u-blox ZED-F9P Interface Description - Manual
Advance Information
5.12.4 UBX-MGA-GAL (0x13 0x02)
5.12.4.1 UBX-MGA-GAL-EPH
Message
UBX-MGA-GAL-EPH
Description
Galileo Ephemeris Assistance
Firmware
Supported on:
• u-blox 9 with protocol version 27
Type
Input
Comment
This message allows the delivery of Galileo ephemeris assistance to a receiver. See the
description of AssistNow Online for details.
Header Class ID Length (Bytes) Payload Checksum
Message Structure
0xB5 0x62 0x13 0x02 76
see below
CK_A CK_B
Payload Contents:
Byte Offset Number
Format
Scaling Name Unit Description
0 U1 - type - Message type (0x01 for this type)
1 U1 - version - Message version (0x00 for this version)
2 U1 - svId - Galileo Satellite identifier (see Satellite
Numbering)
3 U1 - reserved1 - Reserved
4 U2 - iodNav - Ephemeris and clock correction Issue of Data
6 I2 2^-43 deltaN semi-
circles/s
Mean motion difference from computed value
8 I4 2^-31 m0 semi-
circles
Mean anomaly at reference time
12 U4 2^-33 e - Eccentricity
16 U4 2^-19 sqrtA m^0.5 Square root of the semi-major axis
20 I4 2^-31 omega0 semi-
circles
Longitude of ascending node of orbital plane at
weekly epoch
24 I4 2^-31 i0 semi-
circles
Inclination angle at reference time
28 I4 2^-31 omega semi-
circles
Argument of perigee
32 I4 2^-43 omegaDot semi-
circles/s
Rate of change of right ascension
36 I2 2^-43 iDot semi-
circles/s
Rate of change of inclination angle
38 I2 2^-29 cuc radians Amplitude of the cosine harmonic correction
term to the argument of latitude
40 I2 2^-29 cus radians Amplitude of the sine harmonic correction term
to the argument of latitude
42 I2 2^-5 crc radians Amplitude of the cosine harmonic correction
term to the orbit radius
44 I2 2^-5 crs radians Amplitude of the sine harmonic correction term
to the orbit radius
46 I2 2^-29 cic radians Amplitude of the cosine harmonic correction
term to the angle of inclination
UBX-18010854 - R04 Advance Information Page 107 of 259
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