currently while gps message is parsed it overrides previously stored gps data.
we don't want to loose previous data if current message is invalid (this is in case we don't receive one radio message so it's safer to transmit last known good position instead of invalid gps data).
currently while gps message is parsed it overrides previously stored gps data. we don't want to loose previous data if current message is invalid (this is in case we don't receive one radio message so it's safer to transmit last known good position instead of invalid gps data).