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A-68 Acutime 2000 Synchronization Kit User Guide
Trimble Standard Interface Protocol
A
0x5C Report Packet 5C
Satellite Tracking Status Report
This packet provides tracking status data for a specified satellite.
Some of the information is very implementation-dependent and is
provided mainly for diagnostic purposes. The receiver sends this
packet in response to packet 3C hex. The data format is shown below.
Table A-58 Report Packet 5C
Byte/Item Type/Units Value/Meaning
Byte 0 / Satellite PRN
number
BYTE/
number 1-32
Byte 1 / Channel and
slot code
BYTE
Bit position within Byte 1: bits 7(MSB)-3
(channel number beginning with 0)
(MSB)
0 0 0 0 0 channel 1: used by all receivers
0 0 0 0 1 channel 2: 8-channel receivers
0 0 0 1 0 channel 3: 8-channel receivers
0 0 0 1 1 channel 4: 8-channel receivers
0 0 1 0 0 channel 5: 8-channel receivers
0 0 1 0 1 channel 6: 8-channel receivers
0 0 1 1 0 channel 7: 8-channel receivers
0 0 1 1 1 channel 8: 8-channel receivers
Byte 2 / Acquisition
flag
BYTE 0 never acquired
1 acquired
2 re-opened search
Byte 3 / Ephemeris
flag
BYTE 0 flag not set
≠ (0 or 33) good ephemeris for this
satellite
(<4 hours old, good health)
Byte 4-7 / Signal level SINGLE same as in packet 47 hex
Byte 8-11 / GPS time
of last measurement
SINGLE/
seconds
<0 no measurements have been taken
≥0 center of the last measurement taken
from this satellite