Hi

In February of this year a local amateur radio operator contacted me about the Imet-54 radio sonde I had acquired back in 2018.

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I fried the poor little thing trying to reverse engineer it so never really got to finishing that quest, fortunately ZR6HVG(Hans) called me up and asked me about my prior sonde venture.

It was soon established that auto_rx can decode Imet-54 radio sondes.

I was quick to deploy a station and have been running a decoder ever since February of 2021.

These are all the balloon landings Ive decoded in that time

/data/1/2021/8/1628343762609.png

My system is a raspberry pi running DietPi and a RTL-SDR v3

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connected with some coax to a home made 403MHz Quarter Wave Ground Plane antenna made from some single core copper wire and a female BNC connector.

/data/1/2021/8/1628422416489.png

Here are some balloons from the past few days...

/data/1/2021/8/1628358629418.png

Here is one months worth of plots...

/data/1/2021/8/1628420728660.png

and here is everything since 8 February 2021

/data/1/2021/8/1628421757096.png

It also plots Skew-T

/data/1/2021/8/1628358705108.png

Here also is my reception coverage map

/data/1/2021/8/1628423606444.png

Regards

Ohan