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Author Topic: Unknown Radiosonde 402.3 MHz  (Read 1473 times)

Offline ChrisSmolinski

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Unknown Radiosonde 402.3 MHz
« on: June 09, 2017, 1718 UTC »
Heard in the mornings and evenings. Data seems to be 4800 baud. Any ideas? https://www.youtube.com/watch?v=y7P9yz-u5tw&feature=youtu.be
Chris Smolinski
Westminster, MD
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Offline ChrisSmolinski

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Re: Unknown Radiosonde 402.3 MHz
« Reply #1 on: June 09, 2017, 2138 UTC »
Turns out it is a Vaisala RS41.
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
NRD 545 / netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 670 ft horizontal loop / 500 ft northeast beverage / 58 ft T2FD / 300 ft south beverage / 43m / 20m / 10m  dipoles / Crossed Parallel Loop

Online sat_dxer

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Re: Unknown Radiosonde 402.3 MHz
« Reply #2 on: June 09, 2017, 2151 UTC »
Please provide the AOS and LOS times
Most times & frequencies posted are only an approximation.
Due to adulteration of the E.N.I.G.M.A. "designators" by others and not a match in the Conet Project they are never used.
-30-

Offline ChrisSmolinski

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Re: Unknown Radiosonde 402.3 MHz
« Reply #3 on: June 09, 2017, 2238 UTC »
I can do better than that  ;D

Signal acquired at 1307z 8 Jun 2017
Lost at 1434z, just before it landed, 492.5 meters altitude.

I will listen again tonight and try to record it starting earlier, maybe I can guess where it is coming from. If I can hear it. I see the flight path looks a lot like the launch from Sterling yesterday evening. So maybe that is where they launch these from also?




« Last Edit: June 09, 2017, 2251 UTC by ChrisSmolinski »
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
NRD 545 / netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 670 ft horizontal loop / 500 ft northeast beverage / 58 ft T2FD / 300 ft south beverage / 43m / 20m / 10m  dipoles / Crossed Parallel Loop

Offline Teotwaki

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Re: Unknown Radiosonde 402.3 MHz
« Reply #4 on: July 20, 2017, 1807 UTC »
Great catch! Any idea who is launching them?

I found a video of a teardown of the electronics package

https://www.youtube.com/watch?v=xSxtwuTS5hw
Jim
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76' end fed long wire & 66' off-center fed dipole for 10/20/40 meters
Orange County, SoCal, The better half

Offline Josh

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Re: Unknown Radiosonde 402.3 MHz
« Reply #5 on: July 24, 2017, 1622 UTC »
If anybody finds one of these thingys I'll give ya $5 for it!
Conveniently located near Vincennes Indiana.