[amsat-bb] Need some information

I am trying to get back into working Satellites again after a hiatus of about 7 years. In trying to catch up, difficult to sort out the current landscape of what can be worked. So a couple of probably dumb questions for you guys who seem very much on top of the entire subject. - So where or how can I get a complete list of all the Sats that are currently workable with a full duplex FM HT setup? - in reading about the new CAS 4A &4B, it says they have linear transponders and it lists VHF and UHF frequencies for up & down-link. So is linear transponder a code word for SSB, can't be worked using an HT? - What exactly is a Linear Transponder?

Tnx & 73 Paul kc2nyu