Re: Eclipsen set fra ballon
- From: "Erik Klausen" <ekl@xxxxxxxxxxxxxx>
- To: astrolist@xxxxxxxxxxxxx
- Date: Thu, 06 Dec 2012 10:01:09 +0100
Hej alle.
Den video er svær at stikke, hvad spektakularitet angår.
Til gengæld kan jeg byde over på kamerahøjden. Det følgende billede er
fra en geostationær vejrsatellit, og viser måneskyggen der rammer
Australien:
http://www.hjemmebedst.dk/2012_11_13_2100_MTSAT2_1_S4.jpeg
Det kan være lidt svært at se hvor på Jorden vi er, så her er det samme
billede, med kystlinier indtegnet:
http://www.hjemmebedst.dk/2012_11_13_2100_MTSAT2_1_S4_grid.jpeg
Billedet viser lys i området grøn til nær-infrarød.
Vh.
Erik Klausen
On 04/12/2012 12:37 "Stig Linander"<ast@xxxxxxxxxxx>wrote:
> Hej alle eclipse freaks,
>
> En gruppe rumænere sendte en ballon op i stratosfæren under den
> seneste totale solformørkelse i Australien.
>
> Det er der kommet en ret spektakulær video ud af:
> <http://www.youtube.com/watch?feature=player_embedded&v=W_9eYcGIT88>
>
> Joe Cali (og han havde godt nok mange jern i ilden i forbindelse med
> eclipsen) stod for at få de nødvendige tilladelser fra de australske
> myndigheder, og han skriver på Solar Eclipses Mailing List bl.a. ...
>
>
> Here is a slightly more detailed description of the footage and launch
> of our stratospheric balloon eclipse flight, Eclipser 1.
>
> If you haven't yet watched, I recommend you set quality to HD1080 and
> watch on a big screen but take a travel calm pill first :-) It's very
> Blair witch - quite the wild ride.
> I did not go to the launch and remained in Cairns to handle other tour
> group responsibilities and finish the CASA/Air Services Australia
> agreement.
>
> The payload was developed by the Romanian members of the team over the
> past 2 years. They conducted two test flights in October 2011 and
> August
> 2012 reaching altitudes of 35km and 29km respectively and thoroughly
> testing the tracking system and payload in the process. I became
> involved in May 2012 and the Cairns radio experts Howard Small and
> Samantha Scafe were contacted in September.
>
> The team left Cairns (Trinity Beach) early on the morning of Tuesday
> 13th Nov and made their way out to Kimba during the day. The final
> approval and letter of agreement (communication protocols we agreed to
> follow) with Air Services Australia was only finalized after midday
> Tuesday. I was at Trinity Beach where I received the final draft at
> 1400
> signed it and sent it back to them. I then emailed a copy to Sam
> Scafe,
> one of our radio experts, who had radiophone/satphone/internet
> capabilities in her 4wd vehicle. At approximately 9pm, I received a
> call
> from the team to say they were on site and confirming they had
> received
> the protocol. I went over the checklist of requirements with Florin
> Mingireanu. Next check in with air traffic control was due 6hrs before
> launch 2315hrs that night, another when they began filling the balloon
> and another just before launch.
>
> The balloon was launched about 10-15mins before sunrise. I don't know
> the exact time but it would have been approximately 0522hrs local. The
> balloon lift rate was 5.4 metres per second and the launch site was
> approximately 170m altitude.
>
> Here is the link to the balloons APRS tracking above 11000m altitude.
> This was broadcast live during the flight and used by Air Services
> Australia to track the position in addition to the periodic call ins
> to
> air traffic control as the balloon crossed each 10000 foot altitude
> multiple.
>
> <http://aprs.fi/#!call=a%2FYO4SJI-11&timerange400>
>
> The balloon moved over a footprint of approximately 30km x 30km moving
> at speeds of around 80km/hr.
>
> Key altitudes are :
> TIME(LOCAL) ALTITUDE (metres) EVENT
> 0522 170 LIFT OFF
> 0553 10000 Eclipser1 reachestypical height of
> international passenger jets
> 0618 18200 Eclipser1 reaches upper limit of
> controlled air space
> 0639 25000 Eclipser1 images umbra and totality
> 0715 36800 Eclipser1 reaches burst altitude
>
> After the eclipse, it continued to rise to a maximum altitude of
> 36800m(121000ft) which we believe is the third highest flight recorded
> in Australian airspace.
>
> Just before the 2 minute marker, the camera swings around to the west
> and you see the penumbra then the umbra approach. The camera
> fortuitously pans around facing a little downwards following the umbra
> across the cape and as the sun swings into view you see totality
> begin.
>
> At 2:40 the camera swings to the west and you see the receeding edge
> of
> the umbra break over the horizon as a small line of sunlight appears
> and
> breaks the long shadow.
>
> The Moon's shadow is clearly visible traveling out to sea for some
> time
> after the end of totality at Eclipser1's location. The balloon
> continues
> its ascent for 35,minutes after the total eclipse to its maximum
> altitude of 36800m then bursts. At burst altitude the temperature is
> about -80C and pressure <1% of sea level so when the latex balloon
> bursts, it is so brittle that it shatters into thousands of small
> shards
> of rubber that go flying in all directions with almost no air to slow
> them down.
>
> After the explosion, you see the capsule tumbling as it free-falls for
> 19000m from 37000m down to 18000m. Then at 18000m altitude a pressure
> switch deploys a parachute and it comes back to earth. Of course, the
> chute got snagged 20m up in a tree posing one final hurdle for the
> recovery team.
>
> <http://www.youtube.com/watch?feature...&v=W_9eYcGIT88>
>
> The team responsible for the project included : -
> Catalin Beldea, the developer, astronomer at Science & Technology,
> Romanian eclipse chaser
> Florin Mingireanu, ROSA researcher and engineer in aerospace
> technology,
> Romanian Space Agency (ROSA)- Public organization by Romanian Govt.
> Decision 923/1995;www.rosa.ro
> Marc Ulieriu, editor Science & Technology
> Adrian Florescu, president amateur radio club YO3KSR
> Joe Cali, legal compliance, protocols, approvals and Liaison with CASA
> and Air Services Australia Air Traffic Control in Cairns and Brisbane.
> Logistics support.
> Howard Small, specialist tracking radio, amateur radio club president
> in
> Cairns, Queensland, Australia
> Samantha Scafe, radio tracking specialist
>
> The Eclipser1 project was conducted by the Romanian Space Agency ROSA,
> YO3KSR amateur club and one in Cairns and supported by Duracell and
> Stiinta si Technica Magazine in Romania.
>
> We would also like to gratefully acknowledge the assistance provided
> to
> us during the lead up to launch by Professor Michael Bird and his
> staff
> at James Cook University, Cairns.
>
> Joe Cali
>
>
Other related posts:
