Keeping track of all satellites transmitting on ham radio frequencies can be hard and time consuming. The SatNOGS observations is a very good source to see the current active satellites.
- Go to https://network.satnogs.org/observations/
- Select a satellite – or select All
- If you are looking for satellites transmitting data telemetry – select Results – With Data
- Now select Update filters
No you get a list with current active satellite(s) with correct frequency and data mode. Of course this will not cover all satellites but all the popular sats are always present at SatNOGS.