Use alternate altitudes if Baro altitude can not be derived from the ADSB message. Some TISB or MLAT messages do not provide the same altitude field as standard ADSB messages. If the preferred field is not available, substitute with what is available and add a remark to the CoT.
Use alternate altitudes if Baro altitude can not be derived from the ADSB message. Some TISB or MLAT messages do not provide the same altitude field as standard ADSB messages. If the preferred field is not available, substitute with what is available and add a remark to the CoT.