[amsat-bb] ISS Contacts

Daniel Cussen dan at post.com
Mon Apr 6 21:00:29 UTC 2015

Info on frequencies here.


I think they also have a backup frequency that is not published. They
have had interference on both uplink and downlink in the past possibly
accidentally. The exact time of school contacts and normal downlink
frequency is usually very well advertised in the country where the
contact will take place.

Sometimes, including one recent contact in Italy they actually
re-attempted the contact at the next pass 90 minutes later as there
was interference. They try throw lots of power and gain on the uplink
in an attempt to drown out any accidental or low power interference.

On 06/04/2015, Daniel Estévez <daniel at destevez.net> wrote:
> El 06/04/15 a las 17:12, John Brier escribió:
>> fwiw, I do know not to interrupt during scheduled ARISS contacts. I
>> was telling someone else who responded to me that it was a good thing
>> they don't publish the uplink frequencies not only so people don't
>> intentionally try to take advantage of the situation, but also so
>> ignorant (and excitedly blind people like me) don't interfere.
> Sorry if this has been asked before, but are not the uplink frequencies
> 145.20 for region 1 and 144.49 for regions 2 and 3? Or do they use
> different uplink frequencies for scheduled contacts?

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