F03 (FSK and MFSK) and P03 (PSK) are Polish number stations that use a custom modem to send digital messages. First spotted in 2010.
Schedule
These number stations transmit twice weekly year-round UTC. They consist of 2 similar transmissions 5 minutes apart. Each day of the week usually has it’s own message that repeats every week and changes at the beginning of the next month. Null messages have never been sent in these modes.
Most digital transmissions are associated with E11 and S11a and are usually sent on the same days when they’re active as well.
There are 12 active variants of F03 and P03 with different emission modes.
Variants & Modes
| Variant | Modulation | Baud | Shift | Center | Period | Recording Sample |
|---|---|---|---|---|---|---|
| F03f | FSK | 400 Bd | 800 Hz | +1200 Hz | 496 bits | |
| F03i | FSK | 100 Bd | 800 Hz | +1200 Hz | 488 bits | |
| F03j | 4FSK | 100 Bd | 400 Hz | +1200 Hz | 448 bits | |
| F03l | FSK | 100 Bd | 200 Hz | +700 Hz | 448 bits | |
| P03e | QPSK | 100 Bd | +1000 Hz | 488 bits | ||
| P03f | QPSK | 200 Bd | +1000 Hz | 496 bits | ||
| P03g | BPSK | 50 Bd | +1000 Hz | 464 bits | ||
| P03h | BPSK | 100 Bd | +1000 Hz | 512 bits | ||
| P03i | BPSK | 62.5 Bd | +1000 Hz | 464 bits | ||
| P03j | QPSK | 100 Bd | +1000 Hz | 504 bits | ||
| P03k | BPSK | 100 Bd | +1000 Hz | 480 bits | ||
| P03l | QPSK | 100 Bd | +1000 Hz | 464 bits |
P03 Waterfall View
Numbers Station Summary
Enigma ID: P03 / F03
Activity: Active
Emission Mode: USB – FSK, 4FSK, BPSK, and QPSK
Location: Warsaw, Poland
Source
Priyom F03 / P03 Profile
Numbers and Oddities M42 Profile
