negative elevation

hextejas

Newbie
Joined
Jun 25, 2020
Messages
4
I have inherited a satellite tracking program and told to make it work. Well, I am forging ahead but this is my 1st time into amateur radio (KG5TKY) and radio satellites.
Anyhow, the tracking software has an azimuth and elevation. What I dont understand is how the elevation can be a negative from where I am.
Houston, TX, essentially sea level.
That's a puzzle.
Thanks
 

RFI-EMI-GUY

Member
Joined
Dec 22, 2013
Messages
3,827
That's common and many programs have a setting to announce Aquisition of Signal AOS when the elevation becomes positive or above a user set minimum elevation. You might not have AOS below a certain EL because of trees or surrounding terrain.
 
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