ARISS Schoolcontact met Olomouc, Moravia in Tsjechie op dinsdag 8 maart om 8:22 UTC

Voor dinsdag 8 maart is een ARISS schoolstation verbinding met ISS gepland om 9:22 lokale tijd. Deze verbinding is de eerste verbinding met de Tsjechische republiek ooit. De verbinding duurt naar verwachting 9 minuten en is in een groot deel van Europa te beluisteren op 145,800 MHz. Denk wel aan de dopplercorrectie.

Het is een rechtstreeks contact tussen de school met de call OK2KYJ en Tim Peake die de algemene ISS call OR4ISS gebruikt. OK2KYJ is de gemeenschappelijke call van de radioclub van studenten van drie middelbare scholen in Olomouc. (www.ok2kyj.cz) Er zijn diverse websites die de voorbereidingen en fotoseries voor dit contact weergeven.

Als onderdeel van dit contact zijn diverse nationale wetenschappers en astronomen uitgenodigd om vooraf presentaties te geven om studenten enthousiast te maken voor zowel ruimtevaart techniek als communicatie techniek.

Er is ook een live video stream gepland die mogelijk al enige tijd voor het contact met ISS begint.

Naast dit alles is er tegenwoordig ook een redelijke kans dat de DATV zender ook weer ingeschakeld wordt door Tim Peake.

Die beelden zijn dan te volgen op  http://www.batc.tv/iss/

Voor meer info zijn er links naar de drie scholen.

http://exfyz.upol.cz/didaktika/iss/
http://exfyz.upol.cz/didaktika/iss/foto/upcrowd/index.html
http://exfyz.upol.cz/didaktika/iss/foto/skoly/index.html

De vragen die gesteld worden zijn:

1. Alzbeta (18): What is it like eating in zero gravity?
2. Frantisek(19): How can you relax on the ISS? Do you have time to watch movies?
3. Vojtech (19): Is the day/night cycle the same as on Earth? Are you on shifts?
4. Barbora (18): What was the most difficult or strangest thing to get used to on the ISS?
5. Monika (18): Does your stay in space have any influence on your health and if so, how?
6. Robin (17): What do you miss most from gravity on Earth?
7. Anna-Marie (18): How do you deal with the isolation from your family?
8. Linda (19): Is it possible to catch a cold on the ISS or is it a completely sterile environment?
9. Tomas (18): Can you use a 3D printer in the same way as on Earth?
10. Alzbeta (18): How do you overcome weightlessness when back on Earth?
11. Frantisek (19): Does time pass slower or faster in your daily routine aboard the ISS compared to life on Earth?
12. Vojtech (19): Do you access the Internet in the same fashion as on Earth?
13. Barbora (18): Do you have any musical instruments on the ISS?
14. Monika (18): Are you planning a stay of a small pet aboard the ISS?
15. Robin (17): Are there any special items that you carry with you all the time?
16. Anna-Marie (18): What do you think is the biggest problem for humans to go beyond low earth orbit?
17. Linda (19): How are you being filmed during a spacewalk?
18. Tomas (18): Is it possible to compare life on ISS to somewhere on Earth?

 

Bertus

PE1KEH

1000 ste ARISS contact

Deze maand wordt het 1000ste ARISS schoolcontact met ISS gemaakt.

ARISS, NASA en ARRL vieren dat middels een Youtube-filmpje dat 1.5 minuut duurt.

De ARISS organisatie bestaat uit een internationale werkgroep afkomstig uit Europa, Japan, Rusland Canada en de Verenigde Staten en is in 2001 opgericht tijdens een internationale ontmoeting bij ESA/Estec in Noordwijk.

De leden van de werkgroep zijn allen vrijwilligers afkomstig uit nationale radiozendamateur organisaties en AMSAT organisaties uit vele landen.

ARISS International is in 2001 opgericht. Sinds die tijd coordineert ARISS de contacten met de verschillende ruimtevaart organisaties zoals ESA (Europa), JAXA (Japan) Energia (Rusland) en NASA (USA). Hierdoor is het mogelijk gebleken een gewaardeerde en betrouwbare gesprekspartner te zijn. Dit heeft geresulteerd in het installeren van een aantal antennes op de buitenkant van ISS en het plaatsen van zend-ontvangers in het ruimtestation. Als laatste is daar ook een digitale ATV-zender aan toegevoegd waardoor het nu mogelijk is om tijdens een schoolcontact de astronaut rechtstreeks in ISS bezig te zien.

Te ontvangen verbinding tussen ISS en een school in Engeland

Op vrijdag 8 januari 2016 om ongeveer 08:47 UTC, is een ARISS contact gepland tussen ISS en de Sandringham School in St. Albans, Hertfordshire, Engeland. GB1SAN zal de operator op aarde zijn, Timothy Peake KG5BVI zal GB1SS in ISS activeren.

Voor de volledigheid en duidelijkheid (in lokale tijd):

ISS zal vanuit midden Nederland opkomen rond 9:48 op 277 graden, rond 9:53 z’n hoogste punt bereiken (66 graden elevatie) en rond 9:57 ondergaan op 109 graden. Hij vliegt dus van west naar oost in een paar minuten over ons heen.

De verbinding zal plaatsvinden op 145,800 MHz.

Om een indruk te krijgen hoe het er vanuit ISS uitziet kan hier de interactieve simulatie bekijken (gebruik daarbij de linkermuisknop om aan ander gezichtspunt te kiezen en het scrolwieltje om in- en uit te zoomen).

SSTV uitzendingen vanuit ISS midden januari 2015

De SSTV uitzendingen vanuit ISS die oorspronkelijk op 26 en 27 december zouden worden uitgezonden zijn uitgesteld tot midden januari als gevolg van de drukke werkzaamheden in ISS. Aanleiding is het feit dat ARISS nu 15 jaar bestaat. De downlink frequentie is zoals gebruikelijk 145,800 MHz. nu met PD120 codering. Hierdoor worden de beelden iets sneller verstuurd waardoor per passage van ISS meer beelden uitgezonden kunnen worden.

Bertus

PE1KEH

FOX-1A is op 8 oktober met succes gelanceerd!

De eerste waarnemingen komen van PE0SAT, ON4HF en R2ANF. FOX-1A heeft de aanduiding Amsat-Oscar 85 (AO-85) gekregen.

Overzicht frequenties van nieuwe Chinese amateur satellieten is beschikbaar

Een pdf file met de frequenties van de nieuwe Chinese Camsat XW-2CAS-3 satellieten is beschikbaar.
De lancering is uitgesteld tot 19 september om 23:00 UTC. Kijk op de website van Amsat.org voor meer details.

IARU coördinatie van satelliet frequenties

IARU committed to only coordinate satellite frequencies within the internationally aligned IARU band plans.

The two metre amateur band is one of the most popular and populated bands in all the spectrum allocated to the amateur and amateur satellite services. This recently led to a request by satellite builders for coordination outside the spectrum reserved for satellites in the IARU band plans (145,800 – 146,000 MHz) as not enough channels are available to satisfy their requirements.

The IARU Satellite Adviser, Hans van de Groenendaal, ZS6AKV and his advisory panel are mandated to coordinate frequencies within the IARU band plans for amateur satellites. Coordinated frequencies must comply with band plans that are common to all three IARU Regions Satellites coordinated outside these plans could cause interference to terrestrial amateur operations in other regions. In theory satellites could be programmed so that they only operate over their country of origin.  Because satellite orbits make it difficult to pinpoint operations, spill over to other Regions may occur during parts of the orbit. Accordingly, IARU will not coordinate frequencies for satellites which are planned to operate outside the internationally aligned IARU band plans for amateur satellites.

The IARU offers frequency coordination in an effort to maximise spectrum utilisation and avoid possible interference to other satellites and ground stations.

The IARU requests that satellite groups work on a sharing plan or use other parts of the amateur service spectrum designated for satellite operation. When a large group of satellite sharing the same band are launched, they will soon drift apart which enhances the opportunity to share the same frequencies. For example, during the initial phase, just after launch, a time sharing system could be used to monitor the payloads before initialising transponders and other systems.

For instance, the 10 metre band, once popular with satellite builders, is today not significantly used. The band segment 29,300-29,510 MHz has been used for amateur-satellite downlinks for more than 40 years, beginning with Australis-OSCAR 5 in 1970 and AMSAT-OSCAR 6, AMSAT’s first communications satellite, in 1972.  The band segment was very popular for downlinks in the 1970s and 1980s.  Today, only one amateur satellite actively uses a 29 MHz downlink: AMSAT-OSCAR 7, launched in 1974. While a 29 MHz downlink would not be practical for today’s very small satellites, owing to the size of the antenna required, the band could be used very practically for uplinks even with small receiving antennas, because transmitting power at the earth station is easy to obtain.  The IARU Satellite Adviser and his panel believe that the 10 metre band offers a good alternative to2metre uplinks

Currently the IARU team also coordinates frequencies for satellites built by universities and educational groups in an effort to maximise spectrum utilisation and mitigate any possible interference to Amateur Radio operations. The IARU is committed to work with these groups and with the ITU to find other spectrum for these satellites.
________________________________

Rod Stafford W6ROD
Secretary
International Amateur Radio Union (IARU)

ARRL letter van 13 augustus met bericht over de frequentie coordinatie

AMSAT Echoes IARU Satellite Coordination Concerns

AMSAT-NA has joined the International Amateur Radio Union (IARU) in expressing concern that some soon-to-be-launched satellites operating in Amateur Radio bands could cause conflicts in some ITU regions. In an August 7 statement on behalf of the IARU, Secretary Rod Stafford, W6ROD, said the IARU had become aware of plans to launch a series of satellites, “where the frequencies proposed appear to conflict with existing IARU band plans” in parts of the world.iaru-logo

“IARU is investigating how this has arisen, and is discussing the issues with the parties involved,” Stafford said. AMSAT-UK has reported that the IARU Satellite Coordinator was asked to look into the matter.

While Stafford did not name any specific satellites that may be of concern, AMSAT-UK has said that some frequencies proposed for the Chinese Amateur Radio Group (CAMSAT) XW-2/CAS-3 mission do not respect the internationally agreed-upon 2 meter band plan for IARU Region 1.

AMSAT-NA President Barry Baines, WD4ASW, told the ARRL that AMSAT’s initial excitement regarding the pending CAMSAT launch of nine Amateur Radio satellites has been tempered by concerns that some of the proposed amateur frequencies may not have been properly coordinated.

“While these frequencies are within the spectrum allocated for the Amateur Satellite Service, several will conflict with existing terrestrial allocations, as well as with the normal voice and SSTV downlink from the ISS,” Baines told ARRL. “We support the IARU’s effort to determine how the lack of coordination occurred, to mitigate the interference issues to the maximum amount possible, and to ensure that future amateur satellites will be coordinated in accord with established norms for the benefit of all.”

amsat logoIn a related matter, also alluded to by Stafford, the operation of an existing satellite — the 14-year-old PCSAT (NO-44) — recently became a problem over Europe, when it began transmitting APRS on 144.390 MHz, due to technical issues related to its age. APRS on that frequency is not compatible with the Region 1 band plan. “This unfortunate circumstance appears to be unintentional,” Baines allowed in his comments to ARRL. “There are lessons to be learned in satellite design from this experience that will hopefully be followed in the future to mitigate such potential problems,” Baines added. Users have been asked not to digipeat via PCSAT while the satellite is over Europe.

With the support of the International Telecommunication Union (ITU), IARU volunteer satellite coordinators assign appropriate frequencies for satellites designed to operate on Amateur Radio frequencies. Stafford said these efforts have generally been successful, “allowing satellites to operate without undue interference to each other and to other services using the bands in question.” — Thanks to IARU, AMSAT, and AMSAT News Service

Satelliet frequentie coordinatie

For some years, IARU has sought, through its group of volunteer satellite coordinators, to assign appropriate frequencies to be used by space satellites operating in the amateur bands. These efforts have generally been successful, allowing satellites to operate without undue interference to each other and to other services using the bands in question. The IARU role in coordination of frequencies is supported by ITU.

IARU is aware of a few satellites already operating in amateur bands which are causing difficulties in parts of the world as the frequencies they use do not appear to accord to existing band plans.  IARU has now become aware of plans to launch a series of satellites where the frequencies proposed appear to conflict with existing IARU band plans in some parts of the world. IARU is investigating how this has arisen, and is discussing the issues with the parties involved.

We will make a further statement as soon as possible.
Rod W6ROD

Linken t.a.v. ongewenste satellietsignalen in de 2 meterband

Het wordt nog erger.

Murray Niman (RSGB) liet het volgende weten:

I do expect some IARU action but not sure if it will change much

We have been in contact with Bob Bruninga to see what may be possible for NO-44/Pacsat but it is made harder by its high orbit, summer sunlight and power budget It is important that east coast USA  stations as well as Europeans amateurs do not digipeat to it and make it worse

After this we did a check on other possible candidates.

Unfortunately by coincidence we are also faced with some additional new USA and Chinese satellites that have both 144.390 and 145.xxx outputs  which could cause even more problems so its already been elevated to the IARU Region-1 level  – Don Beattie is on it already along with Graham Shirville etc

Regards
Murray

China: (Ignored the coordination process)

http://www.arrl.org/news/chinese-amateur-radio-satellites-set-to-launch-in-early-september

– but look at the frequencies pdf file!!!

Two extra USA ones

http://aprs.org/qikcom-1.html and

http://aprs.org/qikcom-2.html

So for example see

http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=427

– which hopefully wont be as bad as the NO-44 example, but is not helpful