RE: USA 245 orientation

My knowledge of imaging methods is superficial at best. If the spacecraft
is using the pushbroom method, then I believe that the spacecraft is
normally looking straight down at the Earth. Much has been written about
the subject. This paper seems like a good place to start.

https://ssed.gsfc.nasa.gov/IPM/2012/PDF/publications/1149.pdf

Ted Molczan

> -----Original Message-----
> From: Seesat-l <seesat-l-bounces_at_lists.seesatmail.org> On Behalf Of Scott Tilley via
> Seesat-l
> Sent: Wednesday, June 19, 2024 12:41 AM
> To: seesat-l_at_lists.seesatmail.org
> Subject: Re: USA 245 orientation
>
> Hi Felix
>
> Generally speaking the KHs maneuver to boost their orbit for minor
> maintenance purposes from time to time (usually on a Thursday :-) ) or
> in special cases to change how they are positioned within their plane as
> the mission ages and evolves. There are records within the group that
> expand on this and I invite Ted to speak further here.
>
> http://www.satobs.org/seesat/Sep-2011/0113.html
>
> If I understand your context, you appear to be asking why the view of
> the satellite from your perspective appears the same.  I suggest this is
> due to the fact that in most operational modes the spacecraft will just
> be house keeping especially over friendly territory where positional
> changes etc of the spacecraft's attitude will not be required for
> imaging and the more important to maintain standard communications and
> power headings.
>
> Regards
>
> Scott Tilley
>
> On 2024-06-18 15:49, Felix S. via Seesat-l wrote:
> > I assume these satellites would have to
> > maneuver when they observe a new target?
> >
>
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