EOS1 (Edge of Space 1)

[jonpetter88]

@jeer2010 Hehe, det var nok noe ironi i utsagnet, men allikevel; jeg skrev ikke at dette var en stor begivenhet. Jeg skrev at det var den største begivenheten, samme hvor liten den største måtte være. Dette var nettopp for å understreke hvor lite slik aktivitet vi har på østlandet. Makshøyden er faktisk under en tredel av Kármán-linjen, men allikevel nærmest ;) Uansett, takk for at du så på klippet!

[ztabilo]

Hvor fikk dere tak i ballongen? Var den dyr?

[jodanvids]

That is such a cool idea! Pretty good for being an amateur project.

[jonpetter88]

That's nice to hear. Thank you! :)

[rakokako]

På videon på ca. 3.55 og litt mere. Hvor høyt oppe er det egentilig da, virker nesten som man ser selve jordet, virker som ballongen er langt oppe i verdensrommet?

Hvor stor Geografisk del av norge ser man på 4.11!

[jonpetter88]

Ved 3:55 og utover kan de tilsynelatende virke som om man ser kraftig jordkrumning osv. Dette er en optisk illusjon, da kameraet som peker nedover er svært vidvinklet. Som med alle ekstreme vidvinkellinser fører det til at rette linjer i ytterkantene av bildet blir buet. Horisonten i 20 kilometers høyde (cirka høyden ved 4:11) er 500 km, dvs. at det teoretisk skal være mulig å se danmark i ytterkanten av bildet. Dette stemmer som du ser ikke med praksis. Det du ser er godt og vel hele østlandet.

[rakokako]

hva er den stadion man ser på 3:00? Er det ullevål?

[jonpetter88]

Jepp, det stemmer. Senere ser man også Bjerke travbane, men la merke til at jeg har klippet bort det i denne versjonen (ble for lang).

[VA2SG]

Very interesting. Gives me ideas for portable SSTV next summer. If we could only have more sunspots.

[jonpetter88]

Thanks! I actually had a similar idea before EOS1; a 20M QRP-transmitter connected to a Kenwood VC-H1 for 20M SSTV-operation from near space. Would have been pretty cool.

[chrispanama]

That was amazing bro!! Good job! HEy I was wondering if it is possible to extend the radio frequency of a radio control airplane and it's wireless camera at the same time... check out on youtube the easystar first person view videos... they only go as far as 1000 ft, it would be nice to extend the range =) so, what do you think, is it possible?? thanks bro

[jonpetter88]

Hi. Thats an interesting question. I'm into FPV myself, currently building a Multiplex TwinStar II. My solution is to use 2.4GHz for radio control, and mount an external patch antenna on the transmitter (DX7), similar to those used for 2.4GHz video. This greatly extends the range. For video I use a 1W 23cm (1.2GHz) transmitter - only legal as a licenced radio amateur, of course with good transmitter and receiver antennas.

[ivanatora]

Everything is awesome!

I just don't understand what are you using the cell phone for (Siemens S55)? At such height of 30km I suppose no cell can be connected.

And the long wire the whole ballon was connected on? Did you pull it back to Earth with it? Or it was just to be sure it won't fly to China. Can you use that wire for communication?

[jonpetter88]

Thank you! The cell phone is just used to communicate with the payload when it has landed and is out of range of the video receiver (to get the coordinates at the landing site for recovering the payload). The "wire" hanging under the payload is only a nylon rope which is about 10 meters long, and should not have been hanging there. It is the same rope connecting the payload and the balloon, which was supposed to unwind slowly, but the mechanism got messed up just a few seconds into launch.

[ivanatora]

Huh, I was sure there is about 30km rope hanging to your hands to make sure the baloon won't fly too far when it lands. I'm curious - at what distance did it land? :)

So I see you have GPS module - when it lands it is out of range for radio transmission, but you transmitted the GPS data over the cellular network?

[jonpetter88]

If the rope should have been capable of stopping the balloon from rising at any point, it must have been so thick the balloon would not have enough lift to hold a 30km piece of this rope. The rope must be pretty strong just to hold its own weight. The payload landed 80km from the launch point. You're right about the GPS-positioning. The 2.4GHz receiver lost the signal before descent, so after about an hour without any communication, the GPS-data was transmitted through the cellphone.

[Tuputtamalder]

Could someone to tell me what is the name of the song?

[jonpetter88]

The first song is "Planet Funk - Where is the Max" and the second one is "De Phazz - Free Drift".

[jamiedoozer]

awesome. well done.

[jonpetter88]

Thanks! :)