NavCom Sapphire Rev.J - Manual (Page 268)

Sapphire Technical Reference Manual Rev. J
268
Table 113: CHNLSTATUS1B Satellite Block, One per PRN
Data Item (4 + 6 * M Bytes) Data Type Section
PRN (1-37 for GPS, 120-138 for WAAS/EGNOS, 38-61 for
GLONASS, TBD for Galileo)
U08 2.15.7.1
Number of channel blocks for this PRN U08 2.15.7.2
Satellite azimuth and elevation (azimuth 9 MSB, elevation 7 LSB) U16 2.15.7.3
Blocks per channel assigned to this PRN (see Table 115) 2.15.8
2.15.7.1 PRN
This field displays the PRN number of the satellite being tracked. This field is coded
using native PRN numbers (1-32 for GPS, 120-138 for WAAS\EGNOS, 1-24 for
GLONASS, TBD for GALILEO). Use this field in conjunction with the constellation type
field (next) to determine which constellation the PRN is associated with.
2.15.7.2 Constellation Type and Channel Block Count
The constellation type describes which type of satellite data is displayed in this block.
This is the 3 MSB (bits 7:5) describing the constellation according to Table 114. The 5
LSB (bits 4:0) count the number of channel blocks that follow for this PRN.
Table 114: Constellation Type
Number Data Item
0 GPS
1 Galileo
2 SBAS
3 GLONASS
2.15.7.3 Satellite Azimuth and Elevation
The upper 9 MSB (bits 15:7) describe the azimuth in units of 1 degree, ranging from 0 to
359 degrees. The lower 7 MSB (bits 6:0) describe the satellite elevation in units of
1 degree, ranging from 0 to 90 degrees.
2.15.8 Block per Channel
This section of the CHNLSTATUS1B binary message data displays a block containing
information for each channel allocated to the PRN in the satellite block above. Table 115
shows the values contained in this block; descriptions of the fields can be found in the
sections indicated.
Table 115: CHNLSTATUS1B Blocks per Channel
Data Item (6 Bytes) Data Type Section
Channel number U08 2.15.8.1
Code type and allocation mode U08 2.15.8.2
Tracking status and loop bandwidth U08 2.15.8.3
CN
0
U08 2.15.8.4
Reserved U08
Reserved U08