Beagle все молчит :(

Anna · 28 дек 2003

Beagle2: news

As part of the Media update on 27th December, Professor Alan Wells (Lander Operations Control Centre, University of Leicester) outlined details of the work being undertaken by the Beagle 2 team to assess the current situation. A specialist team, titled the "Analysis and Recovery Think Tank", has been established to concentrate on understanding the reasons for Beagle 2's apparent failure to make contact with Earth, and to address the steps that may be taken to resolve these problems.
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After touchdown the planned communication sessions should have automatically been triggered, by the onboard 'clock', to correspond with the known passing of the orbiting spacecraft Mars Odyssey (NASA), and later on in the mission, Mars Express (the ESA 'mother ship'). A number of the pre-programmed sessions were also scheduled to correspond with times when the landing site is in 'sight' of the Jodrell Bank Radio Telescope. Any signal picked up by Jodrell, or an alternative telescope, will only serve to confirm the well-being of Beagle 2 - it does not offer an opportunity for two-way communication; this can only be achieved via Mars Odyssey or Mars Express.

If the lander software is running as planned, and according to the initial timing dictated by the onboard clock, a number of the programmed communication sessions have already passed.
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А вот абзац, который меня просто потряс:

One possible explanation that has been raised for the apparent silence is the potential for incompatibility between the systems on board Beagle and those used by Mars Odyssey. The Beagle team has been in constant contact with the Jet Propulsion Lab, in Pasadena, and fellow scientists there are presently checking through data and records in order to ascertain whether there may be any problems with the transmitters and receivers aboard Odyssey. It is important to note that neither of the communication routes attempted so far has ever been tested, therefore it is possible that the best opportunity for successful communication may arise when Mars Express achieves its final orbit and can take part in the search for Beagle.
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Дальше описание того, что будет, если ни одна из 10 запланированных сессий не состоится.

A backup has been built into the communication schedule such that if 10 scheduled sessions pass unsuccessfully then Beagle 2 will switch to an emergency mode 'search mode 1'. Planned Jodrell contact sessions are included in the count because Beagle can have no way of knowing whether these 'one-way' sessions have been successful. When the lander switches to search mode 1 it will proceed to attempt a communication with the best daytime and best nighttime orbiter pass each day - these times are calculated according to an onboard model of the orbits of both Mars Odyssey and Mars Express.

Session 10 is scheduled for the evening of 30th December, and if a regular contact has not been made by this time 'search mode 1' will be activated, increasing the opportunity for communication with a 'passing' orbiter or for detection of Beagle 2 by Radio telescope from earth.

If a further 10 communication sessions are unsuccessful, Beagle will then switch to 'search mode 2'. The second emergency mode involves the production of a signal throughout the martian day (power is still conserved during the night). With two 'search mode 1' sessions taking place each day, the adoption of search mode 2 would, in theory, begin on January 5th - soon after the date when Mars Express is first available for communication.
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И еще одно объяснение:

A further explanation for the lack of contact between Beagle and the earth is that the onboard clock may have been corrupted during the entry, descent, and landing stage of the mission.
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DIMAS · 29 дек 2003

Марс враждебно воспринимает все попытки землян изучить эту планету. Это далеко не первая провальная экспедиция.

Anna · 29 дек 2003

Байки о печальной судьбе станций Фобос мы как раз на одном из первых курсов физфака слышали

Действительно, странно. Хотя, с другой стороны, все-таки объяснимо без привлечения армии зеленых человечков в качестве оправдания профуканных на экспедицию денег :maddy:

Хоть бы они проверили, что ли, может ли бигль с одиссеем разговаривать... просто странно читать рассуждения о том, что у них, видите ли, могли протоколы не совпадать :unsure:

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Beagle все молчит :(

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Beagle все молчит :(

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