NAVICEPHEMERIS

Decoded NavIC Ephemeris

Platform:

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

This log contains NavIC ephemeris parameters with the appropriate scaling applied. Multiple messages are transmitted, one for each SV ephemeris collected.

Message ID: 2123

Log Type: Asynch

Recommended Input:

log navicephemerisa onall

ASCII Example:

#NAVICEPHEMERISA,COM1,5,74.0,SATTIME,1943,255984.000,02000020,01fa,32768;2,919,1.05838757e‑04,‑5.63886715e‑11,0.00000000,0,252000,‑1.86e‑09,3.2829938927e‑09,11,0,0,0,1.922249794e‑06,1.032650471e‑05,2.011656761e‑07,4.097819328e‑08,-230.9375000,66.1250000,-5.239503961e‑10,0,1.900019163,252000,1.8492219970e‑03,6493.385761,1.842761896e+00,3.027013584,-2.94012247e‑09,5.0965660552e‑01,0,0,0*d2f4c9a5

#NAVICEPHEMERISA,COM1,4,74.0,SATTIME,1943,255984.000,02000020,01fa,32768;6,919,-5.79587650e‑04,1.02318154e‑11,0.00000000,1,252000,-1.86e‑09,8.5817860373e‑09,11,0,0,0,-1.282989979e‑05,2.417713404e‑06,1.974403858e‑07,2.644956112e‑07,-83.3125000,‑395.3125000,-5.535944880e‑10,0,2.050709297,252000,1.9699299010e‑03,6493.408867,1.328589850e+00,2.996532035,‑7.66746224e‑09,7.5298187077e‑02,0,0,0*50cdb388

...

#NAVICEPHEMERISA,COM1,0,74.0,SATTIME,1943,255984.000,02000020,01fa,32768;7,919,1.90386083e‑04,‑8.28777047e‑11,0.00000000,1,255024,‑1.40e‑09,6.3988379659e‑09,252,0,0,0,‑8.992850780e‑06,‑1.732259989e‑06,‑9.313225746e‑08,‑2.235174179e‑08,60.1250000,‑266.1875000,‑3.928735076e‑10,0,‑0.445949980,255024,2.4348858278e‑04,6493.269802,1.351327715e+00,1.099632488,‑5.54308803e‑09,7.6573741924e‑02,0,0,0*01bf330e

Field

Field Type

Description

Format

Binary Bytes

Binary Offset

1

Log header

NAVICEPHEMERIS header

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

-

H

0

2

PRN

Satellite Identifier

Ulong

4

H

3

WN

Week number since the NavIC system time start epoch (August 22nd 1999)

Ulong

4

H+4

4

Af0

Clock bias (s)

Double

8

H+8

5

Af1

Clock drift (s/s)

Double

8

H+16

6

Af2

Clock drift rate (s/s2)

Double

8

H+24

7

URA

SV Accuracy

Ulong

4

H+32

8

toc

Reference time for the satellite clock corrections (s)

Ulong

4

H+36

9

TGD

Total group delay (s)

Double

8

H+40

10

DeltaN

Mean motion difference (radian/s)

Double

8

H+48

11

IODEC

Issue of data ephemeris and clock

Ulong

4

H+56

12

Reserved

Ulong

4

H+60

13

L5 Health

Health status of navigation data on L5 SPS signal

0=OK; 1=bad

Ulong

4

H+64

14

S Health

Health status of navigation data on S SPS signal

0=OK; 1=bad

Ulong

4

H+68

15

Cuc

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

Double

8

H+72

16

Cus

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

Double

8

H+80

17

Cic

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

Double

8

H+88

18

Cis

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

Double

8

H+96

19

Crc

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

Double

8

H+104

20

Crs

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

Double

8

H+112

21

IDOT

Rate of inclination angle (radians/s)

Double

8

H+120

22

Spare

Ulong

4

H+128

23

M0

Mean anomaly (radians)

Double

8

H+132

24

toe

Time of ephemeris (s)

Ulong

4

H+140

25

Ecc

Eccentricity (dimensionless)

Double

8

H+144

26

RootA

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

Double

8

H+152

27

Omega0

Longitude of ascending node (radians)

Double

8

H+160

28

Omega

Argument of perigee (radians)

Double

8

H+168

29

OmegaDot

Rate of RAAN (radians/s)

Double

8

H+176

30

I0

Inclination angle (radians)

Double

8

H+184

31

Spare

Ulong

4

H+192

32

Alert flag

The utilization of navigation data shall be at the users’ own risk.

1=Alert; 0=OK

Ulong

4

H+196

33

AutoNav flag

When set to 1, satellite is in AutoNav mode.
Satellite broadcasts primary navigation parameters from AutoNav data sets with no uplink from ground for maximum of 7 days

Ulong

4

H+200

34

xxxx

32-bit CRC (ASCII and Binary only)

Hex

4

H+204

35

[CR][LF]

Sentence terminator (ASCII only)

-

-

-