[MRCA] Radiosondes

[Ray Fantini]

Went back and looked, have a picture of the tracker dish.

Ray F/KA3EKH


________________________________
From: mrca-bounces at mailman.qth.net <mrca-bounces at mailman.qth.net> on behalf of Ray Fantini via MRCA <mrca at mailman.qth.net>
Sent: Tuesday, October 6, 2026 4:12 PM
To: mrca at mailman.qth.net <mrca at mailman.qth.net>; Al Klase <ark at ar88.net>
Subject: Re: [MRCA] Radiosondes


It's amazing all the ways you can waste time on the internet! Before Fair Radio closed shop, they had a four- or five-foot dish on a tripod with a receiver built onto the back. Assume most people thought it was a radar dish and when I went and looked at it up close saw it was an automated tracker for what I would think was weather ballons being it was like 403 or 405 MHz
Completely unrelated but years ago I set up a system for capturing the old APT satellites on 137.5 MHz and just the other day had someone ask what the circularly polarized antenna and down converter they had picked up was for, along with seeing a lot of that old VHF stuff turn up but as far as I know that entire network is gone now with them pulling the plug on NOAA-15 last year.

Ray F/KA3EKH




________________________________
From: mrca-bounces at mailman.qth.net <mrca-bounces at mailman.qth.net> on behalf of Al Klase via MRCA <mrca at mailman.qth.net>
Sent: Monday, October 5, 2026 8:08 PM
To: mrca at mailman.qth.net <mrca at mailman.qth.net>
Subject: Re: [MRCA] Radiosondes

Fascinating!

73.
AL

On 05/10/2026 7:28 PM, Tim via MRCA wrote:
Speaking of Sondes....Here's a link to current radiosonde weather balloon ops worldwide.  They are at-altitude at 0000Z and 1200Z daily.  They actually launch about 45-60 minutes before that.  Major airports are the usual launch sites.
The ones out west here are RS41's that operate at 404 MHz, around 60 mw and I can receive the basic telemetry from a LONG distance away. Click on your local balloon and it shows all the data including its GPS coord's, current altitude, temp etc.
Plot shows the track and predicted future track.  They usually get up to around 100,000' AMSL, often higher before they burst.  Then a long ride down on a parachute.  (fun fact:  from 105,000' the parachute has NO initial effect on the fall rate...very little air up there... LOL)
Enjoy! https://sondehub.org/
Tim
N6CC

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