., forwarded via gateway).

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J2.2 Air PPLI MEDIUM

ID:	J2.2
Functional Name:	Air PPLI
Category:	Precise Participant Location and Identification
NPG(s):	5, 6, 27
Word Count:	3
Packing Mode:	Standard
Confidence:	MEDIUM
Source:	DSTO-TN-1257, SISO-STD-002-2021 Annex B, Viasat card, ADA404334

Precise Participant Location and Identification for air platforms. Contains voice callsign, geodetic position (lat/lon), altitude, course, IFF codes, air platform type, and network participation status. Transmitted nominally every 12 seconds.

Bit Offset	Bit Width	Field Name	Type	Values / Enumerations	Description	Source	Confidence
0	2	Word Format	enum	0=Initial	Initial word indicator	DSTO-TN-1257	HIGH
2	5	Label	uint	2=PPLI	Message label = 2	DSTO-TN-1257	HIGH
7	3	Sublabel	uint	2=Air	Sublabel = 2 (Air)	DSTO-TN-1257	HIGH
10	3	Message Length Indicator	uint	—	Number of words (typically 2 for 3-word message)	DSTO-TN-1257	HIGH
—	15	Track Number	octal	—	Source Track Number (5-digit octal)	ADA404334, web sources	MEDIUM
—	23	Latitude	signed_fixed	—	Geodetic latitude, WGS-84. Resolution ~0.0039° (~434m)	Web search inference	LOW
—	24	Longitude	signed_fixed	—	Geodetic longitude, WGS-84. Resolution ~0.0039°	Web search inference	LOW
—	—	Altitude	signed_fixed	—	Altitude above mean sea level	Inferred	LOW
—	—	Course	uint	—	Course/heading of platform	ADA404334	LOW
—	—	Speed	uint	—	Platform speed	ADA404334	LOW
—	—	Platform Type	enum	—	Air platform type designation	ADA404334	LOW
—	—	IFF/SIF Codes	bitfield	—	IFF/SIF transponder codes	ADA404334	LOW
—	—	Voice Callsign	alphanumeric	—	Voice callsign of platform	ADA404334	LOW

Notes: This is the most commonly observed message type. The 3-word structure (Initial + Extension + Continuation) is confirmed by the SISO-STD-002 Annex B example. Exact bit offsets for payload fields require MIL-STD-6016.

J2.3 Surface PPLI MEDIUM

ID:	J2.3
Functional Name:	Surface PPLI
Category:	Precise Participant Location and Identification
NPG(s):	5, 6, 27
Word Count:	3
Packing Mode:	Standard
Confidence:	MEDIUM
Source:	Wireshark dissector (Viasat card), ADA404334

PPLI for surface (maritime) platforms. Contains position, course, speed, and identification data.

Bit Offset	Bit Width	Field Name	Type	Values / Enumerations	Description	Confidence
0	2	Word Format	enum	—	Initial word indicator	HIGH
2	5	Label	uint	—	Label = 2	HIGH
7	3	Sublabel	uint	—	Sublabel = 3 (Surface)	HIGH
10	3	Message Length Indicator	uint	—		HIGH
—	—	Latitude	signed_fixed	—		LOW
—	—	Longitude	signed_fixed	—		LOW
—	—	Course	uint	—		LOW
—	—	Speed	uint	—		LOW

J2.4 Subsurface PPLI STUB

ID:	J2.4
Functional Name:	Subsurface PPLI
Category:	Precise Participant Location and Identification
NPG(s):	5, 6, 27
Word Count:	Unknown
Packing Mode:	Standard
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

PPLI for subsurface (submarine) platforms.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J2.5 Land Point PPLI STUB

ID:	J2.5
Functional Name:	Land Point PPLI
Category:	Precise Participant Location and Identification
NPG(s):	5, 6, 27
Word Count:	Unknown
Packing Mode:	Standard
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

PPLI for fixed land-based platforms (e.g., command posts, radar sites).

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J2.6 Land Track PPLI STUB

ID:	J2.6
Functional Name:	Land Track PPLI
Category:	Precise Participant Location and Identification
NPG(s):	5, 6, 27
Word Count:	Unknown
Packing Mode:	Standard
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

PPLI for mobile land-based platforms (e.g., ground vehicles).

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 3 — Surveillance

J3.0 Reference Point STUB

ID:	J3.0
Functional Name:	Reference Point
Category:	Surveillance
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports a reference point (e.g., datum, waypoint, or fixed geographic reference).

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J3.1 Emergency Point STUB

ID:	J3.1
Functional Name:	Emergency Point
Category:	Surveillance
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports an emergency point (e.g., downed aircraft, distress signal).

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J3.2 Air Track MEDIUM

ID:	J3.2
Functional Name:	Air Track
Category:	Surveillance
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	MEDIUM
Source:	Wireshark dissector (Viasat card), ADA404334, ADS-B gateway doc, Falcon BMS

Reports an air surveillance track. Contains track number, position (lat/lon/altitude), speed, course, identity (pending/unknown/friend/neutral/suspect/hostile), platform type, specific type, nationality, strength, and track quality.

Bit Offset	Bit Width	Field Name	Type	Values / Enumerations	Description	Source	Confidence
0	2	Word Format	enum	—			HIGH
2	5	Label	uint	—	Label = 3		HIGH
7	3	Sublabel	uint	—	Sublabel = 2 (Air Track)		HIGH
—	15	Track Number	octal	—	Track number (5-digit octal)		MEDIUM
—	—	Identity	enum	Pending, Unknown, Assumed Friend, Friend, Neutral, Suspect, Hostile (partial)	Track identity/IFF status (enumeration INCOMPLETE)	ADA404334, Falcon BMS Forum	MEDIUM
—	—	Latitude	signed_fixed	—	Track latitude		LOW
—	—	Longitude	signed_fixed	—	Track longitude		LOW
—	—	Altitude	signed_fixed	—	Track altitude		LOW
—	—	Speed	uint	—	Track speed		LOW
—	—	Course	uint	—	Track course/heading		LOW
—	—	Strength	uint	—	Formation strength (defaults to 1 if unspecified)		LOW
—	—	Platform Type	enum	—	Air platform type (fighter, bomber, etc.)		LOW
—	—	Specific Type	enum	—	Specific platform designation (F-15, MiG-29, etc.)		LOW

Notes: Most commonly used surveillance message. Similar fields to ADS-B. Exact bit positions require MIL-STD-6016.

J3.3 Surface Track STUB

ID:	J3.3
Functional Name:	Surface Track
Category:	Surveillance
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports a surface (maritime) surveillance track. Contains position, course, speed, identity, and vessel type.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J3.4 Subsurface Track STUB

ID:	J3.4
Functional Name:	Subsurface Track
Category:	Surveillance
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports a subsurface (submarine) surveillance track.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J3.5 Land Point or Track STUB

ID:	J3.5
Functional Name:	Land Point or Track
Category:	Surveillance
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports a land point or land mobile track.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J3.6 Space Track STUB

ID:	J3.6
Functional Name:	Space Track
Category:	Surveillance
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports a space surveillance track (satellite, missile, etc.).

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J3.7 Electronic Warfare Product Information STUB

ID:	J3.7
Functional Name:	Electronic Warfare Product Information
Category:	Surveillance
NPG(s):	7, 10
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports electronic warfare product information associated with surveillance tracks.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 5 — Anti-Submarine Warfare

J5.4 Acoustic Bearing and Range STUB

ID:	J5.4
Functional Name:	Acoustic Bearing and Range
Category:	Anti-Submarine Warfare
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports acoustic bearing and range data for ASW operations.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 6 — Intelligence

J6.0 Amplification STUB

ID:	J6.0
Functional Name:	Amplification
Category:	Intelligence
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Provides amplifying intelligence information for tracks or events.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 7 — Information Management

J7.0 Track Management STUB

ID:	J7.0
Functional Name:	Track Management
Category:	Information Management
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Manages track data including track drops, updates, and transfers.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J7.1 Data Update Request STUB

ID:	J7.1
Functional Name:	Data Update Request
Category:	Information Management
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Requests updated data for specified tracks.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J7.2 Correlation STUB

ID:	J7.2
Functional Name:	Correlation
Category:	Information Management
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Correlates tracks from multiple sources to establish unified track picture.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J7.3 Pointer STUB

ID:	J7.3
Functional Name:	Pointer
Category:	Information Management
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Points to related tracks or data.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J7.4 Track Identifier STUB

ID:	J7.4
Functional Name:	Track Identifier
Category:	Information Management
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Provides track identification data.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J7.5 IFF/SIF Management STUB

ID:	J7.5
Functional Name:	IFF/SIF Management
Category:	Information Management
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Manages IFF/SIF transponder code assignments.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J7.6 Filter Management STUB

ID:	J7.6
Functional Name:	Filter Management
Category:	Information Management
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Manages data filtering criteria for track distribution.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J7.7 Association STUB

ID:	J7.7
Functional Name:	Association
Category:	Information Management
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Associates related tracks or entities.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 8 — Information Management

J8.0 Unit Designator STUB

ID:	J8.0
Functional Name:	Unit Designator
Category:	Information Management
NPG(s):	8
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Designates a unit for mission assignment or tasking.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J8.1 Mission Correlator Change STUB

ID:	J8.1
Functional Name:	Mission Correlator Change
Category:	Information Management
NPG(s):	8
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Changes mission correlator assignments.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 9 — Weapons Coordination and Management

J9.0 Command STUB

ID:	J9.0
Functional Name:	Command
Category:	Weapons Coordination and Management
NPG(s):	8
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Issues commands for weapons engagement and management.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 10 — Weapons Coordination and Management

J10.2 Engagement Status STUB

ID:	J10.2
Functional Name:	Engagement Status
Category:	Weapons Coordination and Management
NPG(s):	8, 21
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports engagement status between weapons platforms and targets.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J10.3 Handover STUB

ID:	J10.3
Functional Name:	Handover
Category:	Weapons Coordination and Management
NPG(s):	8, 21
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Transfers engagement responsibility from one platform to another.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J10.5 Controlling Unit Report STUB

ID:	J10.5
Functional Name:	Controlling Unit Report
Category:	Weapons Coordination and Management
NPG(s):	8, 21
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports from the controlling unit on engagement status.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J10.6 Pairing STUB

ID:	J10.6
Functional Name:	Pairing
Category:	Weapons Coordination and Management
NPG(s):	8, 21
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Pairs weapons platforms with targets for engagement.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 11 — Weapons Coordination and Management

J11.0 From the Weapon STUB

ID:	J11.0
Functional Name:	From the Weapon
Category:	Weapons Coordination and Management
NPG(s):	8, 18
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Status reports from a weapon in flight to the controlling platform.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J11.1 To the Weapon STUB

ID:	J11.1
Functional Name:	To the Weapon
Category:	Weapons Coordination and Management
NPG(s):	8, 18
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Commands and updates sent to a weapon in flight.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J11.2 Weapon Coordination STUB

ID:	J11.2
Functional Name:	Weapon Coordination
Category:	Weapons Coordination and Management
NPG(s):	8, 18
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Coordinates weapons employment between platforms.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 12 — Control

J12.0 Mission Assignment STUB

ID:	J12.0
Functional Name:	Mission Assignment
Category:	Control
NPG(s):	8, 9
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Assigns missions (engagement, reconnaissance, etc.) to controlled units.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J12.1 Vector STUB

ID:	J12.1
Functional Name:	Vector
Category:	Control
NPG(s):	8, 9
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Provides steering vectors to controlled aircraft.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J12.2 Precision Aircraft Direction STUB

ID:	J12.2
Functional Name:	Precision Aircraft Direction
Category:	Control
NPG(s):	8, 9
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Provides precise aircraft direction for intercept.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J12.3 Flight Path STUB

ID:	J12.3
Functional Name:	Flight Path
Category:	Control
NPG(s):	8, 9
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Defines a flight path for controlled aircraft.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J12.4 Controlling Unit Change STUB

ID:	J12.4
Functional Name:	Controlling Unit Change
Category:	Control
NPG(s):	8, 9
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Transfers control of a unit from one controller to another.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J12.5 Target/Track Correlation STUB

ID:	J12.5
Functional Name:	Target/Track Correlation
Category:	Control
NPG(s):	8, 9
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Correlates targets and tracks for engagement.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J12.6 Target Sorting STUB

ID:	J12.6
Functional Name:	Target Sorting
Category:	Control
NPG(s):	8, 9
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Sorts and prioritizes targets for engagement.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J12.7 Target Bearing STUB

ID:	J12.7
Functional Name:	Target Bearing
Category:	Control
NPG(s):	8, 9
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports target bearing data.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 13 — Platform and System Status

J13.0 Airfield Status STUB

ID:	J13.0
Functional Name:	Airfield Status
Category:	Platform and System Status
NPG(s):	7, 8
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports airfield operational status.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J13.2 Air Platform and System Status STUB

ID:	J13.2
Functional Name:	Air Platform and System Status
Category:	Platform and System Status
NPG(s):	7, 8
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports detailed platform and weapons system status for air platforms.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J13.3 Surface Platform and System Status STUB

ID:	J13.3
Functional Name:	Surface Platform and System Status
Category:	Platform and System Status
NPG(s):	7, 8
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports detailed platform and weapons system status for surface platforms.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J13.4 Subsurface Platform and System Status STUB

ID:	J13.4
Functional Name:	Subsurface Platform and System Status
Category:	Platform and System Status
NPG(s):	7, 8
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports platform and weapons system status for subsurface platforms.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J13.5 Land Platform and System Status STUB

ID:	J13.5
Functional Name:	Land Platform and System Status
Category:	Platform and System Status
NPG(s):	7, 8
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports platform and weapons system status for land platforms.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 14 — Electronic Warfare

J14.0 Parametric Information STUB

ID:	J14.0
Functional Name:	Parametric Information
Category:	Electronic Warfare
NPG(s):	10
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports electronic warfare parametric data (emitter characteristics, signal parameters).

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J14.2 Electronic Warfare Control / Coordination STUB

ID:	J14.2
Functional Name:	Electronic Warfare Control / Coordination
Category:	Electronic Warfare
NPG(s):	10
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Coordinates electronic warfare operations and countermeasures.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 15 — Threat Warning

J15.0 Threat Warning STUB

ID:	J15.0
Functional Name:	Threat Warning
Category:	Threat Warning
NPG(s):	7, 8
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Issues threat warnings for incoming threats.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 16 — Imagery

J16.0 Imagery STUB

ID:	J16.0
Functional Name:	Imagery
Category:	Imagery
NPG(s):	11
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Transfers imagery data.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 17 — Weather

J17.0 Weather Over Target STUB

ID:	J17.0
Functional Name:	Weather Over Target
Category:	Weather
NPG(s):	7
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Reports weather conditions over a target area.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 28 — National Use

J28.0 U.S. National 1 (Army) STUB

ID:	J28.0
Functional Name:	U.S. National 1 (Army)
Category:	National Use
NPG(s):	N/A
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

U.S. Army national use message.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J28.1 U.S. National 2 (Navy) STUB

ID:	J28.1
Functional Name:	U.S. National 2 (Navy)
Category:	National Use
NPG(s):	N/A
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

U.S. Navy national use message.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J28.2 U.S. National 3 (Air Force) MEDIUM

ID:	J28.2
Functional Name:	U.S. National 3 (Air Force)
Category:	National Use
NPG(s):	N/A
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	MEDIUM
Source:	Wireshark dissector (Viasat card), SISO-STD-002-2021

U.S. Air Force national use message. Also used for free text messaging.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J28.3 U.S. National 4 (Marine Corps) STUB

ID:	J28.3
Functional Name:	U.S. National 4 (Marine Corps)
Category:	National Use
NPG(s):	N/A
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

U.S. Marine Corps national use message.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J28.4 French National 1 STUB

ID:	J28.4
Functional Name:	French National 1
Category:	National Use
NPG(s):	N/A
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

French national use message 1.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J28.5 French National 2 STUB

ID:	J28.5
Functional Name:	French National 2
Category:	National Use
NPG(s):	N/A
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

French national use message 2.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J28.6 U.S. National 5 (NSA) STUB

ID:	J28.6
Functional Name:	U.S. National 5 (NSA)
Category:	National Use
NPG(s):	N/A
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

NSA national use message.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J28.7 UK National STUB

ID:	J28.7
Functional Name:	UK National
Category:	National Use
NPG(s):	N/A
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

United Kingdom national use message.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

Label 31 — Miscellaneous

J31.0 Over-the-Air Rekeying Management STUB

ID:	J31.0
Functional Name:	Over-the-Air Rekeying Management
Category:	Miscellaneous
NPG(s):	N/A
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Manages over-the-air cryptographic rekeying operations.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J31.1 Over-the-Air Rekeying STUB

ID:	J31.1
Functional Name:	Over-the-Air Rekeying
Category:	Miscellaneous
NPG(s):	N/A
Word Count:	Unknown
Packing Mode:	Unknown
Confidence:	STUB
Source:	Wireshark dissector (Viasat card)

Performs the actual over-the-air rekeying of cryptographic variables.

Field-level detail requires MIL-STD-6016 / STANAG 5516.

J31.7 No Statement HIGH

ID:	J31.7
Functional Name:	No Statement
Category:	Miscellaneous
NPG(s):	N/A
Word Count:	1
Packing Mode:	Unknown
Confidence:	HIGH
Source:	SISO-STD-002-2021 §4.1.1, Wireshark dissector (Viasat card)

A 1-word message used to pad time slots to 3, 6, or 12 words. Contains no tactical information.

Bit Offset	Bit Width	Field Name	Type	Values / Enumerations	Description	Confidence
0	2	Word Format	enum	0=Initial		HIGH
2	5	Label	uint	31=Miscellaneous		HIGH
7	3	Sublabel	uint	7=No Statement		HIGH
10	3	MLI	uint	0=1 word		HIGH
13	57	Padding	padding	—	Set to all zeros or ignored	MEDIUM

10. Gaps and Limitations

This schema is reconstructed from open sources and has significant gaps. The following limitations should be understood by any user of this data:

Of 256 possible label.sublabel combinations, only 78 are identified from open sources (30% coverage).
Labels 4, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 30 have NO known message types — likely reserved, classified, or national use.
Field-level detail (bit offsets within payload) for most messages requires access to MIL-STD-6016 / STANAG 5516. Only J2.2 (Air PPLI), J2.3 (Surface PPLI), J3.2 (Air Track), and J31.7 (No Statement) have partial field detail.
Latitude/longitude encoding resolution (~23/24 bits) is inferred, not confirmed from primary sources.
DFI/DUI (Data Field Identifier / Data Use Identifier) mapping is entirely absent from open sources.
Reed-Solomon encoding parameters (exact generator polynomial, symbol size) are not publicly documented.
Packing mode assignments per message type are not documented in open literature.
Machine receipt procedures and detailed issuance rules are not available.
Platform type enumerations, specific type codes, and nationality codes are not available.

Most Productive Research Targets

MIL-STD-6016 (if declassified portions exist)
Wireshark dissector evolution on GitLab
DCS World / Falcon BMS simulation implementations
JREAP (Joint Range Extension Applications Protocol) analysis
Patent filings related to Link 16 terminal implementations

11. Sources & Citations

SISO-STD-002-2021 — Standard for Link 16 Simulation Version 2.0
https://cdn.ymaws.com/www.sisostandards.org/resource/resmgr/standards_products/siso-std-002-2021_link_16.pdf
DSTO-TN-1257 — Extending the Wireshark Network Protocol Analyser to Support Link 16
https://willrobertson.id.au/resources/wireshark/DSTO-TN-1257.pdf
CJCSM 6520.01B — CJCS Manual for Link 16
https://www.jcs.mil/Portals/36/Documents/Doctrine/training/jid/cjcsm6520.01b_link16.pdf
DTIC ADA404334 — TADIL J Introduction
https://apps.dtic.mil/sti/pdfs/ADA404334.pdf
Wireshark Link 16 dissector source code
https://github.com/wireshark/wireshark/blob/master/epan/dissectors/packet-link16.c
Viasat Link 16 NPG and Message Card
Referenced in Wireshark dissector; original URL defunct.
Signal Identification Wiki — Link 16
https://www.sigidwiki.com/wiki/Link_16
Stinson, C.W. — "Internet Protocol (IP) Over Link-16", AFIT Thesis
https://scholar.afit.edu/cgi/viewcontent.cgi?article=5198&context=etd
Robertson, W., Ross, P. — "Open Source Analyzer for SISO-J Tactical Data Link Simulation", SimTecT 2010
http://pross.sdf.org/simtect2010-64.pdf
Wikipedia — Link 16
https://en.wikipedia.org/wiki/Link_16
Wikipedia — TADIL-J
https://en.wikipedia.org/wiki/TADIL-J

Ersatz MIL-STD-6016

Table of Contents

Quick Message Navigation

1. Coverage Index & Statistics

Label Coverage Map (0–31)

2. Physical Layer

Frequency Band

Subbands

Modulation

Pulse Structure

Frequency Hopping

Error Correction

Security

Communication Modes

Transmit Power & Range

3. TDMA Structure

Time Slot ID Format (32 bits)

4. Link Layer

Header Word (48 bits)

Message Word (80 bits)

Word Formats

Initial Word (Word Format = 0)

Extension Word (Word Format = 2)

Continuation Word (Word Format = 1)

Packing Modes

5. Simulation Network Header (SISO-STD-002)

Message Type Identifiers

6. Network Participation Groups (NPGs)

7. Terminal Types

8. Label Categories

9. Message Schema (J0.x – J31.x)

Label 0 — Network Management

Label 1 — Network Management

Label 2 — Precise Participant Location and Identification

Label 3 — Surveillance

Label 5 — Anti-Submarine Warfare

Label 6 — Intelligence

Label 7 — Information Management

Label 8 — Information Management

Label 9 — Weapons Coordination and Management

Label 10 — Weapons Coordination and Management

Label 11 — Weapons Coordination and Management

Label 12 — Control

Label 13 — Platform and System Status

Label 14 — Electronic Warfare

Label 15 — Threat Warning

Label 16 — Imagery

Label 17 — Weather

Label 28 — National Use

Label 31 — Miscellaneous

10. Gaps and Limitations

Most Productive Research Targets

11. Sources & Citations