PSAT is working very well. Plenty of energy. The PSK31 transponder is on all the time in AUTO mode as long as there are users in the 10m uplink passband. Doppler is a challenge for some stations depending on geometry to the pass.

Question? Have we had any success in PSK31 authors to include Doppler correction in their software?

KO6TZ provided a table summary of various PSK programs and their capabilities on the PSAT web page. Ideal satellite mode operations include operating full duplex and Doppler correction.

http://aprs.org/psat.html

If anyone has direct influence on any PSK31 authors, you might mention our needs for a Satellite mode that includes these features. PSAT has an estimated life of over 3 years.

Although PSK31 operation is primary, we have plenty of power, so the APRS digipeater (only 300 mW) is also on full time. In addition, we have activated PSAT’s own APRS position reporting, and with its position knowledge, it also has unique Bulletins for each Continent.

Take the positions with a grain-of-salt, however, since we have quirks in the onboard clock and have to frequently re-sync the clock to the real orbit. But we have ground stations in Maryland and Europe assisting in this.

Your best PSK31 Uplink opportunity with least Doppler change (so everyone else can decode you) is the highest elevation pass while coming towards you and then away from you.

You can see these stations in the waterfall with practically no Doppler change. Those uplink stations off to either side will have more and more changing Doppler during the pass.

Its fun to watch the waterfall ad visualize what is going on.

Bob, WB4APR