Space Forum / Astronomy / December 2008

- the help desk is in Mumbai .

None of your ideas is plausable.
http://www.isro.org/pslv-c11/photos/moon_images.htm

Troll.

ISRO seems semi fixed.  Let us hope it stays fixed.

http://www.isro.org/pslv-c11/photos/moon_images.htm

~ BG

You forgot the GIANT CONSPIRACY!  lmfjao!

Saul Levy

Here’s the most “plausible reason for no chandrayaan pictures”, or at
least why the recent delay and otherwise limited science.  At this
sluggish rate they’ll have to extend their mission by another year, if
not two extra years should their mission keep overheating.

It’s not just the crystal dry 1e18 kg worth of surface dust and lose/
uncompacted rock, or soil if you like, that’s keeping most of our
mineral composite Selene/moon bedrock surface hidden from view, as
apparently the daytime orbital thermal over-load from the unexpected
secondary IR was considerably greater than anyone at ISRO had
expected.

Apparently ISRO has been on that pesky need-to-know basis, and as such
was clearly not informed by way of anything from our NASA or Apollo
missions, as pertaining to the secondary/recoil plus whatever
reflected amount of daytime IR that’s in addition to whatever the sun
directly contributes towards heating their Chandrayaan-1 satellite
that had been designed for operating well below 40°C, though instead
quickly exceeded 50°C.

http://www.dancewithshadows.com/tech/chandrayaan-1-temperature-rises/
 The temperature inside Chandrayaan-1 has increased after a sudden
increase in lunar temperature during its lunar orbit.

M Annadurai, project director of Indian’s moon mission, has been
quoted as saying, “Now the moon, our satellite and the sun are in same
line this means our craft is receiving 1,200 watts of heat from the
moon and 1,300 watts from the sun per meter square.”

ISRO has said that November - December is the time during which the
summer cycle of the Moon takes place. With the moon and the sun
aligned with each other, the outside temperature can go up to 123° C.
The temperature of the side of the Moon that does not face the Sun
plummets to -223° C.

The temperature inside Chandrayaan-1 has gone up to 50° C. The ISRO
has switched off or reduced the use of several instruments, like
mission computers,  in Chandrayaan-1.

Mr. Annadurai said that the temperature within Chandryaan-1 had to be
kept below 50° C, to safeguard the payloads in the craft from
irreversible damage.

Mr. Annadurai has said that they have also rotated Chandrayaan-1 by 20
degrees, which along with the shutting down of certain instruments,
has led to a dip in the temperature to 40 degree C.

As of now, all the instruments in the Chandrayaan-1 are in order and
functioning well.  As part of the measures taken to deal with the
heat, ISRO will raise the orbit of Chandrayaan-1, which is in orbit
100km away from the moon, in case all other methods fail.

ISRO expects the temperature of the Moon to come back to normal by
December 2008.

ISRO plans to switch on Chandrayaan-1’s high-voltage payloads SARA and
Hex after that.

As of now, out of Chandrayaan-1’s eleven payloads, the payloads that
have been switched on are, the Terrain Mapping Camera (TMC), the Hyper
spectral Imager (HySI), Radiation Dose Monitor (RADOM), Moon Impact
Probe (MIP), and the Lunar Laser Ranging Instrument (LLRI).
(end quote)

Notice the added “1,200 watts”/m2 of unexpected secondary IR albedo,
whereas I’d thought the IR albedo average was toasty enough as based
upon being closer to 33% (450 w/m2), though most certainly had not
considered that our physically dark Selene/moon was capable of
radiating at such great of IR albedo (<90%), although it makes sense
as to why orbiting that moon or much less being upon its physically
dark and dusty surface by day would have to be so extremely double
extra hot.

No wonder that local element of sodium has been getting continually
vaporized.

~ Brad Guth Brad_Guth Brad.Guth BradGuth BG / “Guth Usenet”