Well while we wait. I have not noticed this mention of Sanswire SAS-51 before? See page 35 <a href="http://tws01.terranovaws.it/osiris/doc/OSIRIS-WP5300-DEL-0045-Low%20Altitude%20Sensor.pdf" target="_blank">http://tws01.terranovaws.it/osiris/doc/OSIRIS-WP5300-DEL-0045-Low%20Altitude%20Sensor.pdf</a> - Have a good day Kevin