V-ati gandit vreodata ca programele (mda, si chiar si viata) cu care ne-am obisnuit se pot schimba fulgerator?
Satelitii de televiziune, au si ei o viata, se nasc intr-o hala, cresc, lansati/"carati" fiind de o racheta pe orbita, traiesc (dand cu capul de tot felul de micrometeoriti care ii bombardeaza) si ii tot muta incolo si incoace cate putin, revin la pozitie cu eforturi mari, dar intr-un final mor.
Cind isi epuizeaza resursele (se epuizeaza combustibilul rachetelor de pozitionare care ii tin pe loc, la x grade pe orbita geostationara) cu un ultim efort si ultimele grame de combustibil, sint scosi din pozitiile stationare unde si-au dus viata si sint trecuti pe line moarta, adica pensionati pe alte orbite, devenind obiecte inerte care zboara si ele bezmetic in jurul Pamantului.
La 16 grade est e un mare "hub" de programe romanesti. Pachetul TVR sau Antenele 1,2,3,4 de pilda.
Eutelsat W2, atingand el varsta de pensionare, urma sa fie inlocuit anul asta cu mai nou noutul W2N. Acesta, lansat in 2008 a "capatat buba"
http://www.broadbandtvnews.com/2009/01/28/in-orbit-failure-for-eutelsat-w2-replacement/
undeva prin spatiu (ceva la panourile solare sau prin placile electronice probabil) asa ca atunci cand a ajuns acasa la pozitia de 16 grade (stiti ca ei se misca zile intregi cu rachetutele de
pozitionare pana ajung unde trebuie, fiindca, de regula, imediat dupa lansare stau o vreme pe o alta pozitie "in probe") W2N asta ranit nu a mai fost pus in functiune comerciala, fiind pus la teste doar doar vor descoperi ce a patit.
Eutelsat a pregatit pentru mijlocul lui 2010 lansarea unui satelit W3B care sa il inlocuiasca pe W2N, defectul.
Iata insa ca joi seara, batranul W2 hotaraste ca, gata, pana aici mi-a fost si brusc 400 de canale TV raman in bezna. Poc, ecran negru. Si radiourile comerciale nordice au amutit.
OOPS, probleme Gogule? Mari!
http://www.broadbandtvnews.com/2010/01/28/anomaly-takes-out-eutelsat-w2/
Eutelsat se pune imediat pe treaba si
http://www.broadbandtvnews.com/2010/01/29/eutelsat-working-on-w2-problems/
vineri, doi sateliti Eutelsat W2M and Sesat V1 sunt mutati de la pozitiile lor din cosmos, tropa tropa usurel, ca sa vina in ajutorul lui W2. Luni dimineata, pozitia orbitala la 16 grade est era din nou "full" functionala.
Am incalecat pe-o sa si ... asta a fost povestea satelitilor.
http://www.broadbandtvnews.com/2010/01/29/eutelsat-confirms-restoration-of-services/
By *Robert Briel*
January 29, 2010
Mon 10.30 Update: Working in close collaboration with clients, Eutelsat
Communications has confirmed that all services affected by the technical
anomaly which occurred in the evening of Wednesday, January 27 on the W2
satellite are now fully restored at 16 degrees East.
Services are running normally using capacity on three satellites
collocated at 16 degrees East: Eurobird 16 which has been operating at
this position since April 2009, W2M which was deployed at the beginning
of January to 16 degrees East in order to enter commercial service, and
Sesat 1 which arrived on January 28 following the completion of its
commercial mission at 36 degrees East after the entry into service of W7.
However, one operator expressed concern that while the replacement
satellites had restored services within a relatively short space of
time, reception had been made more difficult towards the edge of the
satellite footprint, or for those subscribers with poorly aligned dishes.
In parallel to the manoeuvres, W2 has been placed in secure standby mode
in order for Eutelsat and the satellite's manufacturer, Thales Alenia
Space, to carry out a full investigation into the technical anomaly.
Niciun comentariu:
Trimiteți un comentariu
Comentariile sint moderate!