BDSEPHEMERIS

Decoded BDS ephemeris

Platform:

OEM719, OEM729, OEM7500, OEM7600, OEM7700, OEM7720, PwrPak7, CPT7, CPT7700, SMART7, SMART2

This log contains a single set of BDS B1I ephemeris parameters with appropriate scaling applied. Multiple messages are transmitted, one for each SV ephemeris collected.

Message ID: 1696

Log Type: Asynch

Recommended Input:

log bdsephemerisa onall

ASCII Example:

#BDSEPHEMERISA,USB1,37,62.0,SATTIME,2209,496784.000,02000020,2626,16809;6,853,
2.00,0,8.30e-09,-1.60e-09,0,493200,-2.22835224e-05,7.54090124e-11,0.00000000,
1,493200,6493.813231,2.7420885162e-03,-2.990457924,7.3681640565e-10,
-2.306284799,-8.5916965356e-01,-1.83364781e-09,9.4558331017e-01,
-1.049329423e-09,-5.817040801e-06,2.914015204e-05,-660.2187500,-168.3906250,
1.862645149e-08,-1.862645149e-09*7a36ae90

#BDSEPHEMERISA,USB1,36,62.0,SATTIME,2209,446414.000,02000020,2626,16809;7,853,
2.00,0,1.42e-08,7.00e-10,0,446400,-1.59412972e-04,-4.91571228e-11,0.00000000,
1,446400,6493.661501,2.0398380002e-03,3.127789902,2.1922341725e-09,
-1.234405677,1.121228087e+00,-3.13084470e-09,8.7727285371e-01,1.428630937e-11,
4.341825843e-06,-1.132534817e-05,564.6718750,139.0781250,5.261972547e-08,
-2.561137080e-08*f39a85dd

...

#BDSEPHEMERISA,USB1,1,62.0,SATTIME,2209,475214.000,02000020,2626,16809;46,853,
2.00,0,-2.41e-08,-2.41e-08,1,475200,-3.22318403e-04,-2.03899120e-11,0.00000000,
1,475200,5282.635483,6.9640530273e-04,-0.109104372,3.9308780226e-09,
2.513097275,1.3085507441e-01,-6.78742558e-09,9.5335228732e-01,3.782300405e-10,
5.458947271e-06,1.009693369e-05,153.7500000,108.2187500,-8.568167686e-08,
-1.001171768e-07*8c90e4b5

#BDSEPHEMERISA,USB1,0,62.0,SATTIME,2208,422804.000,02000020,2626,16809;58,852,
2.00,1,-9.00e-09,0.00,28,295200,2.80906679e-05,3.90798505e-13,0.00000000,
29,295200,5282.617880,4.8023159616e-04,0.041959073,3.3054948300e-09,
0.355899976,-2.126947333e+00,-6.67813531e-09,9.7631596256e-01,2.464388366e-11,
-9.997747838e-07,9.569805115e-06,175.8125000,-20.7031250,-1.164153218e-08,
-9.778887033e-09*2efb9c0a

Field

Field Type

Description

Format

Binary Bytes

Binary Offset

1

Log header

BDSEPHEMERIS header

For information about log headers, see ASCII, Abbreviated ASCII or Binary.

 

H

0

2

satellite ID

ID/ranging code

Ulong

4

H

3

Week

Week number in BeiDou time (BDT) since the BeiDou system time start epoch (January 1, 2006)

Ulong

4

H+4

4

URA

User range accuracy (m). This is the evaluated URAI/URA lookup-table value.

Double

8

H+8

5

health 1

Autonomous satellite health flag. 0 means broadcasting satellite is good and 1 means not.

Ulong

4

H+16

6

tgd1

Equipment group delay differential for the B1 signal (s)

Double

8

H+20

7

tgd2

Equipment group delay differential for the B2 signal (s)

Double

8

H+28

8

AODC

Age of data, clock

Ulong

4

H+36

9

toc

Reference time of clock parameters (s)

Ulong

4

H+40

10

a0

Constant term of clock correction polynomial (s)

Double

8

H+44

11

a1

Linear term of clock correction polynomial (s/s)

Double

8

H+52

12

a2

Quadratic term of clock correction polynomial (s/s^2)

Double

8

H+60

13

AODE

Age of data, ephemeris

Ulong

4

H+68

14

toe

Reference time of ephemeris parameters (s)

Ulong

4

H+72

15

RootA

Square root of semi-major axis (sqrt(m))

Double

8

H+76

16

ecc

Eccentricity (dimensionless)

Double

8

H+84

17

ω

Argument of perigee (radians)

Double

8

H+92

18

ΔN

Mean motion difference from computed value (radians/s)

Double

8

H+100

19

M0

Mean anomaly at reference time (radians)

Double

8

H+108

20

Ω0

Longitude of ascending node of orbital of plane computed according to reference time (radians)

Double

8

H+116

21

Rate of right ascension (radians/s)

Double

8

H+124

22

i0

Inclination angle at reference time (radians)

Double

8

H+132

23

IDOT

Rate of inclination angle (radians/second)

Double

8

H+140

24

cuc

Amplitude of cosine harmonic correction term to the argument of latitude (radians)

Double

8

H+148

25

cus

Amplitude of sine harmonic correction term to the argument of latitude (radians)

Double

8

H+156

26

crc

Amplitude of cosine harmonic correction term to the orbit radius (m)

Double

8

H+164

27

crs

Amplitude of sine harmonic correction term to the orbit radius (m)

Double

8

H+172

28

cic

Amplitude of cosine harmonic correction term to the angle of inclination (radians)

Double

8

H+180

29

cis

Amplitude of sine harmonic correction term to the angle of inclination (radians)

Double

8

H+188

30

xxxx

32-bit CRC (ASCII and Binary only)

Ulong

4

H+196

31

[CR][LF]

Sentence terminator (ASCII only)

-

-

-