BDSBCNAV1EPHEMERIS

Decoded BeiDou B-CNAV1 ephemeris

Platform:

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

This log provides the decoded BeiDou B-CNAV1 ephemeris for the BeiDou B1C signal.

Message ID: 2371

Log Type: Asynch

Recommended Input:

log bdsbcnav1ephemerisa onall

Example log:

#BDSBCNAV1EPHEMERISA,USB1,6,59.0,SATTIME,2209,496436.000,02000020,27d6,16809;
25,853,00000000,25,493200,3,83.013672,-0.003732,3.9006981940e-09,
1.9335870986e-14,0.477429585,4.3404346798e-04,0.447233249,1.0544811238e-01,
9.4935254055e-01,-6.84742808e-09,3.476930542e-10,5.401670933e-08,
-3.539025784e-08,128.6171875,146.8867188,1.032091677e-05,6.321817636e-06,
25,493200,-7.37199793e-04,5.41433565e-12,0.00000000,1.920852810e-09,
-1.711305231e-08,-2.328306437e-10,0*eb1ad752

#BDSBCNAV1EPHEMERISA,USB1,5,59.0,SATTIME,2209,496436.000,02000020,27d6,16809;
24,853,00000000,25,493200,3,19.027344,0.006292,3.9494502247e-09,
-6.8209628314e-14,1.247259053,4.9585988745e-04,0.517626996,1.3024422419e-01,
9.4798221860e-01,-6.90885921e-09,3.485859486e-10,2.421438694e-08,
-5.587935448e-09,115.0976563,154.5429688,9.900890291e-06,5.632638931e-06,
25,493200,-9.63939528e-04,-4.78550533e-12,0.00000000,1.175794750e-08,
-1.484295353e-08,2.910383046e-10,0*273a26ab

...

#BDSBCNAV1EPHEMERISA,USB1,1,59.0,SATTIME,2209,496436.000,02000020,27d6,16809;
39,853,00000000,25,493200,2,5263.894531,-0.062899,7.7092496926e-10,
1.9584381616e-13,-2.140521199,2.2453696001e-03,-2.871042649,-9.3801678773e-01,
9.6155928554e-01,-1.86489911e-09,-1.102724504e-09,-4.284083843e-08,
4.004687071e-08,-83.8671875,-507.8242188,2.449937165e-05,-3.319233656e-06,
25,493200,3.49998591e-05,3.10862447e-14,0.00000000,7.799826562e-09,
-1.426087692e-08,-3.492459655e-10,0*890d2cfd

#BDSBCNAV1EPHEMERISA,USB1,0,59.0,SATTIME,2209,496436.000,02000020,27d6,16809;
44,853,00000000,25,493200,3,65.369141,-0.011349,3.8406956947e-09,
1.0343710014e-13,-0.198007475,8.3381979493e-04,0.582406796,2.199813208e+00,
9.5949562234e-01,-6.96636161e-09,-4.343038048e-10,-5.215406418e-08,
-4.190951586e-08,-118.6484375,212.3242188,7.395632565e-06,-5.853362381e-06,
25,493200,6.58427074e-04,1.22231114e-11,0.00000000,-2.153683454e-09,
-1.199077815e-08,-2.910383046e-10,0*aaff1aac

Field

Field Type

Description

Format

Binary Bytes

Binary Offset

1

Log header

BDSBCNAV1EPHEMERIS header

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

–

H

0

2

Satellite ID

ID/ranging code

Ulong

4

H

3

WN

Week number in BeiDou time (BDT).

This will be offset from GPS time by 1356 weeks.

Ulong

4

H+4

4

Satellite Status

Satellite Status Information:

Bits 0 to 1: Health Status (HS)

Bit 2: Data Integrity Flag (DIF)

Bit 3: Signal Integrity Flag (SIF)

Bit 4: Accuracy Integrity Flag (AIF)

Bits 5 to 8: Signal In Space Monitoring Accuracy Index (SISMAI)

Hex Ulong

4

H+8

5

IODE

Issue of data, ephemeris

Ulong

4

H+12

6

toe

Reference time of ephemeris parameters in BeiDou time (BDT). (s)

This will be offset from GPS time.

Ulong

4

H+16

7

Satellite Type

2 bit orbit type:

01 indicates GEO,

10 indicates IGSO,

11 indicates MEO

Ulong

4

H+20

8

DeltaA

Semi-major axis difference at reference time (m)

Double

8

H+24

9

ADot

Change rate in Semi-major axis (m/s)

Double

8

H+32

10

DeltaN

Mean motion difference from computed value (radians/s)

Double

8

H+40

11

NDot

Rate of Mean motion difference from computed value (radians/s2)

Double

8

H+48

12

M0

Mean anomaly at reference time (radians)

Double

8

H+56

13

e

Eccentricity (unitless)

Double

8

H+64

14

Omega

Argument of perigee (radians)

Double

8

H+72

15

Omega0

Longitude of ascending node of orbital of plane at weekly epoch (radians)

Double

8

H+80

16

i0

Inclination angle at reference time (radians)

Double

8

H+88

17

OmegaDot

Rate of right ascension (radians/s)

Double

8

H+96

18

i0Dot

Rate of inclination angle (radians/s)

Double

8

H+104

19

Cis

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

Double

8

H+112

20

Cic

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

Double

8

H+120

21

Crs

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

Double

8

H+128

22

Crc

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

Double

8

H+136

23

Cus

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

Double

8

H+144

24

Cuc

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

Double

8

H+152

25

IODC

Issue of data, clock

Ulong

4

H+160

26

toc

Reference time of clock parameters in BeiDou time (BDT). This will be offset from GPS time by 14 seconds. (s)

Ulong

4

H+164

27

a0

Constant term of clock correction polynomial (s)

Double

8

H+168

28

a1

Linear term of clock correction polynomial (s/s)

Double

8

H+176

29

a2

Quadratic term of clock correction polynomial (s/s2)

Double

8

H+184

30

TGDB1Cp

Group delay differential between the B1C pilot component and the B3I signal (s)

Double

8

H+192

31

TGDB2Ap

Group delay differential between the B2a pilot component and the B3I signal (s)

Double

8

H+200

32

ISCB1Cd

Group delay differential between the B1C data and pilot components (s)

Double

8

H+208

33

Reserved

Ulong

4

H+216

34

xxxx

32-bit CRC (ASCII and Binary only)

Hex

4

H+220

35

[CR][LF]

Sentence Terminator (ASCII only)

–

–

–