u-blox ZED-F9P Interface Description - Manual
Advance Information
5.12.8.2 UBX-MGA-QZSS-ALM
Message
UBX-MGA-QZSS-ALM
Description
QZSS Almanac Assistance
Firmware
Supported on:
•
u-blox 9 with protocol version 27
Type
Input
Comment
This message allows the delivery of QZSS almanac assistance to a receiver. See the
description of
for details.
Header
Class
ID
Length (Bytes)
Payload
Checksum
Message Structure
0xB5 0x62
0x13 0x05 36
see below
CK_A CK_B
Payload Contents:
Byte Offset
Number
Format
Scaling
Name
Unit
Description
0
U1
-
type
-
Message type (0x02 for this type)
1
U1
-
version
-
Message version (0x00 for this version)
2
U1
-
svId
-
QZSS Satellite identifier (see
), Range 1-5
3
U1
-
svHealth
-
Almanac SV health information
4
U2
2^-21
e
-
Almanac eccentricity
6
U1
-
almWNa
week
Reference week number of almanac (the 8 bit
WNa field)
7
U1
2^12
toa
s
Reference time of almanac
8
I2
2^-19
deltaI
semi-
circles
Delta inclination angle at reference time
10
I2
2^-38
omegaDot
semi-
circles/s
Almanac rate of right ascension
12
U4
2^-11
sqrtA
m^0.5
Almanac square root of the semi-major axis A
16
I4
2^-23
omega0
semi-
circles
Almanac long of asc node of orbit plane at
weekly
20
I4
2^-23
omega
semi-
circles
Almanac argument of perigee
24
I4
2^-23
m0
semi-
circles
Almanac mean anomaly at reference time
28
I2
2^-20
af0
s
Almanac time polynomial coefficient 0 (8 MSBs)
30
I2
2^-38
af1
s/s
Almanac time polynomial coefficient 1
32
U1[4]
-
reserved1
-
UBX-18010854 - R04
Advance Information
Page 125 of 259
