Trimble Outdoors 58052-00 Benutzerhandbuch
A TRIMBLE STANDARD INTERFACE PROTOCOL (TSIP)
1 5 2 Copernicus GPS Receiver
Report Packet 0x5A - Raw Measurement Data
This packet provides raw GPS measurement data. If the I/O Auxiliary options has
been selected, the receive sends this data automatically as measurements are taken.
The data format is shows in the table below.
been selected, the receive sends this data automatically as measurements are taken.
The data format is shows in the table below.
Note – Packet 0x5A provides the raw satellite signal measurement information used
in computing a fix.
in computing a fix.
Satellite PRN (Byte 0) is a unique identification number for each of the 32 GPS
satellites. The integer millisecond of the pseudo-range has valid values of 0 to 19
milliseconds. If the pseudo-range is out of bounds, this is indicated by setting Bit 7 of
Byte 4 to 1.
satellites. The integer millisecond of the pseudo-range has valid values of 0 to 19
milliseconds. If the pseudo-range is out of bounds, this is indicated by setting Bit 7 of
Byte 4 to 1.
The codephase (Byte 9) value is the average delay over the sample interval of the
received C/A code and is measured with respect to the receiver’s millisecond timing
reference. Thus, it includes all receiver satellite, and propagation biases and errors. It
is expressed in 1/16th of a C/A code chip.
received C/A code and is measured with respect to the receiver’s millisecond timing
reference. Thus, it includes all receiver satellite, and propagation biases and errors. It
is expressed in 1/16th of a C/A code chip.
The Doppler (Byte 13) value is apparent carrier frequency offset averaged over the
sample interval. It is measured with respect to the nominal GPS L1 frequency of
1575.42 MHz, referenced to the receiver’s internal oscillator. Thus int includes all
receiver and satellite clock frequency errors. It is expressed in Hertz at the L1 carrier.
sample interval. It is measured with respect to the nominal GPS L1 frequency of
1575.42 MHz, referenced to the receiver’s internal oscillator. Thus int includes all
receiver and satellite clock frequency errors. It is expressed in Hertz at the L1 carrier.
The time of measurement (Byte 17) is the center of the sample interval adjusted by
adding the receiver supplied codephase (module mS) to a user determined integer
number of mS between user and satellite.
adding the receiver supplied codephase (module mS) to a user determined integer
number of mS between user and satellite.
139-146
n
Double
derived from delta_n
147-154
r1me2
Double
= sqrt(1.0-e2)
155-162
OMEGA_n
Double
derived from OMEGA_0,
OMEGADOT
OMEGADOT
163-170
ODOT_n
Double
derived from OMEGADOT
Table A.45
Report Packet 0x5A Data Formats
Byte
Item
Type
Units
0
Satellite PRN number
UINT8
----
1-3
reserved
4
Integer msec of pseudo-
range
range
If Bit 7 =1, pseudo-range is
out of bounds
out of bounds
UINT 8
msec
5
Signal level
Single
AMU or dBHz
9
Code phase
Single
1/16th chip
13
Doppler
Single
hertz
17
Time of Measurement
Double
sec
Table A.44
(continued)
Byte
Item
Type
Definition / IDC -GPS-200