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

BYTE/

 

 

number

number 1-32

 

 

Byte 1 / Channel and

BYTE

 

 

slot code

 

 

 

 

 

 

 

 

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

BYTE

0

never acquired

flag

 

1

acquired

 

 

2 re-opened search

Byte 3 / Ephemeris

BYTE

0

flag not set

flag

 

≠ (

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

SINGLE/

< 0 no measurements have been taken

of last measurement

seconds

0 center of the last measurement taken

 

 

 

from this satellite

A-68

Acutime 2000 Synchronization Kit User Guide

Page 174
Image 174
Trimble Outdoors Part Number 45005-00-ENG manual Satellite Tracking Status Report, Table A-58 Report Packet 5C