ESTCube vastuvõtt

[ES6DO]

Tere! Küsimus Pauhhile: kas tellisid Arrow-i otse Ameerikast või on neid ka kuskilt Euroopa turult saada? Oleksin ka sellisest huvitatud!

Jah mina tellisin otse USA,st http://www.arrowantennas.com/arrowii/146-437.html
Koos posti ja tolliteenuse+impordimaksuga tuli ühe antenni tüki hinnaks 170€
Euroopast igatahes edasimüüjat ei leidnud

Täpsemalt tellisin Ebay,st: http://www.ebay.com/itm/ARROW-ANTENNA-H ... 565571a186

Njah, antenn on kena ja tundub, et töötab tip-top. ADF-i signaal on stabiilselt 57-59. Aga 170 eurikut on ikka kuradi soolane hind. Kui sellise raha eest ostjaid oleks, meistertaks isegi 3-4tk kuus valmis.

Muuseas, mina töötan vanemat tüüpi TV logaperioodilisega. See, millel 5 elementi pikemad olid. Neid müüdi siis, kui meie TV saatjad veel 1-12 kanalini töötasid. Väike modi sai tehtud, et need 5 elementi resoneeruks 145 peal. SWR on 1.1 ringis nii 145 kui 436 peal.

[digivend]

ESTCube jäi ellu, seda tuleb tähistada!

[ES6DO]

ESTCube jäi ellu, seda tuleb tähistada!

Vaara h6isata.kuubik lendab veel "prygimae" kohal

[ES7GN]

ESTCube jäi ellu, seda tuleb tähistada!

Vaara h6isata.kuubik lendab veel "prygimae" kohal

On aeg kosmoseprügi koristamise firma asutada! Muidu on varsti selline seis, et päike ei mahu vahelt läbi paistma.

[ES7TR]

On aeg kosmoseprügi koristamise firma asutada! Muidu on varsti selline seis, et päike ei mahu vahelt läbi paistma.

Vist juba asutatud...
http://www.postimees.ee/741102/sveits-h ... lmuimejaid
http://forte.delfi.ee/news/teadus/video ... d=63929657
http://www.minut.ee/article.pl?sid=11/0 ... ode=nested
Märkimist väärivad aga kaks tõsist sündmust, mille tagajärjel suurenes üldse kosmoseprügi tükkide arv nendest eelneva seisuga võrreldes kahekordseks - Hiina satelliiditõrjeraketi katsetuses 2007. aastal hävitatud satelliidi Fengyun-1C tükid ja 2009. aastal kokku põrganud Vene satelliidi Kosmos 2251 ja Ameerika satelliidi Iridium 33 tükid.
Lühidalt siin artiklis:
http://novaator.ee/ET/inimene/kosmos_upub_prugisse/

[x-f]

Hello, all!

I've been trying to receive the CW signal from ESTCube-1 for the past few days, but haven't heard anything on 434.25 MHz (+/- Doppler shift).
Is the beacon on at all? Is there a schedule when it is on? Is it on only when the satellite is not visible in Estonia? I'm in Latvia, so – close enough.
In the same time I can clearly see on the waterfall satellite's signal on 434.505, when it's above horizon, but haven't figured out, how to decode it yet.
I've tried listening on high and on very low passes, same result.

Excuse me for using English on Estonian forum, but I believe it's better than the outcome would be by using Google Translate. :)

[ES5TF]

Hello, all!
I've been trying to receive the CW signal from ESTCube-1 for the past few days, but haven't heard anything on 434.25 MHz (+/- Doppler shift).
Is the beacon on at all? Is there a schedule when it is on? Is it on only when the satellite is not visible in Estonia? I'm in Latvia, so – close enough.
In the same time I can clearly see on the waterfall satellite's signal on 434.505, when it's above horizon, but haven't figured out, how to decode it yet.
I've tried listening on high and on very low passes, same result.

The best chances to hear ESTCube-1 CW beacon from that close to Estonia is during afternoon when satellite has extremely low passes close to north direction. In coming days (this week), we plan to update also our groundstation software and I'll try to ask programmers to do it during one good pass close to noon. I'll let it know here if I'm successful or not By the way, the beacon period is usually 5 minutes now.

About receiving 9600 bps FSK data: Mike Rupprecht (DK3WN) has created nice telemetry decoder for EC-1. See his software page http://www.dk3wn.info/software.shtml and also for good 9k6 G3RUH-type soundmodem http://uz7ho.org.ua/packetradio.htm. To connect these two, you most probably should use AGW Online Kiss (this is communicating with UZ7HO soundmodem) from DK3WN. I should also warn that you certainly can not decode all the data because on-board software of the satellite has changed quite a lot since the end of July. But most of the subsystem housekeeping data (which is asked regularly in the beginning and end of the passes) should decode well. Also, keep your eye on the thread http://www.dk3wn.info/p/?cat=128

73, Tõnis

[x-f]

I think the CW beacon was on during a pass this morning, there was something like that with the right interval, but I was too focused on receiving the FSK telemetry and couldn't react quickly enough to record it.
And I didn't hear the beacon on this afternoon's pass.
Anyway, will try again until I succeed. :)
Thanks for the tips, Tõnis!

73, Kristaps

[ES6DO]

I think the CW beacon was on during a pass this morning, there was something like that with the right interval, but I was too focused on receiving the FSK telemetry and couldn't react quickly enough to record it.
And I didn't hear the beacon on this afternoon's pass.
Anyway, will try again until I succeed.
Thanks for the tips, Tõnis!

73, Kristaps

Hi Kristaps,

just monitoring EstCube pass, heard CW beacon very strong at 20.48-20.49 local on 437.249.090MHz.
Try again!

73 Neil ES6DO

[x-f]

Hi, guys!
Thanks for the heads-up, Neil! Tried it again at 22:26 and I got it this time!
Yay! :) Signal was strong indeed. Took a couple of hours until I managed to decode the CW properly, though. Screenshot – http://i.imgur.com/kX0Ko1g.png – fldigi somehow always misses the first char, I added the "E" manually there.

Automatic beacon decoder on ESTCube's website says "HTTP error: -111 Connection refused" to me, however DK3WN's "ESTCube-1 CW decoder" confirmed that the string was valid enough.
I'll email the data tomorrow morning to the ES5E, it's kind of late now already..

Thanks again!
Kristaps

[ES5TF]

Annan igaks juhuks teada, et kui kaua aega ei ole ESTCube majakat Eesti kohal kuulda olnud, siis homme päeval kohaliku kella järgi vahemikes 12:08 - 12:21 ja 13:45 - 13:57 plaanime satelliidil õige mitu korda majakat saata. Minimaalselt võiks seda 4 korda mõlemal suhteliselt kõrgel ülelennul kuulda olla.
Kristapsi teatatud viga peaks kah praegu parandatud olema - ootame majaka infot!

Juba küsiti, et kus taevakaares satelliit neil ülelendudel on? Vaadake näiteks Heavens Above'st:
http://www.heavens-above.com/PassSummar ... =75&tz=EET

Kui valida kõik ülelennud, siis peaks tekkima pikk nimekiri, klikatav esimese tulba väli viib kaardile, kus on ülelennu kaar ja kellaajad peal. Täpsemaks vaatamiseks võib ülaltoodud URLis oma koordinaadid õigeks panna...

[Hunt]

"Trükkplaate koos hoidvad teraspoldid ning akude korpused magneetusid ja mõjutasid vastasmõjus Maa magnetväljaga satelliidi asendit. Kui satelliiti pöörlema sundivad elektromagnetid välja lülitati, käitus satelliit kui kompassinõel ja võttis uuesti algse orientatsiooni."

https://et.wikipedia.org/wiki/ESTCube-1

Huvitav, et sedavõrd lihtsa asjaga mindi alt. Aga ma pole ka kosmoseekspert - võibolla tõesti vaskpoldid ei sobi üldse kosmosesse.