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D

Logs summary

MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1

159

This log outputs raw almanac data for each satellite 

PRN

 contained in the broadcast message. A separate record is

logged for each 

PRN

, up to a maximum of 32 records. Following a GPSCard reboot, no records will be output until

new broadcast message data is received from a satellite. It takes a minimum of 12.5 minutes to collect a complete
almanac following GPSCard boot-up. (The almanac reported here has no relationship to the NovAtel $

ALMA

almanac injection command. Following a cold start, the log will output null fields until a new almanac is collected
from a satellite.)

$GPALM,17,17,28,653,00,3EAF,87,0D68,FD30,A10CAB,6EE732,525880,6DC5A8,009,
005*37[CR][LF]

1

 Variable length integer, 4-digits maximum from (2) most significant binary bits of Subframe 1, Word 3

reference Table 20-I, ICD-GPS-200, Rev. B, and (8) least significant bits from subframe 5, page 25, word 3
reference Table 20-I, ICD-GPS-200, Rev. B, paragraph 20.3.3.5.1.7

2

 Reference paragraph 20.3.3.5.1.3, Table 20-VII and Table 20-VIII, ICD-GPS-200, Rev. B 

3

 

Reference Table 20-VI, ICD-GPS-200, Rev. B for scaling factors and units.

To obtain copies of ICD-GPS- 200, see Appendix F, Standards and References, Page 233, for address information.

$GPALM

# msg

msg #

PRN

GPS wk

SV hlth

ecc

alm ref time

incl angle

omegadot

rt axis

omega

long asc node

M

o

a

f1

*xx

[CR][LF]

1

$GPALM

Log header

$GPALM

2

# msg

Total number of messages logged

x.x

17

3

msg #

Current message number

x.x

17

4

PRN

Satellite PRN number, 01 to 32

xx

28

5

GPS wk

GPS reference week number

1

x.x

653

6

SV hlth

SV health, bits 17-24 of each almanac page

2

hh

00

7

ecc

e, eccentricity

3

hhhh

3EAF

8

alm ref time

toa, almanac reference time 

 

3

hh

87

9

incl angle

(sigma)i, inclination angle 

  

 

3

hhhh

OD68

10

omegadot

OMEGADOT, rate of right ascension 

3

hhhh

FD30

11

rt axis

(A)

1/2

, root of semi-major axis   

3

hhhhhh

A10CAB

12

omega

omega, argument of perigee 

   

3

hhhhhh

6EE732

13

long asc node

(OMEGA)

o

,longitude of ascension node 

   

 

3

hhhhhh

525880

14

Mo

Mo, mean anomaly 

   

 

3

hhhhhh

6DC5A8

15

af0

af0, clock parameter 

 

3

hhh

009

16

af1

af1, clock parameter 

  

 

3

hhh

005

17

*xx

Checksum

*hh

*37

18

[CR][LF]

Sentence terminator

[CR][LF]