16: Satellite Data

Header

Field	Name	Description	Type
5	Method	Request a service to be perform an action Possible values: 1: SET— Set one or more values that are provided in the message payload. 2: GET— Get values for the associated message type. 3: SUBSCRIBE— Subscribe to values for the associated message type. Can be used in conjunction with other header fields to define the subscription parameters, such as Interval, Duration, Timeout, Storage Level and Message Level. If no interval is provided, messages will be sent as and when new data is available. Some data, such as GPS position, may require a set interval to be provided. 5: UNSUBSCRIBE— Unsubscribe from a previous subscription.	uint8

This is an extract of header fields that are relevant to this message type, you can find them all documented in the Headers section.

Payload

Field	Name	Description	Type	Unit
1	SNR Average	Average signal-to-noise ratio across all satellites	uint8
2	SNR Minimum	Minimum signal-to-noise ratio among all satellites	uint8
3	SNR Maximum	Maximum signal-to-noise ratio among all satellites	uint8
4	Total Satellites	Total number of satellites in view	uint8
5	Good Satellites	Heuristic for signal quality (defined as satellites with SNR>=38dBm. This number should be higher than 8 for a good RTK fix, typically)	uint8
10	GPS L1	Summary data for GPS L1 satellites	bytes
11	GPS Lx	Summary data for GPS L2 or L5 satellite signals (depending on hardware)	bytes
12	GLONASS L1	Summary data for GLONASS L1 satellite signals	bytes
13	GLONASS Lx	Summary data for GLONASS L2 or L5 satellite signals (depending on hardware)	bytes
14	Beidou L1	Summary data for Beidou L1 satellite signals	bytes
15	Beidou Lx	Summary data for Beidou L2 or L5 satellite signals (depending on hardware)	bytes
16	Galileo L1	Summary data for Galileo L1 satellite signals	bytes
17	Galileo Lx	Summary data for Galileo L2 or L5 satellite signals (depending on hardware)	bytes

Examples

RTK fix satellite data

Protocol

3

3

Length

781

334 bytes

Type

160

16 (Satellite Data)

Header Count

20

2

Header Types

21

2, 1

Client ID

87310218300000

12019273

Message ID

4621100

2878

Payload Count

130

13

Payload Types

123451011121314151617

1, 2, 3, 4, 5, 10, 11, 12, 13, 14, 15, 16, 17

SNR Average

142

42

SNR Minimum

124

24

SNR Maximum

152

52

Total Satellites

167

67

Good Satellites

157

57

GPS L1

41101551414925311249334156424241284010145541256252526117025285633503164704732262846

10,1,55,141,49,2,53,112,49,3,34,156,42,4,24,128,40,10,14,55,41,25,6,25,25,26,11,70,25,28,56,33,50,31,64,70,47,32,26,28,46

GPS Lx

338155141513341564642412847101455472562536261170402856334932262840

8,1,55,141,51,3,34,156,46,4,24,128,47,10,14,55,47,25,6,25,36,26,11,70,40,28,56,33,49,32,26,28,40

GLONASS L1

37965525506636148487216324974191944753447487612764181371534282416929884211452

9,65,52,5,50,66,36,148,48,72,16,32,49,74,19,19,44,75,34,47,48,76,12,76,41,81,37,153,42,82,4,169,29,88,42,114,52

GLONASS Lx

10

0

Beidou L1

4511113612743142114238216018522218403826277840342811343361221434071574042451504843261424245374444

11,11,36,127,43,14,21,142,38,21,60,18,52,22,18,40,38,26,27,78,40,34,28,113,43,36,12,21,43,40,7,157,40,42,45,150,48,43,26,142,42,45,37,44,44

Beidou Lx

379216018512218404326277850342811342361221434071574042451505043261424545374443

9,21,60,18,51,22,18,40,43,26,27,78,50,34,28,113,42,36,12,21,43,40,7,157,40,42,45,150,50,43,26,142,45,45,37,44,43

Galileo L1

4110464145267315150952131501046874811671084612248146191128282100272385042364115546

10,4,64,14,52,6,73,151,50,9,52,131,50,10,46,87,48,11,67,108,46,12,24,81,46,19,11,28,28,21,0,0,27,23,8,50,42,36,41,155,46

Galileo Lx

4110464144667315148952131471046874511671084112248134191128302100252385024364115543

10,4,64,14,46,6,73,151,48,9,52,131,47,10,46,87,45,11,67,108,41,12,24,81,34,19,11,28,30,21,0,0,25,23,8,50,24,36,41,155,43

Checksum

132222

56964

📡 Real example from RV1 P1 v2287 on 2025-10-03This example is captured from an RV1 device as part of normal communications with the cloud, somewhere in California.

Code

For convenience, the following constants can be used to reference this message type.