Huyghens, ci siamo!

[Shedar]

La missione piu' affascinante dell'intera storia del sistema solare sta per compiersi!

Speriamo bene ...

Finalmente! Dopo anni e centinaia di milioni di chilometri di viaggio la Huygens è arrivata!

[UgoDePayens]

A che ora si sa qualcosa?

[kkulissekk]

http://www.nasa.gov/multimedia/nasatv/index.html
Qui dovrebbe essere in diretta-- almeno mi pare
ciao ulisse

[discovery]

kkulissekk

http://www.nasa.gov/multimedia/nasatv/index.html
Qui dovrebbe essere in diretta-- almeno mi pare
ciao ulisse

Grazie mille er il link!!
Attendiamo impazienti..

[UgoDePayens]

EVVAI! Il segnale c'è... ragazi incrociamo le dita di mani e piedi.



Radio astronomers confirm Huygens entry in the atmosphere of Titan

14 January 2005
The Robert C. Byrd Green Bank Telescope (GBT) in West Virginia, USA, a part of the global network of radio telescopes involved in tracking the Huygens Titan probe, has detected the probe's 'carrier' (tone) signal.

The detection occurred between 11:20 and 11:25 CET, shortly after the probe began its parachute descent through Titan's atmosphere. The extremely feeble signal was first picked up by the Radio Science Receiver supplied by the NASA Jet Propulsion Laboratory. This signal is an important indication that the Huygens probe is 'alive'. However, it does not contain yet any substance; the latter is expected to come a few hours later via the Cassini spacecraft.

What the Green Bank radio telescope has detected is only a ‘carrier’ signal. It indicates that the back cover of Huygens must have been ejected, the main parachute must have been deployed and that the probe has begun to transmit, in other words, the probe is ‘alive’. This, however, still does not mean that any data have been acquired, nor that they have been received by Cassini. The carrier signal is sent continuously throughout the descent and as such does not contain any scientific data. It is similar to the tone signal heard in a telephone handset once the latter is picked up.

Only after having received the data packets at ESOC will it be possible to say with certainty whether data were properly acquired. The first data set from Cassini will reach ESOC in the afternoon. Additional downlinks will follow throughout the evening and night for redundancy.

Further analysis of the signals will be conducted using other three independent data acquisition systems at the Green Bank Telescope. In addition to the GBT, sixteen other radio telescopes in Australia, China, Japan and the USA are involved in tracking the Huygens probe.

The ultimate goal of the tracking experiment is to reconstruct the probe's descent trajectory with an unprecedented accuracy of the order of one kilometre. The measurements will be conducted using Very Long Baseline Interferometry (VLBI) and Doppler tracking techniques. This would enable studies of the dynamics of Titan's atmosphere, which is considered to be a 'frozen' copy of that of the early Earth.

The VLBI component of the tracking experiment is coordinated by the Joint Institute for VLBI in Europe (JIVE) and ESA; the Doppler measurements are conducted by the Jet Propulsion Laboratory.

[Uranus]

Oggi in classe non facevo altro che pensare alla Huyghens. ;D Shedar mi hai fregato il topic ;D
Good luck Huyghens!
Avviso che posterò notizie anche sul mio topic, il signore degli anelli II.

[Ali983]

Bene bene!!!Speriamo che vada tutto secondo i piani e che i dati raccolti dalla sonda chiarifichino la "vera natura" di Titano....
mi raccomando Uranus, fai un resoconto dettagliato!!

[Shedar]

http://www.uai.it/index.php?tipo=A&id=684

[Shedar]

Fiumi? Letti di fiumi? ...E cosa cavolo ci scorre dentro? :P