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Garmin 010-00625-00 - Mobile - For BlackBerry Specyfikacja techniczna

Satellite Data Record

The satellite data has a record ID of 0x72 with 84 (0x54) data bytes. The data bytes contain the data for the

12 channels as described below. For each satellite, the following data is available:

typedef

struct

{

uint8

svid;

uint16

snr;

uint8

elev;

uint16

azmth;

uint8

status;

} cpo_sat_data;

The status bit field represents a set of booleans described below:

Bit

Meaning when bit is one (1)

The unit has ephemeris data for the specified satellite.

The unit has a differential correction for the specified satellite.

The unit is using this satellite in the solution.

This pattern is repeated for all 12 channels for a total of 12 X 7 bytes = 84 (0x54) bytes :

typedef

struct

{

cpo_sat_data

} cpo_all_sat_data

The RS-232 Packet for the Satellite Record looks like:

- 0x10

(DLE is first byte)

- 0x72

(Record ID – single byte)

- 0x54

(Number of data bytes – single byte)

- cpo_all_sat_data

- 0x##

(2's complement of the arithmetic sum of the bytes between the delimiters)

- 0x10

(DLE)

- 0x03

(ETX is last byte)

The USB Packet for the Satellite Record looks like:

INDIAN - Thailand, Vietnam

- 0x72

(Record ID – single byte)

- 0x54

(Number of data bytes – single byte)

cpo_all_sat_data

190-00769-00

//space vehicle identification (1-32 and 33-64 for WAAS)

//signal-to-noise ratio

//satellite elevation in degrees

//satellite azimuth in degrees

//status bit-field

GPS 10x Technical Specifications

Page 14

Rev. A