RoyalTek REB-3000 - Manual (Page 45)

RoyalTek RGM-3000/REB-3000
GPS Module Operational Manual)
40
Visible List – Message I.D.13
Output Rate:Updated approximately every
2minutes. Note – This is a variable length
message. Only the number of visible
satellites are reported(as define by visible
Svs in Table 55), Maximum is 12 satellites
Example:A0A2002A – Start Sequence and
Payload Length
0D080700290038090133002C*************
****** - Payload
****B0B3 – Message Checksum and End
Sequence
Table 55 Visible List
Binary(Hex) ASCII(Decimal)
Name Bytes Scale Example Units Scale Example
Message ID 1 0D 13
Visible Svs 1 08 8
CH 1 –Sv I.D 1 07 7
CH 1 –Sv Azimuth 2 0029 Degrees 41
CH 1 –Sv Elevation 2 0038 Degrees 56
CH 2 –Sv I.D 1 09 9
CH 2 –Sv Azimuth 2 0133 Degrees 307
CH 2 –Sv Elevation 2 002C Degrees 44
……
Payload Length:62 bytes(maximum)
Almanac Data – Message I.D.14
Output Rate:Response to poll
Example :A0A203A1 – Start Sequence
and Payload Length
0E01************* - Payload
****B0B3 – Message
checksum and End Sequence
Table 56 Visible List
Binary(Hex) ASCII(Decimal)
Name Bytes Scale Example Units Scale Example
Message ID 1 0E 14
Sv I.D.(1) 1 01 1
Almanac Data[14][2] 28
….
Sv I.D.(32) 1 20 32
Almanac Data[14][2] 28
Payload Length: 929 bytes(maximum)
OkToSend - Message I.D. 18
Output Rate: Trickle Power CPU on/off indicator
Example:
A0A20002—Start Sequence and Payload Length
1200—Payload
0012B0B3—Message Checksum and End Sequence
Table B- 52 Almanac Data