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Command and Log Reference
62
6.2.7 BDSEPHEM BDS Ephemeris
This log contains BDS ephemeris.
Message ID: 1047
Recommend Input:
BDSEPHEMA ONCHANGED
LOG output:
#BD2EPHEMA,COM1,0,83.0,FINE,1971,121080.000,577928,577936,
18;1,121050.0,0,1,1,1971,1971,118800.0,4.21607,7.53959
9769e-10,1.86300,3.8039823994e-04,-2.666700,-
7.872469723e-06,2.252077684e-05,-6.7902,-
2.4002,-3.818422556e-08,-2.281740308e-
08,1.1047950166e-01,2.500104139e-12,-6.552244124e-
01,1.89650757e-10,0,118800.0,1.420000000e-08,-1.040000000e-
08,-1.29431e-04,4.63602e-11,0.00,FALSE,7.292058730e-
05,4.0000*ede59ac4
Table 6-27: BDS Ephemeris Message
ID Field Description Format Binary
Bytes
Binary
Offset
1 BDSEPHEM
header Log header H 0
2 PRN BDS satellite PRN umber
（
161~197
）
Ulong 4 H
3 Tow Time stamp of subframe 1(refer to GPST),
seconds Double 8 H+4
4 Health Health status:a 1-bit health code defined in
BDS-ICD-SIS-2.1 Ulong 4 H+12
5 AODE Age of data, ephemeris Ulong 4 H+16
6 AODE Age of data, ephemeris (same as field #5) Ulong 4 H+20
7 Week GPS week number(toe week) Ulong 4 H+24
8 Z Week Z count week number, which from
subframe 1(tow week) Ulong 4 H+28
9 Toe Reference time of ephemeris(refer to
GPST), seconds Double 8 H+32
10 A Semi-major axis of satellite orbit, meters Double 8 H+40
11 ΔN Correction of satellite Mean angular
velocity, radians/second Double 8 H+48
12 M0 Mean anomaly of TOE time, radians Double 8 H+56
13 Ecc Eccentricity of satellite orbit Double 8 H+64
14 ω Argument of perigee, radians Double 8 H+72
15 Cuc Argument of Latitude(amplitude of cosine, Double 8 H+80