[FPSPACE] Chang'e-2 -- why the silence?
geertsassen at gmail.com
Sat Jan 19 00:54:17 EST 2013
for those who haven't seen it yet, there is a very interesting presentation
online with Chang-e-2 results at
On dinsdag 08 januari 2013 11:56:41 you wrote:
----- Original Message -----
From: Geert Sassen
To: James Oberg
Cc: fpspace at friends-partners.org
Sent: Tuesday, January 08, 2013 4:41 AM
Subject: Re: [FPSPACE] Chang'e-2 -- why the silence?
As far as I know several pictures have been taken, at least one more, close-
up, picture was shown on Chinese TV and probably there are more.
Other instrumentation was not activated, as has been stated in several media.
In fact, the pictures were taken with one of the engineering camera's (the one
which was originally used to picture the deployment sequence of the solar
panels). The real observation camera in the science package was not used as
this is a push-broom type of camera (like most similar camera's) which would
have required the whole spacecraft to slew in order to make correct images (as
Mars Express did during Phobos encounters). This is a more
complicated manoeuvre and would have resulted in only one or two pictures at
the very most, and even then only if they managed to pinpoint the target good
enough to get it into the camera view. Using the engineering camera was a
'quick and dirty' method of getting images, but it did require a very close
passage as this camera was obviously never intended for tele-shots of faraway
As I see it, the whole encounter was primarily a engineering-test for similar
missions in the future, not much science results were expected.
On Tuesday, January 8, 2013, James Oberg wrote:
So, a month after a sensationally-impressive asteroid fly-by, and not another
peep out of the Chinese news media? ONE photograph returned, no other
instrumentation active? Even then it's worth celebrating rather than
forgetting about completely.
What are we missing?
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