QZSSEPHEMERIS

Decoded QZSS parameters

Platform:

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

This log contains a single set of QZSS L1 C/A ephemeris parameters.

Message ID: 1336

Log Type: Asynch

Recommended Input:

log qzssephemerisa onall

ASCII Example:

#QZSSEPHEMERISA,USB1,2,50.5,SATTIME,2209,512010.000,02000020,1e9d,16809;
194,512010.0,0,121,121,2209,2209,514800.0,4.215826861e+07,2.486532145e-09,
-3.127432312e+00,7.6143292477e-02,-1.585891666e+00,3.105588257e-05,
-7.426366210e-06,4.20750000e+02,1.02396875e+03,4.302710295e-07,
-8.195638657e-08,7.3058678204e-01,3.739441477e-10,6.7849504293e-01,
-2.86190492e-09,889,514800.0,9.313225746e-10,-1.13156e-07,-1.13687e-13,0.00000,
FALSE,7.293896144e-05,7.84000000e+00,0,0,0,0*42695181

#QZSSEPHEMERISA,USB1,1,50.5,SATTIME,2209,460800.000,02000020,1e9d,16809;
195,460800.0,0,65,65,2209,2209,464400.0,4.216786739e+07,1.912936824e-09,
-2.252659029e+00,7.4505718076e-02,-1.560284732e+00,-2.508051693e-05,
2.811849117e-05,-7.96906250e+02,-7.62375000e+02,1.281499863e-06,
7.413327694e-07,7.1167492174e-01,-6.507413917e-10,2.388640708e+00,
-2.51189034e-09,833,464400.0,0.000000000,-2.11736e-06,-2.27374e-13,0.00000,
FALSE,7.291348520e-05,7.84000000e+00,0,0,0,0*f8a88fc9

#QZSSEPHEMERISA,USB1,0,50.5,SATTIME,2209,482400.000,02000020,1e9d,16809;
196,482400.0,0,89,89,2209,2209,486000.0,4.216483448e+07,4.154101606e-09,
-2.467916384e+00,7.5259242672e-02,-1.556757964e+00,8.281320333e-06,
-1.931935549e-05,7.30312500e+02,2.36562500e+02,-1.218169928e-06,
-1.806765795e-07,5.9983243978e-01,8.503925651e-10,-2.154062884e+00,
-4.07552690e-09,857,486000.0,-3.725290298e-09,1.01195e-04,2.50111e-12,0.00000,
FALSE,7.292359328e-05,7.84000000e+00,0,0,0,0*fd6bdfea

Field

Field Type

Description

Format

Binary Bytes

Binary Offset

1

Log header

QZSSEPHEMERIS header

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

 

H

0

2

PRN

Satellite PRN number

Ulong

4

H

3

tow

Time stamp of subframe 0 (s)

Double

8

H+4

4

health

Health status

  • bits 0-5: 6-bit health code as defined in QZSS Interface Specification

  • bit 6: Alert flag

Ulong

4

H+12

5

IODE1

Issue of ephemeris data 1

Ulong

4

H+16

6

IODE2

Issue of ephemeris data 2

Ulong

4

H+20

7

week

GPS reference week number

Ulong

4

H+24

8

z week

Z count week number. This is the week number from subframe 1 of the ephemeris. The ‘toe week’ (field #7) is derived from this to account for rollover

Ulong

4

H+28

9

toe

Reference time for ephemeris (s)

Double

8

H+32

10

A

Semi-major axis (m)

Double

8

H+40

11

ΔN

Mean motion difference (radians/s)

Double

8

H+48

12

M0

Mean anomaly of reference time (radius)

Double

8

H+56

13

ecc

Eccentricity (dimensionless)

Double

8

H+64

14

ω

Argument of perigee (radians)

Double

8

H+72

15

cuc

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

Double

8

H+80

16

cus

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

Double

8

H+88

17

crc

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

Double

8

H+96

18

crs

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

Double

8

H+104

19

cic

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

Double

8

H+112

20

cis

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

Double

8

H+120

21

I0

Inclination angle at reference time (radians)

Double

8

H+128

22

İ

Rate of inclination angle (radians/s)

Double

8

H+136

23

ω0

Right ascension (radians)

Double

8

H+144

24

ώ

Rate of right ascension (radians/s)

Double

8

H+152

25

iodc

Issue of data clock

Ulong

4

H+160

26

toc

SV clock correction term (s)

Double

8

H+164

27

tgd

Estimated group delay difference (s)

Double

8

H+172

28

afo

Clock aging parameter (s)

Double

8

H+180

29

af1

Clock aging parameter (s/s)

Double

8

H+188

30

af2

Clock aging parameter (s/s/s)

Double

8

H+196

31

AS

Anti-spoofing on:
0= FALSE
1=TRUE

Enum

4

H+204

32

N

Corrected mean motion (radians/s)

Double

8

H+208

33

URA

User Range Accuracy variance, m2.

The ICD specifies that the URA index transmitted in the ephemerides can be converted to a nominal standard deviation value using an algorithm listed there. We publish the square of the nominal value (variance)

Double

8

H+216

34

Fit Interval

Curve fit interval:

0 = Ephemeris data are effective for 2 hours

1 = Ephemeris data are effective for more than 2 hours

Uchar

1

H+224

35

Reserved

Uchar

1

H+225

36

Reserved

Uchar

1

H+226

37

Reserved

Uchar

1

H+227

38

xxxx

32-bit CRC (ASCII and Binary only)

Ulong

4

H+228

39

[CR][LF]

Sentence terminator (ASCII only)

-

-

-