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1993-07-13
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Date: Sat, 13 Feb 93 18:37:07
From: Space Digest maintainer <digests@isu.isunet.edu>
Reply-To: Space-request@isu.isunet.edu
Subject: Space Digest V16 #177
To: Space Digest Readers
Precedence: bulk
Space Digest Sat, 13 Feb 93 Volume 16 : Issue 177
Today's Topics:
Are Landsat Satellites receivable?
extreme responses to Challenger transcript (2 msgs)
flashlights aboard the shuttle?
HRMS/SETI Update?
Nobody cares about Fred? (was Re: Getting people into Space Program!)
parachutes on Challenger?
Pegasus orbit
PEGASUS QUESTION
Solar Sail Nits
SSF Petition
SSTO news (3 msgs)
U.S., Russian Rovers Take Their First Run Together
wind on the moon?
World View Imaging Corp.
Welcome to the Space Digest!! Please send your messages to
"space@isu.isunet.edu", and (un)subscription requests of the form
"Subscribe Space <your name>" to one of these addresses: listserv@uga
(BITNET), rice::boyle (SPAN/NSInet), utadnx::utspan::rice::boyle
(THENET), or space-REQUEST@isu.isunet.edu (Internet).
----------------------------------------------------------------------
Date: 12 Feb 1993 22:29:12 GMT
From: Doug Mohney <sysmgr@king.eng.umd.edu>
Subject: Are Landsat Satellites receivable?
Newsgroups: sci.space
In article <1lh6ie$ck6@s1.gov>, jtk@s1.gov (Jordin Kare) writes:
>Just for the net's amusement, I was at a conference on Geological
>Remote Sensing this past week, and the Russians had a booth there
>offering their satellite imagery for sale. As of that meeting, they
>announced that they were offering declassified photo imagery with
>2 meter (yes, 2 meter) resolution for sale; the price was approx.
>$2500 for a 20 km x 20 km image.
Do you think they could get some pics of certain areas in Nevada photographed?
Certain U.S. classified government areas? *heh*.
Or would the import of said pictures with possible views of experimental
aircraft be prohibited under some funky law to spoil my fun?
"Yes, night, IR, we're looking for a really hot
object sitting on the ground... yah, let me see
if this coordinates with the 'sky ripping apart'
noise times...."
I have talked to Ehud, and lived.
-- > SYSMGR@CADLAB.ENG.UMD.EDU < --
------------------------------
Date: Thu, 11 Feb 93 19:26:28 PST
From: Jason Cooper <lord@tradent.wimsey.com>
Subject: extreme responses to Challenger transcript
Newsgroups: sci.space,sci.astro,alt.privacy,comp.org.eff.talk
> Let me see if I've got this. As an anonymous poster, you think he is
> entitled to post any sort of stupid drivel that he cares to, but that
> people ought not to be permitted to post flames toasting him for being
> an idiot? Sorry, if he doesn't like the flames (or knowing what
> peoples' opinions of him are -- no 'flame' required; he's an idiot),
> then he has the options of not acting like an idiot or of hitting 'N'
> himself. Seems more than equitable to me.
>
> --
> "Insisting on perfect safety is for people who don't have the balls to live
> in the real world." -- Mary Shafer, NASA Ames Dryden
> -----------------------------------------------------------------------------
> Fred.McCall@dseg.ti.com - I don't speak for others and they don't speak for m
I never said you SHOULDN'T flame him; I said that there's no reason TO
flame him. If you don't like his ideas, hit 'N'. If you do, read. Just
because you don't like a guy's ideas is no reason to call him an IDIOT.
By doing so you're proving that that's exactly what YOU are.
Jason Cooper
------------------------------
Date: Thu, 11 Feb 93 19:29:19 PST
From: Jason Cooper <lord@tradent.wimsey.com>
Subject: extreme responses to Challenger transcript
Newsgroups: sci.space,sci.astro,alt.privacy,comp.org.eff.talk
> > Let me see if I've got this. As an anonymous poster, you think he is
> > entitled to post any sort of stupid drivel that he cares to, but that
> > people ought not to be permitted to post flames toasting him for being
> > an idiot? Sorry, if he doesn't like the flames (or knowing what
> > peoples' opinions of him are -- no 'flame' required; he's an idiot),
> > then he has the options of not acting like an idiot or of hitting 'N'
> > himself. Seems more than equitable to me.
> >
> > --
> > "Insisting on perfect safety is for people who don't have the balls to live
> > in the real world." -- Mary Shafer, NASA Ames Dryden
> > ---------------------------------------------------------------------------
> > Fred.McCall@dseg.ti.com - I don't speak for others and they don't speak for
I must add, as a second message, that if he was posting that because he
gets high on watching others freak, you're doing a DAMN good job of
satisfying him!
Jason Cooper
------------------------------
Date: 12 Feb 93 15:47:23 GMT
From: Frank Reid <reid@ucs.indiana.edu>
Subject: flashlights aboard the shuttle?
Newsgroups: sci.space
What kind of flashlights are used aboard the shuttle? Are there
special NA$A $pace-qualified fla$hlight$, or do they use
something more mundane?
--
Frank reid@ucs.indiana.edu
------------------------------
Date: 12 Feb 93 22:34:03 GMT
From: Rod Beckwith <rodb@slugo.corp.sgi.com>
Subject: HRMS/SETI Update?
Newsgroups: sci.space
Hello all,
Is there any new or compelling information from this project. They (NASA)
has had quite a few months to observe..........what's going on?
I feel they should post updates just as the other programs do. It would be
nice to know what we are getting for our MONEY!
Let me know by email or post.
Thanks,
Rod
--
Rod Beckwith |$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$| The
Datacom I/S |"The great obstacle of progress is not ignorance,| Nite
rodb@corp.sgi.com|but the illusion of knowledge." | Net
|$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$|
Knight
------------------------------
Date: 12 Feb 93 04:04:24 GMT
From: Bill Higgins-- Beam Jockey <higgins@fnalf.fnal.gov>
Subject: Nobody cares about Fred? (was Re: Getting people into Space Program!)
Newsgroups: sci.space
In article <1993Feb12.134548.15175@iti.org>, aws@iti.org (Allen W. Sherzer) writes:
> In article <C2BDrG.B5y@zoo.toronto.edu> henry@zoo.toronto.edu (Henry Spencer) writes:
>
>>The question is, if only $4G is available, is it more important to keep a
>>small fraction of them employed, or to get a functional space station?
>
> Come now Henry, NASA spent over $8 billion designing a space station
> which couldn't have ever been built. It should be obvious that very
> few people actually care if a space station is ever built.
This is massively unfair to both the leadership of NASA and the troops
in the trenches-- including all the people on the Net who are working
on SSF and things that support it.
You may hold the opinion that they are deluded, wasteful, or foolish.
But they are NOT apathetic. The real people working on this thing
*really want to see it fly*. Managers who have gone before Congress
again and again for ten years to fight for Fred are not doing it to
make contractors fatter. They're doing it because they believe
America needs a space station.
You want to change things. I think insulting people is a mighty poor
way to do it.
If you want them to come around to your way of thinking, you need to
earn their respect.
O~~* /_) ' / / /_/ ' , , ' ,_ _ \|/
- ~ -~~~~~~~~~~~/_) / / / / / / (_) (_) / / / _\~~~~~~~~~~~zap!
/ \ (_) (_) / | \
| | Bill Higgins Fermi National Accelerator Laboratory
\ / Bitnet: HIGGINS@FNAL.BITNET
- - Internet: HIGGINS@FNAL.FNAL.GOV
~ SPAN/Hepnet: 43011::HIGGINS
------------------------------
Date: 12 Feb 93 16:13:05 GMT
From: fred j mccall 575-3539 <mccall@mksol.dseg.ti.com>
Subject: parachutes on Challenger?
Newsgroups: sci.space
In <1425@taniwha.UUCP> paul@taniwha.UUCP (Paul Campbell) writes:
>In article <1993Feb5.231836.23346@mksol.dseg.ti.com> mccall@mksol.dseg.ti.com (fred j mccall 575-3539) writes:
>>some training jets, the front seat has to go *first*. There is a
>>story, perhaps untrue (my memory isn't good enough to recall where I
>>heard it), of a pilot-instructor who got himself cut in half by
>>reaching up over a student to pull down his handle after the student
>>blacked out. The student got out. The instructor got a (posthumous)
>>medal.
>How could they tell if there's no one around who was concious at the time?
Ever hear of radio?
--
"Insisting on perfect safety is for people who don't have the balls to live
in the real world." -- Mary Shafer, NASA Ames Dryden
------------------------------------------------------------------------------
Fred.McCall@dseg.ti.com - I don't speak for others and they don't speak for me.
------------------------------
Date: 12 Feb 93 07:58:55 PST
From: Frank Knight <15160@rhodes.aero.org>
Subject: Pegasus orbit
Newsgroups: sci.space
In article <1le72fINNdf@gap.caltech.edu>, palmer@cco.caltech.edu
(David M. Palmer) writes:
> I called up Orbital Sciences Corp. and got preliminary orbit
> data on the launch of the Brazillian satellite:
>
>
> PRELIMINARY:
> Perigee x Apogee: 405 x 416 nautical miles
> Target: 405x405 nm (cirrcular)
>
> Inclination: 24.98 degrees
> Target: 25 degrees
>
> Next flight, launching ALEXIS, expected in April.
>
Yes, but I believe this was from the Pegasus IMUs. NORAD track
was more like 398 nm x 417 nm, if I'm remembering the numbers
correctly. But this is still pretty close.
----------------------------------------------------------------
Frank Knight Tele: (310)-336-1917
The Aerospace Corporation FAX: (310)-336-1314
PO Box 92957 (MS M5-120) Email:
Los Angeles, CA 90009 KNIGHT@DIRAC2.DNET.NASA.GOV
or 15160@RHODES.AERO.ORG
----------------------------------------------------------------
------------------------------
Date: Fri, 12 Feb 1993 02:37:55 GMT
From: Gary Coffman <ke4zv!gary>
Subject: PEGASUS QUESTION
Newsgroups: sci.space
In article <ofSKHn600WB50Cw3lF@andrew.cmu.edu> Lawrence Curcio <lc2b+@andrew.cmu.edu> writes:
>Why a winged rockets?
>
>(Just thought I'd come right out and ask :)
Lift is more efficient than thrust. The bulk of a rocket's fuel is
expended getting out of the atmosphere. If you can eliminate some
of that fuel by using aerodynamic lift, you can carry more payload
to orbit.
Gary
--
Gary Coffman KE4ZV | You make it, | gatech!wa4mei!ke4zv!gary
Destructive Testing Systems | we break it. | uunet!rsiatl!ke4zv!gary
534 Shannon Way | Guaranteed! | emory!kd4nc!ke4zv!gary
Lawrenceville, GA 30244 | |
------------------------------
Date: 12 Feb 93 16:09:06 GMT
From: fred j mccall 575-3539 <mccall@mksol.dseg.ti.com>
Subject: Solar Sail Nits
Newsgroups: sci.space
In <C24yoE.A3v.1@cs.cmu.edu> 18084TM@msu.edu (Tom) writes:
>>>Further nit: If light has momentum and protons have a wavelength,
>>>how do you classify one as wind and not the other? They are both
>>>"stuff emitted from the sun at supersonic velocities" after all.
>>>(Yes, I know the light gives greater momentum, and that the def. of
>>>solar wind is "Protons from the sun". But it is a rather arbitrary
>>>def., isn't it?)
>>Can you say "rest mass"?
>Sure: "Rest mass" :-) Let me try a sentence: "A photon has a rest-mass
>based on momentum, since it *never rests*." BTW, neither does a solar-
>wind proton, at least not where we mess with them. When it rests, it's
>just a 'plain-ol' proton, or 'interstellar hydrogen', not 'solar
>wind'.
Cute sentence. Now repeat after me. "Solar wind is made up of only
things which have a rest mass greater than zero."
>So, you've got a good basis for the fundamental difference in photons
>and protons, besides just their behavior or appearance, but that doesn't
>mean the definition of 'solar wind' is any less arbitrary when you base
>it's definition upon one specific particle.
'Wind' is made up of particles which have rest mass, just like 'wind'
in the atmosphere doesn't include sunlight because 'wind' is made up
of particles which have rest masses. Now, if that seems arbitrary to
you, then the only further follow-up would seem to be that *ALL* words
have 'arbitrary' meanings, because they were defined long ago to mean
what they mean and no amount of complaint will change that.
--
"Insisting on perfect safety is for people who don't have the balls to live
in the real world." -- Mary Shafer, NASA Ames Dryden
------------------------------------------------------------------------------
Fred.McCall@dseg.ti.com - I don't speak for others and they don't speak for me.
------------------------------
Date: Fri, 12 Feb 1993 23:44:25 GMT
From: tomas o munoz 283-4072 <munoz@sweetpea.jsc.nasa.gov>
Subject: SSF Petition
Newsgroups: sci.space,talk.politics.space
This message is posted on behalf of the Space Station Freedom Fighters.
Thanks in advance for your cooperation.
========================================================================
Dear Citizen:
Space Station Freedom Fighters is a grassroots movement dedicated to ensuring
the completion of Space Station Freedom and AmericaUs future in space. We
want Congress to understand that the American people support continued,
vigorous exploration of space.
You can make a difference. How? Follow these simple instructions:
1. Make copies of this blank petition and distribute the copies to your
friends, neighbors, and relatives.
2. Send copies to your friends and relatives in other states.
3. Collect as many signatures as you can, but send the petitions to the
Freedom Fighters even if they contain only one signature. Our
movement's goal is to submit to Congress at least one million
signatures.
4. Make a copy of your signed petitions to show your friends that you've
done your part!
5. Return the signed petitions to:
Space Station Freedom Fighters
16582 Space Center Blvd.
Houston, Texas 77058
6. Watch the news. When we present the petition you'll know you help
save Space Station Freedom and AmericaUs future in Space!
Thanks for your support!
Space Station Freedom Fighters
=============================================================================
PETITION FOR SPACE STATION FREEDOM
We the people of the United States of America petition the Congress and
President of the United States in support of Space Station Freedom. We
respectfully demand full, stable, multi-year funding necessary to establish,
in orbit, the Permanently Manned Capability Space Station Freedom and to
do so by the end of the decade.
Signature Name (Print Neatly) Address City, State Zip Code
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
Returned signed petitions to:
Space Station Freedom Fighters
16582 Space Center Blvd.
Houston, TX 77058
Fax (713) 488-7903
Reproduction of this petition, as is, is permitted and enthusiastically
encouraged.
--
========================================================================
Tom Munoz | munoz@sweetpea.jsc.nasa.gov
Thought for the day [plagiarized from someone else]:
Engineers think equations are an approximation of reality.
Physicists think reality is an approximation of the equations.
Mathematicians never make the connection.
========================================================================
------------------------------
Date: Sat, 13 Feb 1993 00:21:47 GMT
From: gawne@stsci.edu
Subject: SSTO news
Newsgroups: sci.space
In article <schumach.729524897@convex.convex.com>,
schumach@convex.com (Richard A. Schumacher) writes:
> There wouldn't be anyone in NASA who would like to see SSTO fail,
> would there? Nahh, of course not. Silly me.
> (For the record: I believe that this is an honest foul-up and not
> an instance of NASA trying to delay DC-X. Better evidence would be
> required to convince me that any NASA official would attempt such
> a thing.)
It's not exactly a NASA official being quoted, but consider this tidbit
from today's "What's New":
from: WHAT'S NEW Friday, 12 Feb 1993 Washington, DC
[concerning funding for SSF:]
Congressman Brown told reporters he will urge President Clinton to
restore full funding when he meets with him later today. To
scientists who oppose the station, Brown said the science aspect
was always overrated; the space station, he said, "is like
building the pyramids, it will glorify the nation." What
alternative cuts would he suggest? "I would cut $3.5B out of the
Strategic Defense Initiative." [remainder deleted]
Now I know that SDIO is the sponsor of DC-X. Is that $3.5B a close
approximation of DC's budget?
-Bill Gawne, Space Telescope Science Institute
"Forgive him, he is a barbarian, who thinks the customs of his tribe
are the laws of the universe." - G. J. Caesar
------------------------------
Date: Sat, 13 Feb 1993 00:03:33 GMT
From: kjenks@gothamcity.jsc.nasa.gov
Subject: SSTO news
Newsgroups: sci.space,talk.politics.space
: >Rich Kolker (rkolker@sccsi.com) wrote:
: >: MacDAC is renting the White Sands range and a static test stand at
: >: it from NASA. That is NASA's only connection (at this point) to DC.
I replied:
: >"NASA's only connection" and we're causing a schedule slip! Boy, am I
: >embarrassed!
With sarcasm on high, Richard A. Schumacher (schumach@convex.com) shot back:
: There wouldn't be anyone in NASA who would like to see SSTO fail,
: would there? Nahh, of course not. Silly me.
No, there probably isn't anybody in NASA who would like to see SSTO
fail. In fact, most of the people I've talked to about it haven't even
heard of the Delta Clipper project. But they've been unwaveringly
interested in it and enthusiastic about the prospects. You see, most
of us in NASA truly want better access to space. (Imagine that.)
Contractors may be a different matter, but most people work in the
space program *not* just because the pay is good. Most of us are
here because we care.
Richard A. Schumacher (schumach@convex.com) continued parenthetically:
: (For the record: I believe that this is an honest foul-up and not
: an instance of NASA trying to delay DC-X. Better evidence would be
: required to convince me that any NASA official would attempt such
: a thing.)
Sigh. We civil servants are much maligned.
-- Ken Jenks, NASA/JSC/GM2, Space Shuttle Program Office
kjenks@gothamcity.jsc.nasa.gov (713) 483-4368
"[I swear] I will support and defend the Constitution of the
United States against all enemies, foreign and domestic; that I
will bear faith and allegiance to the same; that I take this
obligation freely, without any mental reservation or purpose of
evasion; and that I will well and faithfully discharge the duties
of the office on which I am about to enter. So help me God."
-- Standard Form 61, Appointment Affidavits, the oath taken
by all new Federal employees.
------------------------------
Date: Fri, 12 Feb 1993 13:48:17 GMT
From: "Richard A. Schumacher" <schumach@convex.com>
Subject: SSTO news
Newsgroups: sci.space,talk.politics.space
>Rich Kolker (rkolker@sccsi.com) wrote:
>: MacDAC is renting the White Sands range and a static test stand at
>: it from NASA. That is NASA's only connection (at this point) to DC.
>"NASA's only connection" and we're causing a schedule slip! Boy, am I
>embarrassed!
There wouldn't be anyone in NASA who would like to see SSTO fail,
would there? Nahh, of course not. Silly me.
(For the record: I believe that this is an honest foul-up and not
an instance of NASA trying to delay DC-X. Better evidence would be
required to convince me that any NASA official would attempt such
a thing.)
------------------------------
Date: 12 Feb 1993 22:54 UT
From: Ron Baalke <baalke@kelvin.jpl.nasa.gov>
Subject: U.S., Russian Rovers Take Their First Run Together
Newsgroups: sci.space,sci.astro,alt.sci.planetary,comp.robotics
From the "JPL Universe"
February 12, 1993
U.S., Russian rovers take their first run together
By Karre Marino
A lunchtime crowd gathered Jan. 29 for a demonstration of
the Russian planetary rover, called Marsokhod, and JPL's
mini-rover, Rocky IV, both of which will head for Mars in
separate missions in late 1996.
The demonstration was spur of the moment, according to Donna
Pivirotto, the Microrover team leader. "It was really just a bit
of fun for everyone," she said. "We exchanged information and
essentially were able to verify for the Russians that they were
on the right track.
"We actually came away with a general feeling that they
think what we're doing is very interesting, but at the same time,
they didn't appear to want to use our technology. They'd prefer
we give them money or buy their products."
The rovers were strikingly different in appearance, as the
Russian effort, at 80 kilograms, was several times larger than
the JPL prototype, which weighs 7 kilograms. Marsokhod (Russian
for Mars rover) is 60 centimeters (24 inches) wide by 90
centimeters (36 inches) long, and has six cone-shaped titanium
wheels. It runs on RTG (nuclear) power of 20 watts.
Rocky IV is 61 centimeters (24 inches) long by 38.5
centimeters (15 inches) wide by 36 centimeters (14 inches) high.
It has six 13- centimeter (5-inch) diameter wheels made of strips
of stainless steel foil, which offer stability and mobility;
cleats provide traction.
Rocky runs on 5 watts of solar energy, which is used during
the day to power the electronics, stored inside a warm electronic
box. At night, the electronics are turned off, and the keep-alive
batteries run the unit, Pivirotto explained. "The idea is that
the electronics get warm enough during the day and while they
cool down at night, it doesn't cause problems. Batteries also
enable us to run science instruments at night, or if Rocky is
driving along and goes into a shadow, the batteries -- which are
non-rechargeable flashlight types -- drive us out. They also aid
in climbing, providing an added boost to get over a big rock."
The microrover uses Ackerman steering, Pivirotto noted.
"It's like your car; one wheel turns the same way the other wheel
turns. It tracks without skidding." However, Marsokhod uses skid
steering; the left and rightside wheels turn in opposite
directions. The rover can turn sharply, but it takes more energy
to do so, she said.
Rocky, which is controlled by a Macintosh Powerbook,
features sensors that help it avoid cliffs, dropoffs or excessive
slopes (though the rover can ascend slopes of 26 degrees). An
on-board visible infrared spectrometer and color camera will
record and send back images and rock spectra, while a chipper is
designed to remove a thin layer of rock surfaces and may
determine if Mars' "rocks" weather as Earth's rocks do. A
soft-sand scoop takes soil samples, and a video and radio modem
transmit data and images. The rover can also place a seismometer
on the surface.
Pivirotto noted that just as the two rovers designs are
different, so too are the nations' approaches to testing and
building prototypes. "(The Russians) are very empirical in their
work. Their philosophy is not one of system engineering -- as
ours is. They don't have much analysis. They build it and try it,
which means they'll make lots of changes. We do more
requirements, design and analysis before we build."
The Russian philosophy, she admitted, has led to failure
with all of their Mars missions, but success with each Venus
mission. "The problem seems to be in the design of the landing
system. That's why they expressed interest in our dynamicists
talking to theirs."
Information exchange was not the only success of the
demonstration here. The exercise itself gained high marks. Both
rovers made impressive runs, up stairs and across constructed
barriers, as audience members applauded. Then the prototypes
headed for the pit behind Visitor Control, maneuvering over
grass, boulders, pebbles -- and, at times -- each other. (The
large Marsokhod ran into a small Russian lunar rover.) As
expected, Marsokhod handled the large boulders with ease, while
Rocky IV struggled; of course, a few times, seeming to have a
mind of its own, and being the innovation of Americans, the
micro-rover simply went around a large boulder that seemed like
so much bother!
Rocky IV is part of the Mars Environmental Survey (MESUR)
project, which will place a network of landers, each equipped
with a seismometer, in varying locations on the Martian surface.
Recordings of Marsquakes by seismometers at different locations
will help determine the internal structure of the Red Planet.
Deployment of the network is planned for three Mars launches.
The demonstration continued what have been informal
discussions between American and Russian scientists and
engineers, as they explore possible opportunities for future
cooperation between the two nations in planetary studies.
The seven-member Russian team was curious about more than
scientific data, said Pivirotto. "They wanted to know about our
lifestyle. They thought it was interesting that I owned my own
home. They were also big fans of pizza and Budweiser."
###
___ _____ ___
/_ /| /____/ \ /_ /| Ron Baalke | baalke@kelvin.jpl.nasa.gov
| | | | __ \ /| | | | Jet Propulsion Lab |
___| | | | |__) |/ | | |__ M/S 525-3684 Telos | Never yell "Movie!" in a
/___| | | | ___/ | |/__ /| Pasadena, CA 91109 | crowded fire station.
|_____|/ |_|/ |_____|/ |
------------------------------
Date: Fri, 12 Feb 1993 18:29:23 GMT
From: "Ray Swartz (Oh, that guy again" <rls@uihepa.hep.uiuc.edu>
Subject: wind on the moon?
Newsgroups: sci.space
In article <ldsoderb.729538124@reading>, ldsoderb@susssys1.reading.ac.uk (David S. Oderberg) writes:
>Is there anyone out there - perhaps from JPL? - who might solve the
>following problem. I am aware that there is supposed to be no wind
>on the moon, since there is no atmosphere. There is certainly
>no wind capable of blowing a flag. On the well-known "one small
>step for man" film, the flag stands bolt upright, held up, it
>is said, by wire supports.
>
>So far so good. But I _also_ recently saw film, said by the presenter
>(a non-NASA physicist) to be NASA film of an Apollo mission, 11 if I
>recall (not sure), in which the US flag FLUTTERS as if in a strong
>breeze. It well and truly WAVES and FLAPS as surely as it would have
>had it been in a strong breeze on Earth. I cannot recall for certain
>whether it was a colour film, but I _think_ so. It was of higher
>quality than the "one small step" grainy b&w film.
If you notice, that film was shot from above, and throughout the 5 or
so seconds, from an increasing height. What this film shows is the flag
reacting to the rockets on the lunar module as the module was taking off from
the lunar surface. In a sense, the rocket exhaust could be considered a
"wind", of a very short duration. Other than at that event, the flag was quite
stationary in all of the films I saw (and I NEVER pass up an opportunity to see
them).
Raymond L. Swartz Jr. (rls@uihepa.hep.uiuc.edu)
================================================================================
Excel in everything -- specialization is for insects!! (paraphrase of R.H.)
Fantasy: Wave soaring over Olympus Mons on Mars
================================================================================
------------------------------
Date: 12 Feb 1993 22:23:51 GMT
From: Doug Mohney <sysmgr@king.eng.umd.edu>
Subject: World View Imaging Corp.
Newsgroups: sci.space
From the NY Times, February 12, 1993, page D3:
Worldview Imaging Corp, based in Oakland, CA, has been licensed by NOAA and DoD
to launch a series of photo sats with resolution under 3 meters. If all goes as
planned, the first small sat (doesn't say how small) will go up in 1996, with
more satellites gradually added.
Founded by Walter Scott (I wonder if Jordan K. knows him), a former head of
"Brilliant Eyes/Brilliant Pebbles" initiatives at Livermore AND Doug
Gerull, an exec at Intergraph Corp.
Eventually, you'll be able to directly dial up images and view 'em on your PC/
workstation.
No pricing numbers yet.
Of course they have to build & launch the sat first :)
I have talked to Ehud, and lived.
-- > SYSMGR@CADLAB.ENG.UMD.EDU < --
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From: Jason Cooper <lord@tradent.wimsey.com>
Newsgroups: sci.space
Subject: ** LASER AIMING **
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Date: Thu, 11 Feb 93 22:06:32 PST
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I know that this is probably not the perfect place for this, but since I
am getting the most help on my Bussard Ramscoop project from here, I'll
ask here. Does anybody in this group know of a way to direct a laser
beam, by mechanism or otherwise, to any given point to, say, within 45
degrees of straight on x or y axis? I'm talking about something with the
CAPABILITY of pointing the laser at a given point within that angle.
What I need this for is to aim a laser at any large object headed for the
ramscoop, so as to destroy that object (hopefully, into particles small
enough to ionize). I seem to remember seeing a system of mirrors
somewhere capable of such a thing, but can't remember the configuration.
Something like the way an electron beam is aimed in a TV, but with a
laser (not that the methods are related, but the results are the same).
Jason Cooper
Thanks!
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End of Space Digest Volume 16 : Issue 177
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