Deluo TRISTAR25 - Manual (Page 27)

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27
4.2.2.3 EverMore Binary Output Message 0x06: Channel Status
Purpose
Output:
1 GPS time.
2 Number of satellites in view.
3 Satellite ID, elevation angle, azimuth angle, C/N estimate, and status of the correlated
channels. This set of data is sent for each in-view satellites.
Format
Byte #
Contents Range Size Scale Unit
1 Message ID = 0x06 Unsigned byte
2 ~ 3 GPS week 0 ~ 65535 Unsigned 16bit integer week
4 ~ 7 GPS tow 0 ~ 60479900 Unsigned 32bit integer 1/100 sec
8 Number of SV in view 0 ~ 12 Unsigned byte
Channel Data (7 bytes per channel). N=1,2,3,…n for the n visible satellites.
Byte # Contents Range Size Unit
7N+2 Channel 1 ~ 12 Unsigned byte
7N+3 SV ID 1 ~ 32 Unsigned byte
7N+4
~7N+5
Azimuth 0 ~ 359 Unsigned byte Degree
7N+6 Elevation 0 ~ 90 Unsigned byte Degree
7N+7 C/N 0 ~ 99 Unsigned byte dB/Hz
7N+8 Channel Status
bit0 = 1 satellite acquired
bit1 = 1 code-tracking loop locked
bit2 = 1 carrier-tracking loop locked
bit3 = 1 data-bit synchronization done
bit4 = 1 frame synchronization done
bit5 = 1 ephemeris data collected
bit6 = 1 used for position fix
Total length of message 0x06: 8 + 7 * Number Of Visible Satellites
Minimum length: 8 bytes (0 satellite visible)
Maximum length: 92 bytes (12 satellites visible)