Range Satellite Range Information; Europak-15Ab Receiver User Manual Rev - Novatel EuroPak-15ab User Manual

Chapter 6
6.3.5

RANGE Satellite Range Information

RANGE contains the channel measurements for the currently tracked satellites. When using this log, please
keep in mind the constraints noted along with the description.
It is important to ensure that the receiver clock model is valid. This can be monitored by the bits in the Receiver
Status field of the log header. Large jumps in pseudorange as well as accumulated Doppler range (ADR) will
occur as the clock is being adjusted. If the ADR measurement is being used in precise phase processing, it is
important not to use the ADR if the parity known flag in the ch-tr-status field is not set as there may exist a half
(1/2) cycle ambiguity on the measurement. The tracking error estimate of the pseudorange and carrier phase
(ADR) is the thermal noise of the receiver tracking loops only. It does not account for possible multipath errors
or atmospheric delays.
If a PRN is being tracked on more than one signal (GPS L1, GPS L5, Galileo L1, Galileo E5a or Galileo E5b)
multiple entries with the same PRN will appear in the range logs. As shown in Table 39 on Page 86, these
entries can be differentiated by bits 21-22 of the ch-tr-status field, which denote whether the observation is for
GPS L1, GPS L5, Galileo L1, Galileo E5a or Galileo E5b. This is to aid in parsing data.
Log Type: Synch
Field
Field
Name
1 header
2 # obs
3 PRN
4 Reserved
5 psr
6 psr std
7 adr
8 adr std
9 dopp
C/N 0
10
11 locktime
ch-tr-
12
status
13... Next data set, offset = H + 4 + (# previous obs x 44)
variable 32-bit CRC (ASCII and Binary only)
84
Description
This field contains the message header, in ASCII or Binary format. See
Section 4.3 on Page 38.
Number of data sets to follow.
Satellite PRN number of range measurement.
Pseudorange measurement (m).
Pseudorange measurement standard deviation (m).
Carrier phase, in cycles (accumulated Doppler range).
Estimated carrier phase standard deviation (cycles).
Instantaneous carrier Doppler frequency (Hz).
Carrier to noise density ratio
C/N 0 = 10[log 10 (S/N 0 )] (dB-Hz)
Number of seconds of continuous tracking (no cycle
slipping).
Tracking status. See Table 39 on Page 86.
Format
Long
UShort
UShort
Double
Float
Double
Float
Float
Float
Float
ULong
Hex

EuroPak-15ab Receiver User Manual Rev 1

Data Logs
Message ID: 43
Binary Binary
Bytes Offset
H 0
4 H
2 H+4
2 H+6
8 H+8
4 H+16
8 H+20
4 H+28
4 H+32
4 H+36
4 H+40
4 H+44
H+4+
4 (#obs x
44)