Just Sharing This My neighbors 12 meters away can't get this bird I can.

[SEOShamsher]

So I just realized something crazy while planning my polar mount build.

My location is literally 12 meters inside the geometric horizon limit for Dror 1 at 4°W the last satellite on my western arc. Twelve meters. That's it. My neighbor down the street is in a dead zone.


Once my polar mount is up I'm going for it going to see what actually comes through at this razor thin margin.

Has anyone else been this close to the horizon limit for their last trackable satellite?

 

[Analoguesat]

Remembet such cut offs are no more than theoretical and certainly wont be as defined as your diagram shows.

the birds move around inside their "centre of box" targets whch will move the absolute theoretical cut off dead zone a few km every few hours

you can get atmospheric effects bending the signals

you can get knife edge diffraction over hills


etc etc

 

[Channel Hopper]

Remembet such cut offs are no more than theoretical and certainly wont be as defined as your diagram shows.

the birds move around inside their "centre of box" targets whch will move the absolute theoretical cut off dead zone a few km every few hours

you can get atmospheric effects bending the signals

you can get knife edge diffraction over hills


etc etc

The other two factors are ,
the 'wobble' that all satellites have despite station keeping manoeuvres, gravitational and sunlight and
power fluctuations on the TWAs,

There will also be a different cutoff depending on the downlink frequency, something at 11GHz will be better received than a 12GHz mux.