SAS2
From Signal Identification Wiki
 | |
|---|---|
| Frequencies | 42.5 kHz |
| Frequency Range | 42.5 kHz - 42.5 kHz |
| Mode | — |
| Modulation | MSK |
| ACF | — |
| Emission Designator | — |
| Location | Sweden |
| Short Description | Swedish navy transmitter for submarine communication |
| I/Q Raw Recording | — |
| Audio Sample | |
SAS2 is activated less often as the other Swedish transmitters used for VLFVery Low Frequency (3-30 kHz) submarine communication. Usually, it works with reduced power.
Swedish MSKMinimum-Shift Keying (When Shift/Bd = 0.5. It is impossible to get this ratio to be lower than 0.5, hence it is called the 'Minimum' shift.) transmitters can easily be identified in the waterfall diagram by their fishbone-like modulation pattern. This seems to belong to the idle phases where no data are transmitted.
The fishbone pattern is even audible as a characteristic modulation.
