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Decoding of E1P telemetry data


13:00 UTC 17 deg pass over Europe

33 72 05 02 4B 37 4D 53 55 2D 31 20 09 20 08 00 84 02 0D B4 75 00 01 00 02 29 0C 31 30 90 90 BB 00 0F F0 0F 05 02 06 0C 20 68 60 09 0C 07 15 02 1A 08 80 68 A0 07 D9 0B 37 40 06 18 14 53 21 02 66 02 70 E8 EA 53 00 F4 A0 00 00 00 00 00 00 00 9F 02 58 35 35 35 35 35 35 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00

33 72 05 02 4B 37 4D 53 55 2D 31 20 09 20 08 00 84 02 0D CB 31 00 01 00 02 29 0C 31 30 90 90 BB 00 0F F0 0F 05 03 4B 0C 40 69 80 0B 30 07 15 02 1D 08 A0 69 A0 0A 7D B9 0D B2 06 07 05 57 21 02 66 02 70 E9 EA 57 56 D7 DA A0 00 00 00 00 00 00 00 9F 02 58 35 35 35 35 35 35 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00

33 72 05 02 4B 37 4D 53 55 2D 31 20 09 20 08 00 84 02 0D E1 ED 00 01 00 02 29 0C 31 30 90 90 BB 00 0F F0 0F 05 03 4B 0C 40 69 20 0B 13 07 15 02 1D 08 C0 69 60 08 91 07 64 15 90 23 0A 52 20 02 67 02 70 E8 EA 59 59 F7 A0 00 00 00 00 00 00 00 9F 02 58 35 35 35 35 35 35 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00

It’s easy to decode the E1P AFSK signal. It’s important to use mode LSB or USB. At the moment it’s a bit tricky to find the right decoding frequency by manually tuning. It will be much easier if correct TLE are available.
So you have to be fast and tune during the tracking tone exactly to 1200 Hz (USB) or 2200Hz (LSB). If you use MixW (mode 1k2 AFSK standard) you have to select the TNC terminal emulation with an additonally COM port bridge driver. Use one end of the port bridge as TNC terminal in MixW, the other one in the E1P decoder software.

Bandwidth of a E1P signal


The bandwidth of the E1P transmission is rather wide. I assume 30..40 KHz (20 dB).







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