Sonde flew back to the launch site

[hb9tmc]

I have just observed this interesting launch:
A balloon was launched with two sondes, U3320871 and U3320828.

The first one detached at 30000 km altitude and flew back to the launch site, against the direction of the wind, with >200 km/h.

I wonder how they did that.

[wa7skg]

If it detached at over 18 thousand miles altitude it is in high earth
orbit and ain't never coming back.


hb9tmc wrote on 8/6/24 3:40 AM:

[Gavin Gill]

Maybe something like this?

Kind Regards,

Gavin G

Sent from my iPhone

On 6 Aug 2024, at 19:02, wa7skg <wa7...@wa7skg.com> wrote:

If it detached at over 18 thousand miles altitude it is in high earth

--
You received this message because you are subscribed to the Google Groups "radiosonde_auto_rx" group.
To unsubscribe from this group and stop receiving emails from it, send an email to radiosonde_auto...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/radiosonde_auto_rx/6cb7fe55-4c89-a6da-dd5d-483741da32fb%40wa7skg.com.

[andco95]

hi, look at : https://www.r2ho.me/

73's F5MVO

--
You received this message because you are subscribed to the Google Groups "radiosonde_auto_rx" group.
To unsubscribe from this group and stop receiving emails from it, send an email to radiosonde_auto...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/radiosonde_auto_rx/320dd8c0-d458-4810-a236-0cd17d7a2ae7n%40googlegroups.com.

[hb9tmc]

Yes, it appears to have been R2Home, impressive how well that works.
I wonder if this is becoming standard, and if not, why not.

[Mark Jessop]

Those Vaisala sensor stalks are *extremely* fragile... Given how many that are recovered are damaged in some way, I'd question how many sondes will actually be able to be re-used after such a return-to-home. Vaisala aren't interested in selling replacement sensor stalks.

Unfortunately the sonde returned today wasn't tracked well on the descent, so we don't have much in the way of data on the state the sensors were in when it landed.

73

Mark 

On Wed, Aug 7, 2024 at 7:42 AM hb9tmc <hb9...@gmail.com> wrote:

Yes, it appears to have been R2Home, impressive how well that works.
I wonder if this is becoming standard, and if not, why not.

--
You received this message because you are subscribed to the Google Groups "radiosonde_auto_rx" group.
To unsubscribe from this group and stop receiving emails from it, send an email to radiosonde_auto...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/radiosonde_auto_rx/074172f0-de45-4367-aa06-edad6f7f69b6n%40googlegroups.com.

[hb9tmc]

There were more R2Home flights today.
One from 30 km is currently ongoing (U3524364)
It seems that sondes on R2Home have a weaker signal, maybe 5-10 dB less.

[hb9tmc]

Todays R2Home flight was covered completely by their own auto_rx receiver.
U3544013
It looks like the temperature/humidity sensor broke during the landing.
But still impressive how precise that landing is. Peak velocity was 475 km/h.

[HB9EVW]

Hi,

I just joined the group and wanted to say that I also observed this interesting flight back to the launch site in Payerne!

I was also wondering how they did this! 

Thanks to all for the info!

vy 73s de hb9evw

(repeated the message to show my callsign!)