Frequencies are 3.5975, 7.095, 14.095, 18.1025, 21.095, 28.095 kHz and 147.555 MHz.
Bulletins are sent at 45.45-baud Baudot, PSK31 in BPSK mode and MFSK16 in a daily, revolving schedule.
The regular callup will be made using the mode that is transmitted first. The digital bulletin times remain at 6 PM and 9 PM eastern, daily.
The Tuesday and Friday Keplerian data bulletins will continue to be sent using just Baudot and PSK31.
The digital schedule is as follows:
Monday: Baudot, PSK31, MFSK16
Tuesday: PSK31, MFSK16, Baudot
Wednesday: MFSK16, Baudot, PSK31
Thursday: Baudot, PSK31, MFSK16
Friday: PSK31, Baudot, MFSK16
Given time constraints and bulletin lengths, all three modes may not always be transmitted.
Keplerian elements for many amateur satellites will be sent on the regular digital frequencies on Tuesdays and Fridays at 6:30 PM Eastern Time using Baudot and PSK31.