[aprssig] Help for course/speed/altitude etc HF APRS

[Curt Mills]

On Sun, 29 Apr 2007, Jack Chomley wrote:

> In my case, the TM1+ can look for the header ($GPRMC) and I then either set
> the sentence length or termination character and it will be sent out the radio
> port at intervals set by my Tx timer value.

You originally stated that you wanted speed/course/altitude.

If you transmit the GPRMC sentence you'll only have
time/position/speed/course sent out.

If you choose GPGGA instead, you'll be sending
time/position/altitude.

Many TNC's that can send Standard APRS, Mic-E Compressed, or Base-91
packets allow you to select which of the speed/course/altitude
parameters to send, and can send them in every packet.

-- 
Curt, WE7U.				archer at eskimo dot com
http://www.eskimo.com/~archer
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