Re: NRO "Trumpet" visibilty

Tony Beresford (
Fri, 05 Sep 1997 21:08:39 +0900

At 06:16 5/09/97 -0500, you wrote:
 What is fascinating about this is the possibility that this
>satellite might sport a 300-foot diameter sigint antenna.  
>Anyone have any thoughts on this?
Hi there Robert,
I think you will find such an antenna is nowhere near solid,
for both air-drag and solar radiation pressure reasons, both of which
would introduce difficult forces in a pointing control situation, so its
optical cross-section will be a lot smaller. Do they give figures for
the perigee height, or the radio bands its designed for?
tony Beresford.