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Date: Tue,  1 Jan 1991 03:14:19 -0500 (EST)
Subject: SPACE Digest V12 #706

SPACE Digest                                     Volume 12 : Issue 706

Today's Topics:
		      Re: More Launch Cost Data
		       LSAT-5 Update - 12/17/90
		    Re: pressure-altitude relation
		    Re: pressure-altitude relation
			      Pioneer 6
		 WIN A SPACEFLIGHT TO MIR!!!!!!!!!!!!
		  Internet address for NASA elements
	     NASA Headline News for 12/14/90 (Forwarded)

Administrivia:

    Submissions to the SPACE Digest/sci.space should be mailed to
  space+@andrew.cmu.edu.  Other mail, esp. [un]subscription notices,
  should be sent to space-request+@andrew.cmu.edu, or, if urgent, to
			 tm2b+@andrew.cmu.edu

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Date: Mon, 17 Dec 90 12:51:15 -0500
From: "Allen W. Sherzer" <aws@iti.org>
To: space+@andrew.cmu.edu
Subject: Re: More Launch Cost Data
Newsgroups: sci.space
In-Reply-To: <1900.2768F8DB@ofa123.fidonet.org>
Organization: Evil Geniuses for a Better Tomorrow
Cc: 

In article <1900.2768F8DB@ofa123.fidonet.org>:

|   It was recently announced that McDonnell Douglas Space Systems 
|Co. (MDSSC) has won a $140.6 million contract with NASA to provide 
|Delta II launch services for upcoming NASA science missions (Source:  
|NASA news release).  The basic contract is for the launch of 3 satellites...

Another data point would be the launch of two SDI payloads (RME and LACE)
using a single Delta II on Feb. 14. This launcher was procured in a totally
commercial manner (some of my sources say NASA should use it as
a model).

According to Avation Week (Feb. 19, 1990 page 24) SDIO paid only
$38 million for launch services. Dispite the fact that SDIO only
bought one launch compared to NASA's three they still got it for
~20% less. SDIO estimates that the same launch would cost $13 to $17
million more if it was an Air Force procurement.

|   Editorial Comment:  This gives us a basis for a cost per pound 
|for the Delta II launch vehicle.  Rated performance of a Delta II is 
|about 11,110 lbs into a 100 nmi 28.5 deg circular orbit (Source: 
|MDSSC, "Delta II Fact Sheet").  For a commercial lot buy of 3 Delta 
|IIs, this is about $46.9M/launch or about $4218/lb.

Using the numbers from the SDIO commercial procurement we get a unit
cost of $38M and a payload of 11,110 pounds which gives $3420 per
pound to LEO. Again, about 20% less.

If SDIO bought in bulk they would have saved even more. I have read
(but can't remember the source) that Delta II's can be had for
$35 million each in quanity. This (if true) would bring cost down
to $3150/pound to LEO.

  Allen
-- 
+---------------------------------------------------------------------------+
| Allen W. Sherzer | If guns are outlawed, how will we shoot the liberals?  |
|   aws@iti.org    |                                                        |
+---------------------------------------------------------------------------+

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Date: 17 Dec 90 16:57:24 GMT
From: sdd.hp.com!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@ucsd.edu  (Ron Baalke)
Organization: Jet Propulsion Laboratory, Pasadena, CA.
Subject: LSAT-5 Update - 12/17/90
Sender: space-request@andrew.cmu.edu
To: space@andrew.cmu.edu


                          LSAT-5 Status Report
                           December 17, 1990
 
     An engineering test was performed with the LSAT-5 satellite and the
26 meter antenna in Australia on December 15.  The purpose of the test was
to validate the DSN (Deep Space Network) tracking capability of the backside
of the LSAT-5 TDRS pointing High Gain Antenna.  LSAT-5 has an anomaly in
that it cannot switch the downlink to the Earth pointing antenna.  This will
be the nominal DSN 26 meter emergency support configuration.  All objectives
of the test was met, and the engineering test was successful.
      ___    _____     ___
     /_ /|  /____/ \  /_ /|
     | | | |  __ \ /| | | |      Ron Baalke         | baalke@mars.jpl.nasa.gov
  ___| | | | |__) |/  | | |___   Jet Propulsion Lab | baalke@jems.jpl.nasa.gov
 /___| | | |  ___/    | |/__ /|  M/S 301-355        |
 |_____|/  |_|/       |_____|/   Pasadena, CA 91109 |

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

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Date: 16 Dec 90 23:17:19 GMT
From: hpda!hpcupt1!hpindwa!kinkley@ucbvax.Berkeley.EDU  (David Kinkley)
Organization: Hewlett-Packard, Cupertino CA
Subject: Re: pressure-altitude relation
References: <1990Dec16.061040.13677@athena.mit.edu>
Sender: space-request@andrew.cmu.edu
To: space@andrew.cmu.edu

/ hpindwa:sci.space / kinkley@hpindwa.cup.hp.com (David Kinkley) /  3:10 pm  Dec 16, 1990 /
/ hpindwa:sci.space / brndlfly@athena.mit.edu (Matthew T Velazquez) / 10:10 pm  Dec 15, 1990 /


>>>>>Depends on the atmospheric model you use. For the troposphere (valid 
>>>>>up to circa 20 km):

>>>>>P(sea level)/P(z) = [1-L/T(sea level)]^^gamma/(1-gamma)


>>>>For the stratosphere ( valid from c. 20 km - 50 km):

>>>>P(z) = P(sea level) exp(-gz/RT)

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

Thanks Matthew!  I haven't quite polished my climbing skills to the point
where I'm venturing into the stratosphere but *now* I'm prepared :-)

Plugging in numbers into the troposphere model I get a 0.48 bar pressure for
Mt Everest (29000 feet) assuming 300K at sea level.  Is this right I thought
it might be a bit less???

dave kinkley
kinkley@hpindwa.HP.COM

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

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Date: 16 Dec 90 23:10:08 GMT
From: hpda!hpcupt1!hpindwa!kinkley@ucbvax.Berkeley.EDU  (David Kinkley)
Organization: Hewlett-Packard, Cupertino CA
Subject: Re: pressure-altitude relation
References: <1990Dec16.061040.13677@athena.mit.edu>
Sender: space-request@andrew.cmu.edu
To: space@andrew.cmu.edu

/ hpindwa:sci.space / brndlfly@athena.mit.edu (Matthew T Velazquez) / 10:10 pm  Dec 15, 1990 /

In article 26774 of sci.space Dave Kinkley writes:

^could somebody give me a pressure-altitude relation...


	Depends on the atmospheric model you use. For the troposphere (valid 
up to circa 20 km):

	P(sea level)/P(z) = [1-L/T(sea level)]^^gamma/(1-gamma)

	This reads:

	P of sea level over P of altitude z equals (1 minus L over T of sea 
level) to the power of (gamma over 1 minus gamma).

	Where L = 6.5 kelvins/km altitude
	and gamma = 1.41 for air. 


For the stratosphere ( valid from c. 20 km - 50 km):

	P(z) = P(sea level) exp(-gz/RT)

	In SI units, Pressure is in Pascals and T is in kelvins. Pressure at
sea level is 1.013 x 10^^5 pascals.

	I'm too lazy to look up unit conversions for the rest of the stuff,
so I guess you're out of luck in that regard.

			T Velazquez
			MIT Aero/Astro
			brndlfly@athena.mit.edu
----------

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

Date: 17 Dec 90 18:08:53 GMT
From: rti!dg-rtp!magic!rice@mcnc.org  (Brian Rice)
Subject: Pioneer 6

Yesterday (Sunday, December 16) was the twenty-fifth anniversary
of the launch of Pioneer 6.  A wire service report in the
local paper says, "The probe was designed to relay measurements
from the other side of the sun [that's kind of like the dark
side of the moon, I guess :-) ] of magnetic fields, cosmic rays,
and solar wind particles."

No information was given about Pioneer 6's current venue or
status, but the blurb did say that Ames old-timers were planning
to tune it in for kicks today.  Here's hoping for a
"Pioneer 6 Status Report."
-- 
Brian Rice   rice@dg-rtp.dg.com   +1 919 248-6328
DG/UX Product Assurance Engineering
Data General Corp., Research Triangle Park, N.C.

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

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Date: 17 Dec 90 20:32:49 GMT
From: usc!zaphod.mps.ohio-state.edu!lavaca.uh.edu!jetson.uh.edu!cheehh@ucsd.edu
Organization: University of Houston
Subject: WIN A SPACEFLIGHT TO MIR!!!!!!!!!!!!
Sender: space-request@andrew.cmu.edu
To: space@andrew.cmu.edu



THE ULTIMATE                         For immediate release:
                                         10 am Mon. Dec 17 1990
  ADVENTURE                          

1-900-258-2MIR


       THREE TEXANS SEND "ORDINARY AMERICAN" TO SOVIET SPACE STATION

    Less than a year from now, someone will get the word he or she has been
selected to go into space to visit Mir, the Soviet space station orbiting the
Earth.

    It's the first time virtually everyone has a chance to become an
astronaut. The astronaut doesn't have to be a test pilot... or a scientist...
or compete against other candidates. It could be almost anyone from almost 
anywhere.  It could be you.

    The three men who've made it happen are Texans, all from suburban Houston.

    Their company, Space Travel Services Corp., is headquartered in the 
Clear Lake area of Houston, right across NASA Road 1 from the Johnson
Space Center, where the US manned space program is planned and managed. 
All three have close ties to the space program and share it's commitment to
putting and keeping people in space.

    David J. Mayer, president and chief executive officer of Space Travel,
studied physics at the University of Houston, where he was president of both
the University Space Society and University of Houston Students for the
Exploration and Development of Space. David has worked in computer system
development and construction in the NASA area. He lives in Webster, adjacent
to the NASA complex.

    His Space Travel co-founder, Howard L. Stringer, of Stafford, also has a
background in computer systems and other high-tech fields. He graduated cum
laude from the University of Texas and his Masters of Business Administration
is from UH. Howard, too, is active in organizations which support space
programs. He's a director of the Houston Space Society and has served as its
president, secretary and treasurer.

    The third member of Space Travel's management team is James E. Davidson,
senior vice president for marketing and business development, of Friendswood.
Jim graduated from Columbia University, then earned his MBA from Rice. He's
been working for companies planning commercial launches of space vehicles.
Davidson shares Mayer's and Stringer's commitment to keeping men and women in
space. He is, like Howard, a former treasurer and president of the Houston
Space Society and serves as a director of the group. Jim's a former director
of the National Space Society and is a senior associate of the Space Studies
Institute.

    The company has a contract with the Soviet space bureau to put an
American aboard a Soyuz space capsule with two cosmonauts and fly him or her
to Mir, the space station in orbit 400 kilometers above the Earth. (400 km
is about the distance from Space Travel's office to Dallas, but without the
traffic.)

    Anyone interested in the trip to space can call the Space Travel
information number,  1-900-258-2MIR  for details. There is a $2.99 charge
per call. Callers who wish to be considered as potential guest astronauts
for the flight may stay on the line and register at no additional charge.

    The selection will be made next December, when an independent judging
organization selects one person at random from among the registrants. That
person will have the option of taking a million-dollar cash prize or,
sometime in late 1992 or early 1993, riding a Russian rocket to the space
station, Mir. He or she will spend about a week in orbit and then return...
a permanent part of space history.

    "We don't know who that person will be," Mayer said, "and we've turned
over complete control of the selection to an outside firm. But it sure
wouldn't disappoint us any if that person turned out to be a fellow Texan."

                                - 30 -


-- 
-------------------------------------------------------------------------------
                .............                    |       Rikhit Arora
 And, while with silent, lifting mind I've trod  |    cheehh@uhupvm1.bitnet
    The high untrespassed sanctity of space,	 |       Arora@uh.edu
  Put out my hand, and touched the face of God.  |    ~~~~~~~~~~~~~~~~~~
-------------------------------------------------------------------------------

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

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Date: 18 Dec 90 00:50:32 GMT
From: sdd.hp.com!news.cs.indiana.edu!msi.umn.edu!cs.umn.edu!uc!nachos.SSESCO.com!SSESCO.com!elmquist@ucsd.edu  (Chris Elmquist)
Organization: none
Subject: Internet address for NASA elements
Sender: space-request@andrew.cmu.edu
To: space@andrew.cmu.edu

Someone sent e-mail asking for the actual internet address
for our NASA element set FTP site.  My e-mail is bouncing
to him, so I thought I'd post for the benefit of the net.

NASA element sets are available for anonymous FTP from:

	nachos.ssesco.com	[192.55.187.18]

in the directory:

	sat_elements/nasa

Please use your e-mail address as the anonymous password so
that we can trace network problems.

Thank you.

Chris

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

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Date: 17 Dec 90 19:33:29 GMT
From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov  (Peter E. Yee)
Organization: NASA Ames Research Center, Moffett Field, CA
Subject: NASA Headline News for 12/14/90 (Forwarded)
Sender: space-request@andrew.cmu.edu
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             Headline News
Internal Communications Branch (P-2) NASA 
Headquarters

  Friday, December 14, 1990	Audio Service: 202 / 755-1788

This is NASA Headline News for Friday, December 14, 1990

The turnaround operations at Dryden Flight Research 
Center to prepare Columbia for its flight back to the Kennedy 
Space Center are proceeding well.  Technicians have removed 
both Data Display Units which were problematic during the 
flight.  They are being flown back to  KSC for troubleshooting.  
The removal of the Ultraviolet Imaging Telescope's film has 
been rescheduled for early tomorrow morning.  The turnaround 
crew still expects to be able to fly Columbia on the first leg of its 
trip on Sunday morning.  The flight will make several refueling 
stops and will lay over at Kelly Air Force Base.

In the Orbiter Processing Facility Bay 1, Discovery is set for a 
brake anti-skid test today.  Yesterday, Discovery's nose wheel 
steering system was tested.  The vehicle is scheduled for roll 
over to the Vehicle Assembly Building at the end of January.

In OPF Bay 2, Atlantis' main engines have been removed 
and taken to the VAB engine shop for post-flight inspection and 
tests.

In the VAB, stacking operations for the solid rocket boosters for 
the STS-39 mission are nearing completion.  Both forward 
assemblies have been mated and closeout activities now are 
underway on all the field joints.


CORRECTION:  Thursday's Headline News inaccurately 
indicated that the STS-35 post mission crew press briefing was 
to have occurred yesterday.  The STS-35, Astro-1, post-flight 
crew press conference will take place at the Johnson Space 
Center, next Thursday, Dec. 20, at 2:00 pm EST.  It will be 
carried live on NASA Select TV.


The following are some of the office Christmas parties which 
have been posted:

	Dec. 18, Tuesday
	12:30 pm	Code P, room 5092, Bldg. 6;
	2:00 pm	Code N, room 5143, Bldg. 6;
	2:00 pm	Code C, Crystal Gateway 4, Suite 1200;
	3:00 pm	Code L, room 6061, Bldg. 6;

	Dec. 19, Wednesday
	12:00 pm	Code SM, room 137, Bldg. 10B;
	2:00 pm	Codes XD, XM, XN room 6123, Bldg. 6;

	
Here's the broadcast schedule for Public Affairs events on NASA 
Select TV.  All times are Eastern.  **indicates a live program.

		Programming on NASA Select TV will resume on 
Tuesday, Dec. 18.

	

All events and times may change without notice.  This report is 
filed daily, Monday through Friday, at 12:00 pm, EST.  It is a 
service of Internal Communications Branch at NASA 
Headquarters.  Contact:  CREDMOND on NASAmail or at 
202/453-8425.
	

NASA Select TV:  Satcom F2R, Transponder 13, C-Band, 72 
degrees West Longitude, Audio 6.8, Frequency 3960 MHz.
             Headline News

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

End of SPACE Digest V12 #706
*******************