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Logs summary

136

 MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1

This log contains the decoded almanac parameters from subframes four and five as received from the satellite with
the parity information removed and appropriate scaling applied. Multiple messages are transmitted, one for each
SV almanac collected. The Ionospheric Model parameters (

IONA

) and the 

UTC

 Time parameters (

UTCA

) are also

provided, following the last almanac records. For more information on Almanac data, refer to the GPS SPS Signal
Specification. (See Appendix F of this manual for References.)

MiLLennium cards will automatically save almanacs in their non-volatile memory (NVM), therefore creating an
almanac boot file would not be necessary.

$ALMA

prn

ecc

seconds

week

rate-ra

ra

w

M

o

a

f0

a

f1

cor-mean-motion

A

incl-angle

health-4

health-5

health-alm

*xx

[CR][LF]

1

$ALMA

Log header

$ALMA

2

prn

Satellite PRN number for current message, dimensionless

1

3

ecc

Eccentricity, dimensionless

3.55577E-003

4

seconds

Almanac reference time, seconds into the week

32768

5

week

Almanac reference week (GPS week number)

745

6

rate-ra

Rate of right ascension, radians

-7.8860E-009

7

ra

Right ascension, radians

-6.0052951E-002

8

w

Argument of perigee, radians

-1.1824254E+000

9

M

o

Mean anomaly, radians

1.67892137E+000

10

a

f0

Clock aging parameter, seconds

-1.8119E-005

11

a

f1

Clock aging parameter, seconds/second

-3.6379E-012

12

cor-mean-motion

Corrected mean motion, radians/second

1.45854965E-004

13

A

Semi-major axis, metres

2.65602281E+007

14

incl-angle

Angle of inclination, radians

9.55576E-001

15

health-4

Anti-spoofing and SV config (subframe 4, page 25) 

1

16

health-5

SV health, 6 bits/SV (subframe 4 or 5, page 25) 

0

17

health-alm

SV health, 8 bits (almanac)

0

18

*xx

Checksum

*20

19

[CR][LF]

Sentence terminator

[CR][LF]

1 - 19

$ALMA

Next satellite PRN almanac message

1 - 19

$ALMA

Last satellite PRN almanac message

1 - 11

$IONA

Ionospheric Model Parameters

1 - 11

$UTCA

UTC Time Parameters