Spectra-precision ProMark 800 Reference Manual Manual de usuario descargar pdf (Pagina 409)

100

101

397

Output Message Library

Reminder on How

to Output SAL

Messages

Use the $PASHS,RAW command with the syntax below:

$PASHS,RAW,SAL,<port_ID>,ON,<Rate>

For more details on the $PASHS,RAW command, refer to the

Set Command Library Chapter.

As an example, the command below will output SAL

messages on port A at a rate of 15 seconds:

$PASHS,RAW,SAL,A,ON,15

SAG: GLONASS Almanac Data

This message contains almanac data for one GLONASS

satellite.

The message is as follows:

$PASHR,SAG,<structure>

The message’s binary structure is described in the table

below.

Float Af1 4 Clock correction (sec/sec)

Short wna 2 Almanac week number

Short wn 2 GPS week number

Long 4 Seconds of GPS week

Unsigned

short

Check-

sum

The checksum is computed by breaking the

structure into 34 unsigned shorts, adding them

together, and taking the least significant 16 bits

of the result.

Total 70

Type Name Size Contents

Short prn 2 Satellite number 1-24

Short frq 2

Satellite GLONASS frequency number

[-7,…,6]

Short health 2 Satellite health 0=bad, 1=good

Float e 4 Eccentricity

Long 4

Reference day number (days in range 1 to

1461)

Float 4 Correction to inclination (semicircles)

Float w0 4

Longitude of first ascending node (semicir-

cles)

1 2 ... 404 405 406 407 408 409 410 411 412 413 414 ... 427 428

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