Satposb - Novatel WAAS G-III User Manual

Chapter 5

5.5.17 SATPOSB

This log contains the calculated satellite position, elevation angles, azimuth angles and calculated Dopplers for
all GPS satellites. The accuracy of the data is dependent on the accuracy of the input position since the G-III
Reference Receiver does not calculate its own position.
The satellite position is in WGS84 ECEF coordinates.
Output states:
Valid trigger:
Frequency:
Message ID:
Header Format:
Field Field Name
1 Header
2 System
3 Sat vis
4 Comp alm
5 # entries
6 PRN
7 Reserved
8 EphemValidity
9 AlmValidity
10 EphemHealth
11 EphemElevation
12 EphemAzimuth
13 EphemDop
14 AlmHealth
15 AlmElevation
16 AlmAzimuth
17 AlmDop
122
Operational
ONCE, ONTIME
Requested frequency
4106
G-III Log
Description
G-III log header
System the log pertains to
0 = GPS
Indicates if the satellite visibility is valid.
Indicates if the entries in the log are computed
from the almanac.
TRUE = all data in the log is computed from the
almanac
FALSE = all data in the log is computed from
the ephemeris.
Number of entries to follow
GPS PRN
Reserved
Validity of the ephemeris data:
0 = Data is valid
1 = Data available but health status is all 1s
2 = No data available
Validity of almanac data:
0 = Data is valid
1 = Data available but health status is all 1s
2 = No data available
Health status from the ephemeris
Elevation angle from the ephemeris (degrees)
Azimuth angle from the ephemeris (degrees)
Geometric Doppler from the ephemeris (Hz)
Health status from the almanac
Elevation angle from the almanac (degrees)
Azimuth angle from the almanac (degrees)
Geometric Doppler from the almanac (Hz)
Format
Enum
Bool
Bool
Ulong
Ushort
Ushort
Ushort
Ushort
Ulong
a
Float
b
Float
Float
Ulong
a
Float
b
Float
Float
WAAS G-III Reference Receiver User Manual Rev 1
Data Logs
# Bytes Binary Offset
H 0
4 H
4 H+4
4 H+8
4 H+12
2 H+16
2 H+18
2 H+20
2 H+22
4 H+24
4 H+28
4 H+32
4 H+36
4 H+40
4 H+44
4 H+48
4 H+52