Motorola M12 Oncore Guia do Utilizador descarregar pdf (Página 113)

Chapter 5 - I/O Commands

VISIBLE SATELLITE DATA MESSAGE (@@Bb)

Motorola Binary Format

Query Current Visible Satellite Data:

@@BbmC<CR><LF>

where:

m = mode 0x00 = output response message once (polled)

0x01 = output response message data when visibility data

changes (approximately once every 5-7 seconds)

C = checksum

Message length: 8 bytes

Response to above command:

@@Bbn iddeaas iddeaas iddeas iddeaas iddeaas iddeaas

iddeaas iddeaas iddeaas iddeaas iddeaas iddeaas C<CR><LF>

where:

n = number of visible sats 0 ..12

For each visible satellite, up to n fields contain the following valid data

i - satellite ID 1 .. 32

dd - Doppler in Hz -5000..5000

e - elevation in degrees 0..90

aa - azimuth in degrees 0..359

s - satellite health 0 = healthy and not removed

1 = unhealthy and removed

C = checksum

Message length: 92 bytes

*NOTE: The spaces in the response message shown above have been added merely to increase

readability. There are no embedded spaces in the actual message sent out by the M12+ receiver.

Motorola GPS Products - M12+ User's Guide Revision 6.X 09FEB05

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Motorola M12 Oncore Guia do Utilizador Página 113