DR + GPS
STARTER KIT REFERENCE MANUAL
Lassen DR + GPS Reference Manual 92
0x33-01: GPS Channel Measurement Short Status
This report message type is indexed by channel number (0-7 for eight-channel
receivers and 0-11 for twelve-channel receivers).
If the query is “query-all” (0xFF), only assigned channels will be reported. If
channel status is queried for an unassigned channel, the data fields (including
SV PRN) are zero-filled.
Table 66: 0x33-01: GPS Channel Measurement Short Status
Byte Name Type Units Range /
Value Meaning
Code U8 0x33
Subcode U8 0x01
Index U4 0-11 Channel
0 SV PRN U5 0
1 – 32
Channel
unassigned
SV PRN
1 0 SV Visible U1 1 = Elevation >
Mask
1 1 reserved U1
1 2 SV Has Been
Tracked
U1 1 = Already
Tracked
1 3 reserved U1
1 4 SV Currently
Tracking
U1 1 = Tracking
1 5 SV Meets SNR
Mask
U1 1 = SNR Meets
Mask
2 SNR U8 0.2 dB-Hz [0,48] dBHz
3 Azimuth U8
2° [0°, 358°]
4 Elevation S8
1° [-90°,90°]
5 0-1 Almanac Status U2 0
1
3
None
Old
Current
5 2-3 Ephemeris Status U2 0
1
2
3
None
Old
Decoded
Verified