On Mar 17, 9:22*am, Darryl Ramm wrote:

I worry about how well we will have ADS-B ground station coverage
along busy low-level routs like major ridge soaring locations, the
white mountains etc. Without that, gliders with UATs and 1090ES will
not see each other.

Darryl,

Was I mistaken in taking from the survey that ADS-B supports aircraft-
to-aircraft position reporting without a ground station repeater? I
figured that would allow two gliders in any remote location to see
each other if they both had ADS-B transceivers (like the Mitre unit).
With ground stations you then should get position reporting between
transponder and ADS-B.

I figured any collision avoidance advice would be a function of on-
board software capability, not constrained by the means of position
reporting - as long as you know your position and track and a target's
position and track, shouldn't you be able to figure out the collision
avoidance part?

It seems to me that you should be able to design ADS-B such that you
no longer need transponders. What did I miss?

9B