Rosat Press Kit

8/7/2019 Rosat Press Kit

1/18

ROENTGEN SATELLITE(ROSAT)

i NITED KINGDOM.PRESS KIT

MAY 1990

7 7


2/18

PUBLIC AFFAIRS CONTACTS

Debra RahnInternational Relations Division

, NASA Headquarters, Washington, D.C.(Phone: 202/453-8455)

Michael BraukusOffice of Space Science and ApplicationsNASA Headqua rters, Wash ington , D.C.(Phone: 202/453-1547)

Jim CastOffice of Space FlightNASA Headqu arters, Washin gton, D.C.(Phone: 202/453-8536)

Randee ExlerGoddard Space Flight Center, Greenbelt, Md.(Phone: 301/286-7277)

George Diller/Dick YoungKennedy Space Center, Fla.(Phone: 407/867-2468)

Wilfried GeistDLR ROS AT Project OfficeCocoa Beach, Fla.(Phone: 407/784-8071)

7 7


3/18

CONTENTS

GENERAL RELEASE............................................l

SCIENCE OBJECTIVES.........................................2

DIVISION OF TASKS..........................................4

MISSION TIMELINE............................................S

ROSAT FLIGHT AND LAUNCH CONFIGURATION......................6

LAUNCH VEHICLE SCHEMATIC...................................7

MISSION BOOST PROFILE......................................8

TH E INSTRUMENTS............................................g

X-RAY SKY SURVEY...........................................gPOINTED OBSERVATIONS......................................lO

LAUNCHOPERATIONS.........................................lO

LAUNCH VEHICLE............................................ll

NASA ROLE... ............................................. 1 2MISSION MANAGEMENT........................................13


4/18

RELEASE: 90-66

ROSAT SPACECRAFT TO EXPLORE HIGH ENERGY UNIVERSE

Continuing a program in which i t has been a pio neer, NASAwill join with the U.S. Air For ce and West Germany to launch theRoentgen Satellite (ROSAT) to expand human knowledge of the high-energy processes within the universe. ROSAT is scheduled forlaunch aboard a McDonnell Douglas Delta I1 expendable launchvehicle from Cape Canaveral Air Force Station , Fla., no earlierthan May 31 .

ROSAT, a cooperative program between the United States andthe Federal Republic of West Germany, originated from a 1975proposal to the Bundesminister fur Forschung und Technologie(BMFT) from scientists at the Max-Planck-In stitut furExtraterrestrische Physik (MPE) in Garching, FRG. The misionwill examine X-rays emitted by cosmic sources. The mission'sobjective is a detailed survey of X-ray sources across the sky ,followed by studies of some 1,000 of the anticipated 5 0 , 0 0 0 to100,000 sources that will be detected.

X-rays from astronomical bodies cannot be observed fromground level because the Earth's atmosphere blocks them. Onlyinstruments beyond the atmosphere can measure the X-ray sk y,making X-ray astronomy a true product of the space program.

Because X-ray emission is characteristi c of very hi ghtemperatures, X-ray astronomy allows scientists to study high-energy processes in the universe. Such high-temperat ureprocesses represent a small fraction of the energy generated byordinary stars like the su n, but they can dominate the output ofsupernova remnants, quasars and celestial systems containingneutron stars or black holes.

NASA helped pioneer the development of X-ray as tron omy, butthe last NASA X-ray mission was the High Energy AstronomyObservatory (HEAO-2), nicknamed the Einstein Observatory bec ausei t was launched in 1979, the centennial year of physicist AlbertEinstein's birth. A landmark in the development of astronomy,the Einstein Observatory provided the first true images of X-ray-emitting objects.

- end general release -background information follows

7 7 - -r


5/18

- 2 -

ROSAT Science Objectives

The ROSAT all-sky survey, which will take 6 months tocomplete, will use the imaging telescopes to measure posit ions ofX-ray and extreme ultraviolet (XUV) sources to an accuracy of 0 .5arc minutes, while obtaining fluxes and spect ral information.

The second stage of the mission will c onsis t of pointedobservations of selected sources. Sources are chosen for thepointed phase based on proposals submitted by the astr onomi calcommunity for peer review. Outlined below ar e some of the topicsto be explored in the pointed phas e of observations.

Different types of normal star s appa rentl y emit X-rays bydifferent mechanisms. Relatively cool stars like the sun emit X-rays from an outer corona of hot, low-density gas (visible whenthe bright chromosphere is masked, as in an eclipse). X-rays are

thought to be produced in the stellar corona by interactions withthe stellar magnetic field , heating gases to 1 million degrees ormore. Scientists do not fully understand the corona phenomenon,but with ROSAT they can study the coro na effect in the stars.

Hot stars, which are 5 to 10 times hotter than the sun and10 to 100 times more massive, also are X-ray emitters. In thesestars i t is believed that stellar wind s carry shock-heatedparcels of gas that emit X-rays.

Very young stars are born in regions of contracting gas anddust that generally block astro nomer s view of X-rays. As amolecular cloud conde nses, temperatures climb, nuclear reactions

begin and a star bursts into life. The nature of X-ray emissi onfrom such young stars is a mystery that ROSAT will investigate.

Supernova remnants, the remains of exploded massive sta rs,can tell scientists a great deal about the evolution of a star.The source of the explosion, the outward propagation, velocityand dynamics of the ejecta, the atomic composition of the debrisand the evolution of the collapsed core are all que stions ofinterest to astronomers. Supernova 1006, observed in the year1006 AD, was the earliest recorded observation of a supernova inthis galaxy. X-radiation detected in the constellation Lupus isthought to be the remnant of that explosion. RO SA T' s high-resolution observations may show details of the distribu tion of

material in this remnant.Compact objects such as white dw arfs, neutron stars and

black holes evolve from dying stars when gravity has reduced themto the minimum possibl e volume for their mass. The gravitationalfields around black holes a re s o strong that not even light canescape, and the ex istence of black holes is only established bytheir effec ts on objects close to them.

..

- more -


6/18

- 3 -

The high spatial resolution of the ROSAT telescope willallow determination of the first accurate positions for compactX-ray sources. Many stars exist in binary systems, rotatingaround one another, with the compact member of the binaryattracting a f low of X-ray emitting material from itscompanion. Detailed analysi s of the X-ray data will giveinformation about the size and shape of the system.

Normal galaxies, both spiral and elliptica l, produce X-rays. In spirals , the X-rays represent the accumulated emissionfrom individual X-ray sources within the galaxy. ROSAT, with itsimproved sensitivity and spatial resolution, will allow de tectionof these individual sources in many galaxies. X-rays fromelliptical galaxies, however, appear to originate in gas severalmillions of degrees in temperature. This gas is gravitationallyconfined, and a knowledge of its temperature and density will

enable scientiststo

determine the mass of the galaxy.When comparing this mass with the mass of the stars

comprising a galaxy , the difference will be a measure of darkmatter associated with the galaxy. The effects of dark matterwere detected by the Einstein Observatory for a few galaxies.The greater sensitivi ty, spatial and spe ctral resolution of ROSA Twill increase the sample of galaxies studied and place strongerconstraints on the determination of mass and distribution of darkmatter in elliptical galaxies.

Active Galactic Nuclei (AGN) make up a small percent of al lgalaxies. Very large amounts of energy are released from their

nuclei, much more than ca n be accounted for by the stars theycontain. The most well known class of AGN ar e quasars, which canbe observed at very large distances because they are among themost luminous objects in the Universe. The la rge emissions fromAGNs suggest they are powered by the release of gravitationalpotential energy as matter accretes onto a massive centralobject, thought to be a black hole.

Current ideas favor the formation of a disc of accretingmatter, heated by viscous forces as material is pulled inwardonto the black hole. Soft X-rays may origina te in thehypothesized accretio n disk. ROSA T's soft-X-ray timing andspectral data may prov ide valuable information on the size and

physical conditions in this disk. Although extended optical andradio emitting regions have been found in many AGN, only a fewcases of extended X-ray emission are known.resolution and sensitivity will allow a detailed study of suchphenomena, giving scienti sts clues to their physical origin.

ROSAT's high spatial

- more -


7/18

- 4 -

The first X-ray astronomy experiments discovered thatclusters of galaxies emit extensive X-rays. These emissionsoriginate in the multi-million degree gas permeating eachcluster, and the mass of this gas exceeds the mass of visiblematerial. The total mass of a cluster can be measured in thesame way as for elliptical galaxies. ROSAT will make i t possibleto estimate mass for lower temp erature clusters emitting in thesoft X-ray regime.

The X-ray background com prises a uniform emission on whichindividual X-ray sources are superimposed. This backgroundradiation may be either an intergalactic gas smoothly distributedthroughout the Universe or a large number of individual sourcestoo numerous and weak to be resolved by current instrum ents. Th esimplest way to resolve this question is to observe thebackground with increasingly sensitive and high spatial-resolution detectors to try to identify any individual sourcesresolved.

Division Of Tasks

Germany

Spacecraft Dornier System (Prime Contractor)Messerschmitt-Boikow-BlohmTelefunken

X-Ray Mirror Assembly Carl Zeiss

Focal Plane Assembly MPE Garching

Two Position SensitiveProportional Counters MPE Garching

Spacecraft Operations DLR-GSOC Oberpfaffenhofe n

USA

Delta I 1 Launch Vehicle McDonnell Douglas/USAF/NASA

High Resolution Imager SAO/GSFC

UK

Wide Field Camera University Of Leicester and aConsortium of UK institutes

- more -


8/18

- 5 -

ROSAT MISSION TIMELIME

Activity

Six solid rocketmotors burnout

Time Altitude Downrange Velocity(Min: ec) Distance ( W H )

0:56 39,254 ft . 16,422 ft 1,220

Three solid rocketmotors ignite 1:Ol 46,543 ft . 21,275 ft. 1,175

Jettison 3 solidmotor cas gs

Jettison 3 solidmotor casings

1:02 9.07 sm 4.21 sm 1,185

1:03 9.34 sm 4.41 sm 1198

Three solid motorsb u r n out 1:56 28.7 sm 29.23 sm 3396

Jettison 3 solidmotor cas ng 2:02 31.4 sm 34.14 sm 3517

Main engi ne cutoff (MECO) 4 : 2 5 86.9 sm 281.33 sm 11,663

1st separation 4:33 91.3 sm 306.29 sm 11,6 65

2nd stag e ignition 4:38 94.3 sm 323.43 sm 11, 646

Fairing jettison 4:43 96.8 sm 338.89 sm 11,671

2nd stage enginecutoff (SECO 1) 11:lO 185.4 sm 1,753.7 sm 16,711

2nd stag e ignition 38:02 360.7 sm 15,977

2nd stage enginecutoff (SECO 2) 38: 14 360.8 sm 16,227

Spac ecraf t sepa ratio n 43:OO 359.8 sm 16,231

- more -

- 7 7 - ' T


9/18


10/18

- 7 -

VA n g

FirstSta

Launch Vehicle Schematic

-more-

- --r


11/18

R O S AT SPACECRAFT MISSIONDELTA I1 BOOST PROFILE

SeCo1l(l S t a g eE n g i n e C u t o f f

Alt = 161 .2 i i i

AMECO (2634.5 sec ) Y($P 1

-c .6 6 9 . 7 S C C )

Al t = 7 5 . 6 nml

Fairing Drop (203.0 s e c )V C l i

= 2 5 , 5 2 7Alt = 04.3 nmiVel! = 1 0 , 2 0 3 f p s7.

el i = 1 0 , 1 0 6 fp s

S e c o n d S t a g eIgni t ion (270.0 s e c )Al t = 82.0 nmi- Vel1 = 18,165 fp s

\\

\\

\/-:Sol id D r o p (3)Ait = 27.3 nrni3 (122.0 s e c )'p Vel i = 6,629 fps\

\

\\

\

\ \Solid Drop ( 6 ) \

Ve l i = 2,700 fp s \

\\62.5 s e c )

Alt = 7. 9 nrni \

\

'i Solicl Impact (Socontt SnI)

---___

Impact (First Sol)

Drag Corrocled Surlnco Rango 164 nml *


12/18

- 9 -

The Instruments

The heart of the ROSAT spacecraft is the grazing-incidenceX-ray telescope (XRT) developed in West Germany. The XRTfocuses low energy or RsoftS X-rays in the energy range of 0.1 to2 kilo electron volts (keV), corresponding to wavelengths of 100to 6 Angstroms, onto detectors in XRTUs fo cal plane.

This telesco pe consists of a four-f old nested Wolter type Imirror system with an 33-inch diameter and a 94-inch focallength, optimal with respect to survey sensitivity and on-axiscollecting area at 1 keV. A carousel in the focal plane assemblycarries two virtually identical West Germa n Posit ion SensitivePropor tiona l Counte rs (PS PC) and a single U.S.-supplied Hig hResolution Imager (HRI).

As a result of a separate agreement between West Germany andthe United Kingdom, ROSAT also will carry a longer wavelengthtelescope supplied by the U.K. called the Wide Field Camera(WFC). The WFC extends the measuring rang e to the extremeultraviolet ( X W ) region, with response over the energy range0 . 0 4 to 0 . 2 keV (300 to 60 Angstroms). Th e WFC will view the skysimultaneously with the XRT, so that it can measure any XUV fluxthat might accompany X-ray emissions, in addition to discoveringnew sources that radiate primarily in the XUV during the survey.

X-ray Sky Survey

A 2-month instrument calibration period will follow ROSAT' s

launch. After calibration, the spacecraft will completely surveythe celestial sphere. The sky survey is performed bycontinuously scanning great circles 2 degrees wide andperpendicular to the Earth-sun line, which allows full-skycoverage in 6 months. The scan rate of one rotation per orbitwill avoid wasted time due to Earth occultation. ROSAT's X-raysurvey will be the first by a true imaging telescope, andscientists anticipate that there will be almo st a 100-foldincrease over the number of sources detected previously i nsurveys conducted with mechanically collimated counters.

The X-ray sk y survey will be performed with the PSPC at thefocus of the XRT. Its relatively large field of view ( 2 degree s

circular com pared to th e 1 degree per day change in the directionof the Earth-sun line) and high sensitivity are ideally suited tothis aspect of the mission. The X-ray survey data will beanalysed and publishe d by the Max-Planck Insti tut furExtraterrestrische Physik.

- more -

'7 7 - -r


13/18

- 10 -

The concurrent X W urv ey, performed by the WFC with its 5-degree f iel d, will be the very first conducted in its portio n ofthe electromagnetic spectrum and will be capabl e of detectingsources at a level 1,000 times weaker than the brightest knownX W source, the white dwarf star HZ43. The results of the X Wsurvey will be analysed and publishe d by the WFC con sortium.

Pointed Observations

After the survey, the mission will be devoted to pointedobservations. The nominal mission lifetime contain s 1 year ofpointed observations, but the spacecraft orbit has been chosen toguarantee at least 1 additi onal year of observations. The PSPCcounter gas is the only consum able in the payloa d, and the gasshould not be exhausted f o r at least 2 years of pointedoperation.

the time allotted for pointed observ ations with the XRT, with theremaining time being shared by the West Ger mans (3 8 per cen t) andthe British ( 1 2 percent). Gues t invest igator s can cho ose thepointing directions, instrument. parameters and durati ons of theobservations. After 1 year of proprietary ownershi p, allpointed-mode X-ray data enter the public domain and are availablef o r archiv al research.

U.S. guest investigators have been allocated 50 percent of

ROSAT Launch Operations

The 6555th Aerospace Test Group, U.S. Air Force Eastern.

Space and Missile Center , is responsible for the preparation andlaunch of the De lt a. 11 which will carry the 5333 lb. ( 2 4 2 4 kg)ROSAT i nto a circular orbit of 359 statu te miles (58 0 km) with aninclination of 53 degrees.

ROSA T spacecraft pre-launch processing was accomplished bythe West German Institute for Air and Spa ce Flight cooperatingwith the Kennedy Space Center 's Payloads OperationsDirectorate. Processing included functional testin g,installation of the wide field camera and interface tests withthe German mission control center at Oberpf affenh ofen, nearMunich.

Launch operations will be conducted from the Complex 17block house by a USAF/McDonnell Dou gla s team under the direc tio nof the 6555th Aerospace Test Group. The hypergolic propellantsfor the second stage will be loaded approximately three daysprior to launch. The RP-1 (keros ene) fuel for the first stageand the supercold liquid oxygen oxidizer for the first s tage willbe loaded during the terminal countdown.

- more -


14/18

- 11 -

NASA will oversee the launch vehicle and support ROSATflight preparations. A Kennedy Space Center launch manager willrepresent NASA during vehicle preparations and countdown and

serve as liaison with the Air Force. The launch manager will belocated in the Mission Direc tor's Center on CCAFS to monitorlaunch countdown operations and will provide the final NASAconcurrence for launch to the USAF launch director.

DELTA I1 Launch Vehicle

A United States Air Force Delta I1 6920-10 expendable launchvehicle, featuring the largest payload fairing flown on a Deltato date, will lift ROSAT into low-Earth orbit. Based on theTitan fairing McDonnell Douglas Sp ace System Company (MDSS C) hasbuilt for years, the 10-foot-diameter fairing will be the firstthree-section fairing used on a Delta vehicle. Fairingspreviously used on Deltas have consisted of two sections. Thisconfiguration accommodates ROSAT and other payloads requiring alarger volume than offered by the 9.5-foot and 8-foot fairi ngsflown previously. NASA funded the development of the 10-footfairing for the Delta rocket.

The fairing uses the MDSSC contamination-free thrusterjoints to separate into three sections. MDSSC fairings , whichare manufactured at the MDSSC plant in Pueblo, Colo., have a 100percent success record.

The ROSAT launch will be the 10th flight for the Delta 11.Delta's origins reach back to the mid-l950s, when the U. S. AirForce developed the Thor intermediate-range ballistic missile.NASA later modified the Thor, a single-stage, liquid-fueledmissile, for the Delta launch vehicle. The two-stage Delta I1carrying ROSAT cons ists of four major assemblies: the firststage, including nine strap-on solid rocket motors, theinterstage, the second stage and the payload fairing. Initi alsystem improvements incorporated into the Delta I1 include a 12-foot extension i n the first-stage tanks for added propellantcapacity and the use of Morton-Thiokol Caster IVA solid rocketboosters.

The Delta I1 is 123.4 feet tall and 8 feet in diameter. Thepayload fairing is 26 feet tall and 10 feet in diameter. Thefirst-stage main engine has a liftoff thrust of 207,000 pounds,and each of the nine solid stra p-on motors has a sea-level thrustof 9 7 , 0 7 0 pounds. The main engine and six of the nine solidmotors are burning at liftoff, providing a total liftoff thrustof 789,420 pounds. The second set of three solid strap-on motorsis ignited during the first stage burn. The second-stage enginehas a vacuum-rated thrust level of 9,645 pounds.

- more -

7 7 - -r


15/18

- 1 2 -

Several major subcontractors contribute to the Delta vehic lebuilt by MDSSC: The Rocke tdyne Divis ion of RockwellInternational in Canoga Park, Calif., is responsible f o r thefirst-stage main engine; Aerojet Techsystems Co. in Sacramento,

Calif., builds the second-stage engine; Morton Thiokol ofHuntsville, Ala., manufactures the solid rocket boosters; andDelta Systems of Goleta, Calif., produces the guidance computer.

NASA's Role

The Goddard Space Flight Center (GSFC ), Green belt, Md., isthe lead NASA center for the U.S. porti on of ROSAT. GSFC manage dthe development and delivery of the High Reso lutio n X-ray Imagerfabricated at the Smithsonian Astrophysical Observatory,Cambr idge, Mass., and assured the instr ument' s integration intothe XRT focal plane. GSFC also managed al l aspects of l a u n c hvehicle preparation and its mating to the spacecraft.

NASA will provide ini tial spacecraft tracking and orbitdetermination until these tasks can be assum ed by West Germ any atits ground stat ion at Weilheim and Operati ons Control Center atOberpfaffenhofen a few hours after launch. NASA also is preparedto provide, on request, spacecraft engineering data capture andtransmission to Germany in case of an emergency during the lifeof the spacecraft.

GSFC is developing a comp rehen sive U.S. ROSAT Science DataCenter (USRS DC), and is responsible for providing a ll U.S. guestinvestigators with their data and the software necessary foranalysis. Data centers will be establ ished at both the GSFC an d

at the Smithso nian Astrophysical Observat ory for the convenien ceof guest investigators, but investigators also will be able t operform most of their analyse s at their h ome institutions. GSFCalso is establishing an accessible ROSAT da ta archive that ca n beused in conju nction with data se ts from other missions.

The USRSDC supports astronom ers in their preparation ofproposals for pointed phase observat ions through the MissionInformation and Planning System (MIPS). MIPS i s . a softwaresystem that provid es a proposer with i nform ation such asobservation times appro priat e for a given sour ce. It was used by137 different astronomers across the U.S. for the first round ofproposals. Follo wing the results of a questionnaire distributedto users, the USRSDC staff is making improvements in preparationfor the second round of proposals.

In the first round, 354 proposals were received by NASA. TheUSRSDC assisted NASA Headquarters in the review and selection ofthese investigations by perf orming t echni cal evaluations andorganizing the independent peer review. USRSD C staff were onhand during the peer review to answer technical questions.

- more -


16/18

- 1 3 -

GSFC is responsible for processing and distributing ROSATpointed-phase data.German Space Operation Center ( G S O C ) in Oberpfaffenhofen, West

Germany.

Initially all data are processed at the

Video tapes containi ng master data records are then shippedto the Max Plank In stitute in Garching, West G ermany, and toGSFC , where they are processed to create the file s fordistribution to guest investigators. These files also arearchived by the USRSDC and will be made gene rally available 1year after calibrated data has been delivered to theinvestigator.

ROSAT/DELTA TEAM

Bundesmin isterium fuer Forschun g und Technologie

Dr. Jan B. Mennicken , Director, General Aerospace Research andTechnology, Geosciences, Transportation

Dr. Ing. H. Strub, Director, General Aerospace Research andTechnology , Transporat ion and Marine Technol ogy

Dr. Herbert Roemer, H ead, Section Space Research and Astronomy

Manfred Otterbein, Program Director/Manager/Scientist

Deutsche Forschungsgsgesellschaft fur Luft-und Raumfahr t,

OberpfaffenhofenWilfried Geist, Project Manager

Dr. Volker Kalte nbach, Deputy Project Manager

Friedrich Guckenbiehl, ROSAT Manager Ground O perations

Max-Planck-Institut fur Extrater restrische Physik, 8 0 4 6 Garching,West Germany

Prof. J. Truemper, ROSAT Project Scientist

Dr. ,B . Aschenbac h, Deputy ROSAT Project Scientist

Dr. H. Brauninger, ROSAT F1 Project Manager

H. Hippmann, ROSAT F1 Project Engineer

Dr. H. U. Zimmerman n, German ROS AT Data Center Coordinator- more -

1 1 - '7


17/18

- 1 4 -

NASA Headquarters

Dr. Lennard A. Fis k, Associate Adminis trator, Offi ce of Space

Science and ApplicationsAlphonso V. Diaz, Deputy Associate Administrator, Office of SpaceScience and Applications

Dr. Charles J. Pellerin Jr., Director, Astrophysics Divi sion

John A. Linto tt, Program Manager

Dr. Alan N. Bunner, Program Scientist

Dr. Louis Kaluzienski, Deputy Program Scientist

Dr. William B. Lenoir, Associate Administrator, Office of SpaceFlight

Joseph B. Mahon, Deputy Associate Administrator, Office of SpaceFlight

Charles R. Gunn, Direc tor, Unmanned Launch Vehicles and UpperStages

Peter T. Eaton, Chief , Small and Medium Launch Vehicles Branch

Charles T. Force, Associate Administrator, Office of SpaceOperations

Goddard Space Flight Center

Dr. John W. Townsend Jr., Director

Gilbert W. Ousley, Sr. Project Manager

Dr. Stephen S. Holt, Project Scientist

Dr. Robert Petre, Deputy Project Scientist

Dr. Robert Price , Director, ROSAT Science Data Center

John Beckham, Delta Projec t Manager

- more -


18/18

- 1 5 -

Kennedy Space Center, Fla.

Forrest S. McCartney, Center Director

John T. Conway, Director of Payload Management and O perations

J. L. Womack, Director, Expendable Vehicles, NASA Launch Manager

William R. Fletcher, ROSAT Launch Site Support Manager

USAF Eastern Space and Missile Center, Patrick AFB, Fla.

Col. John R. Wormington, Commander

Col. Robert B. Bourne, Commander, 6 555th Aerospace Test Group

Lt. Col. Harold Donald, Acting Chi ef, Medium Launch VehicleDivision Test Director

Harvard-Smithsonian Astrophysical Observatory

John Ger des, Project Manager

Dr. Stephen R. Mu rray, HRI Project Scientist

McDonnell Douglas Space Systems Co., Hunti ngton Beach , .Calif.

Don Tutwiler, Director, NASA and Commercial Programs

Lyle Holloway, Director, Launch Sites

Jerry Winchell, Program Manager, NASA Programs

Jay Witzling, Senior Manager, Spacecraft Integra tion

Jack Dodds, Launch Conductor

- end -

Rosat Press Kit

Documents

Transcript of Rosat Press Kit