u-blox ZED-F9P Interface Description - Manual
Advance Information
MGA-BDS continued
Byte Offset
Number
Format
Scaling
Name
Unit
Description
64
I4
2^-31
Cus
semi-
circles
Amplitude of sine harmonic correction term to
the argument of latitude
68
I4
2^-6
Crc
m
Amplitude of cosine harmonic correction term
to the orbit radius
72
I4
2^-6
Crs
m
Amplitude of sine harmonic correction term to
the orbit radius
76
I4
2^-31
Cic
semi-
circles
Amplitude of cosine harmonic correction term
to the angle of inclination
80
I4
2^-31
Cis
semi-
circles
Amplitude of sine harmonic correction term to
the angle of inclination
84
U1[4]
-
reserved2
-
5.12.2.2 UBX-MGA-BDS-ALM
Message
UBX-MGA-BDS-ALM
Description
BDS Almanac Assistance
Firmware
Supported on:
•
u-blox 9 with protocol version 27
Type
Input
Comment
This message allows the delivery of BeiDou almanac assistance to a receiver. See the
description of
for details.
Header
Class
ID
Length (Bytes)
Payload
Checksum
Message Structure
0xB5 0x62
0x13 0x03 40
see below
CK_A CK_B
Payload Contents:
Byte Offset
Number
Format
Scaling
Name
Unit
Description
0
U1
-
type
-
Message type (0x02 for this version)
1
U1
-
version
-
Message version (0x00 for this version)
2
U1
-
svId
-
BeiDou satellite identifier (see
3
U1
-
reserved1
-
4
U1
-
Wna
week
Almanac Week Number
5
U1
2^12
toa
s
Almanac reference time
6
I2
2^-19
deltaI
semi-
circles
Almanac correction of orbit reference inclination
at reference time
8
U4
2^-11
sqrtA
m^0.5
Almanac square root of semi-major axis
12
U4
2^-21
e
-
Almanac eccentricity
16
I4
2^-23
omega
semi-
circles
Almanac argument of perigee
20
I4
2^-23
M0
semi-
circles
Almanac mean anomaly at reference time
24
I4
2^-23
Omega0
semi-
circles
Almanac longitude of ascending node of orbit
plane at computed according to reference time
UBX-18010854 - R04
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Page 103 of 259
