ALMANAC STATUS
Motorola Binary Format
• Request Almanac Status Command:
@@Bd
mC<CR><LF>
m
mode
0 = Output status once (polled)
1 = Output status when RAM almanac data
changes (continuous)
C
checksum
Message Length: 8 bytes
• To above command:
@@Bd
vwtassssrrrrrrrrC<CR><LF>
RAM Almanac Status
v
almanac valid flag
0 = no almanac in receiver
1 = valid almanac in receiver
w almanac week number (raw) 0 .. 255 (
t time of almanac (raw) 0 .. 147 (
a
number of available SVs
0 .. 32
ssss
SVs in almanac
0 = SV not available
32 bit binary field,
1 = SV included
each bit represents one SVID
(msb = SVID 32; lsb = SVID 1)
rrrrrrrr reserved
C
checksum
Message Length: 23 bytes
45
Motorola GPS Products
M12 Oncore User’s Guide Supplement
Revision 1.0 01/25/00
Input Command
Response Message