Space & Astronomy/Space and Astronomy (October 1993).iso/mac/TEXT/SPACEDIG/V11_2/V11_227.TXT

Internet Message Format | 1991-07-08 | 15KB

Return-path: <[e-mail]>
X-Andrew-Authenticated-as: 7997;andrew.cmu.edu;Ted Anderson
Received: from beak.andrew.cmu.edu via trymail for +dist+/afs/andrew.cmu.edu/usr11/tm2b/space/[e-mail] (->+dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl) (->ota+space.digests)
          ID </afs/andrew.cmu.edu/usr1/ota/Mailbox/4a73AUq00VcJ0:wk59>;
          Fri,  6 Apr 90 02:11:45 -0400 (EDT)
Message-ID: <[e-mail]>
Reply-To: [e-mail]
From: [e-mail]
To: [e-mail]
Date: Fri,  6 Apr 90 02:11:19 -0400 (EDT)
Subject: SPACE Digest V11 #227

SPACE Digest                                     Volume 11 : Issue 227

Today's Topics:
                 UNSUBSCRIBE
        Re: HST Image Status for 04/01/90 (Forwarded)
            Re: Galileo Update - 04/04/90
      Re: Discovery's Spin in 2010 (Was Re: Artificial gravity)
     Re: Quick launches ( was: Intelsat / Titan Failure )
            Space News for April 2-8 1990
                STS26 program
             Need info on Space Stations
              orbit definitions
      Re: Seeing the Jupiter picture (Was Re: HST Image Status)
              Re: National Space Society
----------------------------------------------------------------------

Date: Thu, 5 Apr 90 08:51:07 EDT
From: [e-mail] (Ken Ellis)
Subject: UNSUBSCRIBE

Please remove me from your subscription list. Thank You.

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

Date: 5 Apr 90 23:53:49 GMT
From: [e-mail]  (Patty Winter)
Subject: Re: HST Image Status for 04/01/90 (Forwarded)

In article <[e-mail]> [e-mail] (Jack Hudler) writes:
>Subject: Re: HST Image Status for 04/01/90
>One look at the title should tell you what it's going to be!! jeez!

In article <[e-mail]> [e-mail] (Paul
 Dietz) writes:
>Before you decode the picture, note: (1) the date on which it was sent,
>and (2) the name of the sender.

Aw, c'mon guys--have a sense of humor. Of *course* it's a fake, but it's
a neat picture. I didn't consider it a waste of time at all to transfer
it to my Mac and print it.

Just after I posted the printing instructions, I sent a note to Stuart
asking where the picture had really come from (since HST was obviously
never a possibility, even if he hadn't given the game away by spoofing
the posting as being from Edwin Hubble). I was surprised to find out
that it wasn't Jupiter after all. Turns out it's the product of a
nifty program that Stuart wrote to generate images of imaginary
gas-giant planets. I'm impressed!

April Fool's Day is for playing along with, not for being so "cool"
that you miss out on the fun!


Patty
--
*****************************************************************************
Patty Winter N6BIS                        INTERNET: [e-mail]
AMPR.ORG: [44.4.0.44]                     UUCP: {decwrl,nsc,sun}!apple!winter
*****************************************************************************

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

Date: 5 Apr 90 16:43:47 GMT
From: usc!elroy.jpl.nasa.gov!jato!mars![e-mail]  (Ron Baalke)
Subject: Re: Galileo Update - 04/04/90

In article <[e-mail]> [e-mail] (John Kallen) writes:
>In article <[e-mail]> [e-mail] (Ron Baalke) writes:
>>                   GALILEO MISSION STATUS
>>                        April 4, 1990
>...
>>....  On April 17, ultraviolet spectrometer measurements
>>will be made on the star Lyman Alpha.
>
>Eh? Isn't Lyman Alpha a wavelength? Never heard of the constellation
>"Lyman" :-)

You are right. It should have read that ultraviolet spectrometer measurements
will be made on the scattered sunlight on the Lyman-alpha spectral line to
study the distribution of interplanetary gas outside of Neptune's orbit.
Sorry for the confusion.

 Ron Baalke                       |    [e-mail]
 Jet Propulsion Lab  M/S 301-355  |    [e-mail]
 4800 Oak Grove Dr.               |
 Pasadena, CA 91109               |

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

Date: 4 Apr 90 00:28:33 GMT
From: megatest![e-mail]  (Bruce Bowen)
Subject: Re: Discovery's Spin in 2010 (Was Re: Artificial gravity)

[e-mail] (Nick Watkins) writes:

>Worse is the fact that "Discovery" is found tumbling end over end,
>purportedly due to the gyros seizing. The carousel could not have been
>spinning in that plane however, so the angular momentum has somehow been
>transfered through 90 degrees with no external torque. This strikes me
>as a nice trick if you can do it, but I don't think you can, am I wrong?

   Why are you assuming the angular momentum has changed?  For the
sake of argument, assume Discovery was initially vertical, the
carousel would then be rotating in the horizontal plane.  The angular
momentum vector would also be vertical.  When the carousel seized and
after everything had reached equilibrium, the long axis of Discovery
would reside in and rotate in the horizontal plane.  It would still be
rotating about the same vertical axis.

   What happens is that the long axis of Discovery starts to diverge
from the vertical rotation axis.  The long axis of Discover starts to
trace out an ever widening cone about the vertical axis (it appears to
be wobbling or precessing).  This process continues until the
divergence angle between Discovery's long axis and the vertical
rotational axis reaches 90 degrees.  You can see that if there is any
angle ( 0 < a < 90) between Discovery's long axis and the vertical
axis of rotation the system will be imbalanced.  There will be
internal torques (but no external of course) and stresses.

  Try mounting a wooden dowel onto another at some angle other than
90 degrees and rotate this construct along the axis of one of the
dowels.  Unless the second dowel is at 90 degrees you (holding the
rotational axis dowel in your hand) will feel the imbalance in your
fingers.


Bruce

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

Date: 5 Apr 90 02:51:52 GMT
From: cincsac.arc.nasa.gov![e-mail]  (Milo S. Medin)
Subject: Re: Quick launches ( was: Intelsat / Titan Failure )

If you are interested in quick reaction launch capabilities, you are
probably better off trying to use an ICBM like an MX for a launch
vehicle.  It's solid fueled, and thus doesn't have problems
with having to deal with fuel loading and such.  Of course, it's
payload capacity is limited, and it's design would have to be modified
somewhat, but I believe the production line is still open, and
the basic launcher is a very stable design.

Since the MX was designed to be cold-launched, you could launch from
a silo, and have all the payload handling hardware and such close to the
ground and easy to work on, further reducing preparation time.  The
cold-launch capability means that the silo can be reused, and with
fast reload capability could launch a large number of payloads in a
small timeframe from a very limited facility...

I thought the Air Force had some plans for using some to replenish
communications satellites in a post-attack environment.

                    Thanks,
                       Milo

PS Usual disclaimers apply...

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

Date: 5 Apr 90 15:20:45 GMT
From: umich!umeecs!itivax!vax3.iti.org![e-mail]  (Allen W. Sherzer)
Subject: Space News for April 2-8 1990


From the April 2 issue of Space News.

Space News is published by by the Times Journal company. Rates
are $75 per year but there was a $50 intro rate. Send subscription
requests to:

  Times Journal Company
  Springfield Va 22159-0500

You can also call 703-750-8600 to charge with plastic.

--

Another article on the future of Orbital Science. The Wall Street Journal
put a real damper on their public offering. In a 1988 Fortune interview OSI
officials said they would have revenue of $60 mil and turn a profit. However,
papers filed with the SEC for the offering said they had revenue of $35.1
million with a $5.8 million loss. The Wall Street article mentioned this
which caused some large investors to back out. OSI is required by its lenders
to maintain a specific net worth and they need the offering to keep this up.

If the Wednesday launch fails, the offering will be postponed. This may
or may not spell the end of the company. They have revenue from DoD and
there is the potential of more investment by other companies.

--

The US Defense Space Council, a group of senior Pentagon officials involved
in space matters, has given a cautious endorsement to the moon Mars
exploration program. The council is expected to be critical of NASA's
initial approaches thinking they are too conservative. The evaluation goes
beyond technical issues by urging the administration to define the issue to
capture the imagination of the average US citizen.

--

SDIO has issued an RFP to start a program to build a reusable fleet of
spacecraft for deploying the SDI defense system. Awards of up to five
contracts for basic design will be given later this year. SDIO will
consider vertical or horizontally launched rockets as well as piloted
or automatic systems.

The program will go in three phases:

Phase 1: Three to five contractors will conduct ten month design studies
         ending with a "risk reduction demonstration". This demonstration
         would be something like a wind tunnel test.

Phase 2: Two or more contractors from phase 1 will build a suborbital vehicle
         to test the technology. A key aspect of this test will be how
         quickly the vehicle can be serviced between launches.

Phase 3: Two or more contractors from phase 2 will build full scale
         demonstrations

A production decision will follow phase 3.

[This is not as good as doing total private development, but it is the next
best thing. SDIO is the only agency in the government which MUST HAVE low
cost to orbit. This makes them the only agency with the need to do it right.]

--

The Earth Observation Satellite Co. which operates Landsat expects to
sign a deal to sell Soviet Soyuzkarta satellite images in North and South
America.

--

China will launch its first western built satellite if the April 7 launch
of Asiasat goes on schedule. The US and french built satellite will be
launched on a Long March and will provide telecommunication services for
countries from Japan to the Mediterranean.

--

Japan has made a major trade concession in a dispute on its CS-4 satellite.
Japan was claiming that the CS-4 was a R&D project and so would not be open
to international bidding. The US countered that it was primarily a commercial
satellite. Japan will now break up CS-4 into two separate satellites, one for
commercial uses (and open to international bidding) and the other a R&D
satellite to test relay and tracking systems.

--

NASA officials told congress that changes needed to reduce EVA requirements
for the station will not boost cost. NASA plans to address the EVA problem
by moving some instruments to pressurized environments, making some parts
robot servicable, and using more reliable hardware. Members of Congress are
not convinced that a redesign won't be needed. Rep. Roe (D-NJ), chairperson
of the House authorization committee for NASA warned that another costly
station redesign would cause NASA "to lose [the support of] this entier
committee".

--

The USSR is preparing to launch its Kristall module for the Mir space
station on April 9. This module is similar to the Kavant 2 module which
went up last December. The major difference is that while Kavant had
an airlock for Cosmnauts to conduct EVA, Kristall has a docking port
for Buran.

Kristall contains six furnaces that will be used to produce alloys and
semiconductors. It also contains four electrophoresis chambers which will
be used to manufacture pharmaceuticals.


-----------------------------------------------------------------------------
| Allen W. Sherzer         |         If guns are outlawed,                  |
|   [e-mail]            |         how will we shoot the liberals?        |
-----------------------------------------------------------------------------

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

Date: 5 Apr 90 12:39:39 GMT
From: sppy00![e-mail]  (Christopher Schaller)
Subject: STS26 program

About a week ago, I recieved a copy of the STS26 program that has been
circulating. What version of ZIP do you use to uncompress this.

                  Thankyou.

                      Chris.

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

Date: 5 Apr 90 10:17:10 GMT
From: usc!zaphod.mps.ohio-state.edu!sunybcs!ubvms.cc.buffalo.edu![e-mail]  (Craig L Cole)
Subject: Need info on Space Stations

I hope someone can help me:

I need the interior volume and orbital height of the following space
stations:

                  Skylab
                  Salyut  (are any of them still functional?)
                  Mir
                  Freedom
                  Industrial Space Facility

A breakdown of the size of each module in Mir and Freedom would be
greatly appreciated. Also, the interior volume of the shuttle and
a good guess at the interior volume of a Moonbase and a Mars
base would also be greatly appreciated.

Thanks in advance -                Craig Cole
                                   University at Buffalo

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

Date: 5 Apr 90 16:39:48 GMT
From: nyevax.cas.orst.edu![e-mail]  (Bart_Eleveld)
Subject: orbit definitions

Would some kind soul(s) out there post definitions for the various types of
orbits that are often talked about on the net; e.g., Clarke, geosynchronous,
geostationary, and any others you might wish to add.  Also, how much more
energy (in relative terms) does it take to launch a payload to the west, or
to the poles (N or S) rather than to the east?
Thanks
Bart Eleveld
[e-mail]

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

Date: 5 Apr 90 16:38:30 GMT
From: sco![e-mail]  (Stacey Campbell)
Subject: Re: Seeing the Jupiter picture (Was Re: HST Image Status)

In article <[e-mail]> [e-mail] (Patty Winter) writes:
>In article <[e-mail]> [e-mail] (David Hafken) writes:
>>Hi. could someone tell me how to view the jupiter picture posted earlier
>
>Here's how I did it.

I would like to publicly thank Hubble for returning from the grave to
point his fine telescope at Jupiter and post the high quality PostScript
image.
--
Stacey Campbell {uunet,ucscc,att,microsoft,wyse}!sco!staceyc [e-mail]

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

Date: 6 Apr 90 05:24:02 GMT
From: agate!agate![e-mail]  (William Baxter)
Subject: Re: National Space Society


In article <[e-mail]> [e-mail] (Dave Smith) writes:

>[Stupid survey from NSS lacks only scratch-'n-sniff boxes]

NSS uses the results of these surveys in their attempts to convince
Congress that the only problem with NASA is lack of funds.  Send a copy
of the survey and your remarks about it to your congressman.  He
represents you.  Keep him informed.

--
William Baxter

ARPA: web@{garnet,brahms,math}.Berkeley.EDU
UUCP: {sun,dual,decwrl,decvax,hplabs,...}!ucbvax!garnet!web

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

End of SPACE Digest V11 #227
*******************