REFERENCE MANUAL - FTP Directory Listing - Trimble

A
TRIMBLE STANDARD INTERFACE PROTOCOL (TSIP)
Report Packet 0x47 - Signal Levels for all Satellites
This packet provides received signal levels for all satellites currently being tracked or
on which tracking is being attempted (i.e., above the elevation mask and healthy
according to the almanac). The receiver sends this packet only in response to Packet
0x27. The data format is shown below.
Table A.31
Report Packet 0x47 Data Formats
Byte Item Type
0 Count UINT8
1 Satellite number 1 UINT8
2- 5 Signal level 1 Single
6 Satellite number 2 UINT8
7-10 Signal level 2 Single
(etc.) (etc.) (etc.)
Up to 12 satellite number/signal level pairs may be sent, indicated by the count field.
Signal level is normally positive. If it is zero then that satellite has not yet been
acquired. If it is negative then that satellite is not currently in lock. The absolute value
of signal level field is the last known signal level of that satellite.
Note – The signal level provided in this packet is a linear measurement of the signal
strength after correlation or de-spreading. Units, either AMU or dBHz, are controlled
by Packet 0x35.
144 Copernicus GPS Receiver