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Re: AO-7 report.



John  - When AO-7 is powered all the time doesn't the on board  
housekeeping unit control the mode and switch between mode A and Mode B?

Having a full time Mode B LEO linear transponder is great, in my  
opinion, having a Mode A LEO one will be even better. - Duffey
On Jul 31, 2007, at 5:32 AM, John Hackett wrote:

A study of the AO-7 eclipse charts for the last 3 years shows a  
progression
toward non-elipse orbits in late 2007 - 2008.

In effect, this means that AO-7 in all probability will not change mode
unless anything untoward happens.

It also means that we appear to have a permanent mode-B LEO linear
transponder for the forseeable future ... providing operators follow the
recommended operating proceedure.

Please *do* decrease your power as the satellite approaches TCA to  
avaoid
FM'ing.

This not only helps the satellite, it helps the other operators in the
passband.

Don't be fooled by propagation anomolies. The mode-B transponder is  
working
well and will continue to do so providing the alligators go and play
somewhere else. Under normal circumstances you do NOT !! need a lot of
power. Please use only the necessary to maintain adequate  
communications. If
you can't copy people adequately, you should improve your receiving
capabilities rather than increasing your uplink power ... remember,
aluminium is cheap and it's a lot more user friendly to everyone  
concerned
.... with perhaps the exception of your neighbours.

For all intents and purposes, AO-7 is a QRP satellite. Please treat  
it as
such.

73 John.   <la2qaa@amsat.org>


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