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M12 Oncore Users Guide Supplement - deetc - isel

M12 Oncore Users Guide Supplement - deetc - isel

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Input Command<br />

Response Message<br />

Motorola GPS Products<br />

<strong>M12</strong> <strong>Oncore</strong> User’s <strong>Guide</strong> <strong>Supplement</strong><br />

Revision 1.0 01/25/00<br />

SELECT DATUM<br />

Motorola Binary Format<br />

• Poll current datum ID code:<br />

@@AoxC<br />

x 1 out of range byte $ff<br />

C checksum<br />

Message length: 8 bytes<br />

• Change current datum ID code:<br />

@@AodC<br />

d datum ID 49 or 50<br />

C checksum<br />

Message length: 8 bytes<br />

• To either command:<br />

@@ApdsssffiiffffxxyyzzC<br />

d datum ID 49 or 50<br />

sssff semi-major axis (m)<br />

sss integer part 6,000,000 .. 7,000,000<br />

ff fractional part 0 .. 999 (0.0 .. 0.999)<br />

iiffff inverse flattening<br />

ii integer part 285 .. 305<br />

ffff fractional part 0 .. 999,999,999 (0.0 .. 0.999999999)<br />

xx delta X (0.1 m) -32,768 .. 32,767 (-3276.8 .. 3276.7)<br />

yy delta Y (0.1 m) -32,768 .. 32,767 (-3276.8 .. 3276.7)<br />

zz delta Z (0.1 m) -32,768 .. 32,767 (-3276.8 .. 3276.7)<br />

C checksum<br />

Message length: 25 bytes<br />

19

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