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Re: new sat



how does the gps birds work ??? Thanks for the info.. I am going through a big
learning curve with this and I am under no illusion as to thinking that this is
something I could design or get launched but I can foster ideas and help raise
money to make it real....

        thank you

        guy lemke
        kd6mtu

"Richard D. Burgan" wrote:

> Guy,
>
> The hard part (as with any satellite) will be getting it into orbit.  How
> would you get it into the orbit you propose?  There aren't many (if any)
> satellites in a 10000 mi equatorial orbit.  If you went for a synchronous
> transfer orbit you would need an engine.  That won't fit in a microsat
> frame.  You need to do the calculations on the transponder.  What kind of
> directional antennas will you have?  How will you point them?  The microsat
> orientation system will probably not work at 10000 miles and you don't get
> close to the magnetic poles.  The closest orbit that I can think of is a GPS
> satellite.  To simulate some keps' try changing the elements for a GPS
> satellite inclination to 5.0 degrees and the mean motion to 4.0
> revs/day.  That should give you something to experiment with.
>
> 73's de Rich Burgan @ WC8J
>
> ----
>
> guy lemke wrote:
>
> > I purpose a new satellite with an orbital parameters of:
> >
> >     1.    Average altitude of 10,000 miles
> >
> >     2.    5 degrees above the equator in a equatorial orbit this will
> > give good coverage
> >
> >     3.    Use the microsat structure for the space frame
> >
> >     4.    Two transponders one in cold storage for backup.. both of them
> > in the U/S bands.
> >             435 up 2.4 down. in the 5 to 10 watt output range
> >
> >     5.    5 to 6 Dbd gain antennas for both bands
> >
> >     6.    Solar cells with a high efficiency rating both startup and
> > long life
> >
> >     7.    Use the microsat attitude stabilization and control if
> > possible
> >
> > Can some one produce keps for this type of orbit ??? and post them... Is
> > any one interested???
> >
> >             guy lemke
> >             kd6mtu
> >
> > ----
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