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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