From Signal Identification Wiki
NPM  |
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Frequencies |
21.4 kHz |
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Frequency Range |
21.4 kHz - 21.4 kHz |
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Mode |
CW |
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Modulation |
FSK |
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ACF |
— |
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Emission Designator |
— |
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Bandwidth |
300 Hz |
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Location |
United States |
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Short Description |
Naval Radio Transmitting Facility (NRTF) sends encrypted commands to submerged US naval submarines in the Pacific. |
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I/Q Raw Recording |
— |
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Audio Sample |
|
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