<#part sign=pgpmime> On Wed, 22 Feb 2012 17:37:49 -0700, Ron Veale <[email protected]> wrote: > Hi list... > just recently joined. > > Haven't seen too much activity here, other than the restart discussion. > > Just bought a Telemetrum. One flight, worked great!
Yay! > Have a BeeLine GPS. Several flights. Works great! Yay! If you didn't know, Greg Clark is another OROC member; he and I regularly chat about our respective devices :-) > Have an interest in parsing further data from the GPS NMEA, in > particular VDOP or PDOP. VDOP in order to qualify the accuracy of the > altitude measurement. Ie something like "68% probability that the > altitude is within +/-20m". Just not sure at this time if that can be > claimed or would be accepted. Need data! The GPS device we're using filters altitude data, which causes some lag between actual and reported values. The result is that the GPS altitude data is generally 20-30 seconds behind the actual altitude data, so it's not terribly useful to record flight traces. The telemetry packet format includes spots for hdop, vdop and pdop -- currently only the hdop field is valid though as the firmware doesn't parse the GSA message. Should be pretty easy to add that. It would also be possible to record the precision data to eeprom as well, although it would take a new eeprom log packet format for that. > I need a couple more flights before suggesting other thoughts. > Should be fun! Let us know how you make out! -keith _______________________________________________ altusmetrum mailing list [email protected] http://lists.gag.com/mailman/listinfo/altusmetrum
