User's Manual

SPSx50 Modular GPS Receiver User Guide 139
GSOF Messages B
SV Detail
This message provides detailed satellite information. It contains the following data:
• Number of satellites tracked
• The PRN number of each satellite
• Flags indicating satellite status
• Elevation above horizon, in degrees
• Azimuth from True North, in degrees
• Signal-to-noise ratio (SNR) of L1 signal
• Signal-to-noise ratio (SNR) of L2 signal
SV Flags2 Char See
Table B.19
Second set of satellite status bits
† Includes all tracked satellites, all satellites used in the position solution, and all
satellites in view.
Table B.10 SV detail (Type 14 record)
Field Item Type Value Meaning
0 Output record
type
Char 0Eh Detailed satellite information output
record
1 Record length Char 1 +
8×(number of
SVs)
Bytes in record
2-9 Number of SVs Char 00h-18h Number of satellites included in record
†
The following bytes are repeated for Number of SVs
PRN Char 01h-20h Pseudorandom number of satellites (1-32)
Flags1 Char See Table B.18 First set of satellite status bits
Flags2 Char See Table B.19 Second set of satellite status bits
Elevation Char Degrees Angle of satellite above the horizon
Azimuth Short Degrees Azimuth of satellite from true north
SNR L1 Char dB * 4 Signal-to-noise ratio of L1 signal
(multiplied by 4)
††
SNR L2 Char dB * 4 Signal-to-noise ratio of L2 signal
(multiplied by 4)
††
† Includes all tracked satellites, all satellites used in the position solution, and all
satellites in view.
†† Set to zero for satellites that are not tracked on the current frequency (L1 or L2
Table B.9 SV brief (Type 13 record)
Field Item Type Value Meaning