ESEO

ESEO 9k6_GFSK telemetry analysis


Andy, UZ7HO said you should tune your radio -4800hz below the carrier,
and I, JE9PEL confirmed this IQ.wav file had the highest decoding
possibility at 436.987 MHz below -7 kHz carrier. (1st Jan 2019)

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Re: ESEO strong IQ.wav
From: Andy UZ7HO
To: JE9PEL
Date: Mon, 31 Dec 2018 17:39:16 +0300

Hello Mineo!

Yes I have been decoded this file.
You should tune your radio -4800hz below the carrier,
436.9892 MHz.  Look the image.

tuning.jpg, 31122018_1431.dmp, 31122018_1431.kss

------------------------
Subject: Happy New Year!
From: JE9PEL
To: UZ7HO
Date: Mon, 31 Dec 2018 22:35:38 +0900

I saved the strong ESEO_9k6 on 31 Dec 2018.
Can you decode it using New_Soundmodem?
This wav file will be replayed at 436.994 MHz. 
(IQ.wav 30sec.)

SDRSharp_20181231_123947Z_436970000Hz_IQ.wav

JE9PEL, Mineo Wakita
------------------------


  je9pel_31122018_2341.kss


I found the reason "It can be decoded at -5 kHz lower tuning below the carrier"
that UZ7HO said. Looking of the reception figure below which received me on
2 Jan 2019, it will be decoded at that moment when the signal began to hear
in Soundmodem. You can see 9k6 spectrum in the FFT of SDR# at the beginning
of the signal. It's the red arrow part in the figure below.

The red vertical line at the center of the 16 kHz width filter is -5 kHz lower
tuning below the carrier. In other words, it was decoding 9k6 in Soundmodem
when I put the red vertical line at 436.9958 MHz in SDR# FFT in the case of
the figure below. It meant that it was "-5 kHz lower tuning".


  SDRSharp_20190102_124605Z_436980000Hz_IQ.wav


ESEO New_Year

AOCS telemetry
General telemetry


31 Dec 2018
2 Jan 2019

[Reference]
http://www.esa.int/Education/ESEO/ESEO_student_satellite_successfully_launched_to_space
http://funcubetest2.files.wordpress.com/2018/11/eseo_downlink_data_1_21a.pdf
http://www.esa.int/Education/ESEO/Be_the_first_to_catch_a_signal_from_ESEO
http://directory.eoportal.org/web/eoportal/satellite-missions/e/eseo
http://download.funcube.org.uk/ESEO_Dashboard_v1177.msi
http://amsat-uk.org/satellites/communications/eseo/
http://destevez.net/2018/12/decoding-eseo/
http://www.dk3wn.info/p/?p=91603