Space & Astronomy/Space and Astronomy (October 1993).iso/pc/text/spacedig/v11_0/v11_070.txt

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Date: Thu, 22 Feb 90 01:24:46 -0500 (EST)
Subject: SPACE Digest V11 #70

SPACE Digest                                      Volume 11 : Issue 70

Today's Topics:
            Re: Galileo Update - 02/12/90
               Re: Spacecraft on Venus
            Re: Galileo Update - 02/12/90
           Payload Status for 02/20/90 (Forwarded)
        Galileo information from Science News
              Re: Giotto is back
----------------------------------------------------------------------

Date: 19 Feb 90 21:24:54 GMT
From: island![e-mail]  (Robert Leyland)
Subject: Re: Galileo Update - 02/12/90

In article <[e-mail]> [e-mail] (Greg S. Hennessy) writes:
>In article <[e-mail]>
>[e-mail] (Shawn E. Koppenhoefer) writes:
>
>#Is there any way to get access to the RAW data or are we stuck
>
>Nasa  distributes CD-ROM disks with the RAW images, and the software
>to process the data. The CD-ROMS are sold basically at cost.
>
>-Greg Hennessy, University of Virginia

Ok, ok, now who/where do we contact to get these CD-ROMs.
I have a CD-ROM drive, and the Meridien Data GRIPS CD, which has some
(a selection) of neat images, but I would love to "play" with more. In my
work I do a lot of image processing software, and currently some image
generation stuff, and its nice to have real examples to compare against.

thanks,
robert...


--
Robert Leyland - Island Graphics, 4000 Civic Ctr Dr #400, San Rafael, CA 94903
{uunet|sun}!island!robert - [phone] - GEnie: r.leyland - std disclaimers

------------------------------

Date: 21 Feb 90 21:49:41 GMT
From: zaphod.mps.ohio-state.edu!uwm.edu!ogicse!unicorn![e-mail]  (Matthew Skinner)
Subject: Re: Spacecraft on Venus

In article <[e-mail]> [e-mail] (Henry Spencer) writes:
>In article <[e-mail]> [e-mail] (N = R*fgfpneflfifaL 20-Feb-1990 1302) writes:
>>        What would it take - in terms of alloys, etc. - for a manned
>>    spacecraft to survive on the planet Venus?  ...
>
>The chemical problems are manageable.  The real problem is not alloys,
>but building the most ferociously capable heat-pump system you ever saw,
>to pump heat out faster than it can leak in.  Not impossible, but a major
>engineering challenge.

A slight variation, but still dealing with getting rid of enormous heat loads,
in a fictional story, David Brin's _Sundiver_ uses a heat pump to drive a
laser since that is the energy level needed to exhaust heat close to the sun.
He called it a "Refrigerator Laser", but it seems you would need a good sized
nuclear power plant to drive the heat pump for any length of time.  Everything
(pressure vessel, ceramic anti-corrosive coating, nuclear reactor, laser) adds
up to landing something the size and mass of a nuclear submarine on Venus.

...anybody for pulling the Triton out of mothballs? :-)


--
Matthew Skinner                          skinner@ [ nessie | unicorn ].wwu.edu

------------------------------

Date: 21 Feb 90 18:30:12 GMT
From: zaphod.mps.ohio-state.edu!samsung!aplcen!haven!uvaarpa!hudson!astsun.astro.Virginia.EDU![e-mail]  (Greg S. Hennessy)
Subject: Re: Galileo Update - 02/12/90

In article <[e-mail]> [e-mail] (Robert Leyland) writes:
#Ok, ok, now who/where do we contact to get these CD-ROMs.
#I have a CD-ROM drive, and the Meridien Data GRIPS CD, which has some
#(a selection) of neat images, but I would love to "play" with more. In my
#work I do a lot of image processing software, and currently some image
#generation stuff, and its nice to have real examples to compare against.

I get my stuff from

Astronomy Data Center
NASA NSSDC
GSFC 633
Greenbelt MD 20771

I hope this helps.

-Greg Hennessy, University of Virginia
 USPS Mail:     Astronomy Department, Charlottesville, VA 22903-2475 USA
 Internet:      [e-mail]
 UUCP:        ...!uunet!virginia!gsh7w

------------------------------

Date: 21 Feb 90 16:32:39 GMT
From: trident.arc.nasa.gov![e-mail]  (Peter E. Yee)
Subject: Payload Status for 02/20/90 (Forwarded)

Daily Status/KSC Payload Management and Operations 02-20-90

- STS-31R HST (at VPF) -

VPF closeout activities were worked yesterday including bays
7 and 10 closeout.  Closeouts will continue today with MLI
and velcro installations.


- STS-32R SYNCOM/LDEF (at SAEF-2)

LDEF deintegration continues.


- STS-35 ASTRO-1/BBXRT (at O&C) -

CITE closeout activities were worked yesterday and will
continue today along with BBXRT T-O checks.

- STS-40 SLS-1 (at O&C) -

The systems test was started yesterday and will continue
today.  Experiment functional checks will also continue
today.

- STS-42 IML (at O&C) -

Racks 3, 9, and 11 staging activities will continue today.


- STS-45 Atlas-1 (at O&C) -

Pallet 2 connector bracket installation along with pallet 2
and 3 hard point installations will be worked today.


- STS-46 TSS-1 (at O&C) -

PPCU checkout will continue today.

------------------------------

Date: Wed, 21 Feb 90 18:31:02 -0500 (EST)
From: "Todd L. Masco" <[e-mail]>
To: Outbound News <[e-mail]>,
    Space <[e-mail]>
Subject: Galileo information from Science News

(Reprinted from Science News, Feb. 17, 1990, p.103, w/ out permission)

        Venus: Galileo's first planetary flyby
        -------------------------------------

    As the spacecraft Galileo swung  past Venus last week, getting
a gravitational boost in  speed  on its way  to a 1995 rendezvous with
Jupiter, NASA officials expected the craft's  camera shutter  to click
16 times.  The number had  reached 56  when   data showed the  shutter
still clicking, and it had progressed to 468 by the time commands sent
by ground controllers and by Galileo's own computer stopped it.
    Engineers  controlling the mission  from NASA's Jet Propulsion
Laboratory  in Pasadena, Calif., were  relieved   to discover that the
problem resulted from a  correctable  software mistake  rather than  a
malfunction  in  the camera  itself    or   an incoming  solar  proton
disrupting Galileo's computer  memory.  About  65 more photos remained
on  the  week's   shooting schedule   at Venus,  since the  shutter is
designed to operate 150,000 times.
    Most  of Galileo's scientific  data will not reach Earth until
the craft's tape  recorder can play them back   in  October (when  the
proper antenna onboard deploys).  But some  results have reached Earth
already, including three  of the  photos and  a batch of near-infrared
mapping data.
    Galileo's  two  ultraviolet  spectrometers   have  shown,   as
expected, that hydrogen atoms at  Earth's distance  from the sun  last
about 1 million second (almost 12  days) before ionizing, says Charles
W. Hord of  the University  of Colorado in  Boulder,  and that a cubic
centimeter  of   space  contains an average   of  about 1 interstellar
hydrogen atom.
    Because Galileo follows a   flight  path that will   let   its
ultraviolet instruments observe from both  inside and outside  Earth's
orbit,  scientists  will  have  a  unique   chance  to investigate the
controversial theory that numerous small comets are being vaporized by
running  into   Earth's atmosphere.  If   the theory is  correct, more
hydrogen should  appear  in data   from   Galileo's  present  "inside"
position - looking  through the presumed vaporized comets  - then will
show up after the craft has crossed Earth's orbit.
    Galileo  is already reporting  on  the ultraviolet spectra  of
stars (the one  measured so far is  Kappa Velorum, says  Hord) and  on
impacts by space dust.  The  largest piece  yet detected weighed about
one hundred-millionth of a gram and measured about 26 microns across.

        -- Article written by J. Eberhart

--
| Todd L. Masco        |  Quantum Mechanics: The dreams stuff is made of.
| [e-mail]  |        ( ...!harvard!andrew.cmu.edu!tm2b )

------------------------------

Date: 21 Feb 90 13:29:36 GMT
From: cs.utexas.edu!samsung!umich!sharkey!amara![e-mail]  (S. Khai Mong)
Subject: Re: Giotto is back

In article <[e-mail]> [e-mail] writes:
>   The Giotto spacecraft had been put into "hibernation" shortly after
>   the Halley encounter. This means the spacecraft is in a attitude with its
>   spin axis perpendicular to the obital plane.

Why is that the most logical attitude when it is put into hibernation?
--
Sao Khai Mong:   Applied Dynamics, 3800 Stone School Road, Ann Arbor, Mi48108
[phone] (uunet|sharkey)!amara!khai  [e-mail]

------------------------------

End of SPACE Digest V11 #70
*******************