I always drink that "LIPOVITAN" to take up the slack near my homework deadline...
It's a part of the translation of Shin-ya Matsuura's blog http://smatsu.air-nifty.com/ with help from Google. All time in the sentence is JST.
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Press conference from "HAYABUSA link":4:00 p.m. on Nov.18th JST
This is the outline of Professor Kawaguchi's press conference held at 4:00 p.m. There are especially no data for media and started in Professor Kawaguchi's explanation suddenly.
Kawaguchi In the reharsal we obtained the teachings that we should not change SAGAMIHARA(in Japan) to NASA's DSN when the operation is critical point. So we postpone the landing by 12 hours (one rotation of Itokawa) it's DSN time.
7or8 conditions are established before landing, and Hayabusa goes up, without landing, if situation doesn't meet even one of them.
Hayabusa has already begun descent and start time changes by the degree of descent. A final approach speed is 3or4 cm/s. Since last 100m it will be approaching at this speed, landing time may be changed for about 1 hour.
The newest situation will ba announced around 3:00 a.m. on the 20th. A GO/NO GO judging is issued at 5:00 a.m. The posture of a hayabusa is made perpendicular to geographical feature of surface at the time of final touchdown. When it becomes like this, it becomes impossible for the communication from the earth using a high gain antenna. At this time, communication mode is changed to career mode (beacon). And we can know whether hayabusa is desending or ascending with Doppler shift. In this state, it touches down autonomously.
Hayabusa which has gone up turns a high gain antenna to the earth autonomously, and communication recovers . Carrying out first is to stop a rise. Subsequently, the data of a recorder is downloaded.
But this sequence will work when communication secured and it is not going to safe mode.
If hayabusa breaks down a posture greatly in the middle, a probe will go into the safe mode which try to turn a solar cell to the sun rotating gently. If it becomes like this, reorganization of a posture will take half a day. All the visible time of the Usuda office will be spent on posture reorganization. In this case, it will be said that download of a data recorder is visible from the Usuda office on following the 22nd.
Communication is secured to the time of target marker separation. Therefore, probably, target marker separation is understood considerably early. About three conditions are established after that, it becomes the posture perpendicular to geographical feature of Itokawa if conditions are fulfilled, and then communication goes out.
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