"Scott Daniells" no.thanks wrote in :

Try the following frequencies. They are used from when the crew enter
the shuttle until about 2 hours after launch, and again from 3 hours
before landing until they finally land.

259.7 (AM) - Shuttle Air-Ground Primary - This is the only frq I've
heard the shuttle on out of the Standard shuttle FRQs but it's worth
monitoring the others too
296.8 (AM) - Shuttle A-G Backup and also Orbiter - Suit during spacewalk
279.0 (AM) - Shuttle A-G Backup and Suit - Suit and Suit - Orbiter

I've also been recommended to listen to 251.875

I've heard discovery trying to contact ISS on their frequencies while on
orbit before... so worth checking these:

143.625 (NFM) - VHF1
130.167 (NFM) - VHF2
121.75 (NFM) - Low Power backup
139.208 (NFM) Backup FRQ for VHF 1 but I've never heard it used

The Kvant System on ISS uses the followinf frequencies and is
occasionally used for voice downlink according to some lists:
922.76 (NFM)
768.975 (NFM)

-Scott


You can add 145.800, the downlink frequency for amateur radio
communications from the ISS.