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PERFORMANCE

3406 Includes satellites; space platforms; space stations; spacecraft systems and components such as thermal and environmental controls; and attitude controls.

For life support systems see 54 Man/System Technology and Life Support. For related information see also 05 Aircraft Design, Testing and Performance, 39 Structural Mechanics, and 16 Space Transportation.

Includes engineering (general); communications and radar; electronics and electrical engineering; fluid mechanics and heat transfer; instrumentation and photography; lasers and masers; mechanical engineering; quality assurance and reliability; and structural mechanics.

For related information see also Physics.

31 ENGINEERING (GENERAL)

3427 Includes vacuum technology; control engineering; display engineering; cryogenics; and fire prevention.

19 SPACECRAFT INSTRUMENTATION

N.A. For related information see also 06 Aircraft Instrumentation and 35 Instrumentation and Photography.

20 SPACECRAFT PROPULSION AND POWER

3410 Includes main propulsion systems and components, e.g. rocket engines; and spacecraft auxiliary power sources.

For related information see also 07 Aircraft Propulsion and Power, 28 Propellants and Fuels, 44 Energy Production and Conversion, and 15 Launch Vehicles and Space Vehicles.

32 COMMUNICATIONS AND RADAR

3429 Includes radar; land and global communications; communications theory; and optical communications.

For related information see also 04 Aircraft Communications and Navigation and 17 Space Communications, Spacecraft Communications, Command and Tracking. For search and rescue see 03 Air Transportation and Safety, and 16 Space Transportation.

CHEMISTRY AND MATERIALS

Includes chemistry and materials (general); composite materials; inorganic and physical chemistry; metallic materials; nonmetallic materials; propellants and fuels; and materials processing.

33 ELECTRONICS AND ELECTRICAL ENGINEERING

3441 Includes test equipment and maintainability; components, e.g., tunnel diodes and transistors; microminiaturization; and integrated circuitry.

For related information see also 60 Computer Operations and Hardware and 76 Solid-State Physics.

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Includes sound generation, transmission, and attenuation.

For noise pollution see 45 Environment Pollution.

AND SPACE POLICY

N.A. Includes NASA appropriation hearings; aviation law; space law and policy; international law; international cooperation; and patent policy.

72 ATOMIC AND MOLECULAR PHYSICS 3500

Includes atomic structure, electron properties, and molecular spectra.

73 NUCLEAR AND HIGH-ENERGY PHYSICS

3502 Includes elementary and nuclear particles; and reactor theory.

For space radiation see 93 Space Radiation.

85 URBAN TECHNOLOGY AND
TRANSPORTATION

3519 Includes applications of space technology to urban problems; technology transfer; technology assessment; and surface and mass transportation.

For related information see 03 Air Transportation and Safety, 16 Space Transportation, and 44 Energy Production and Conversion.

74 OPTICS

3504

SPACE SCIENCES
Includes light phenomena and optical devices.
For lasers see 36 Lasers and Masers.

Includes space sciences (general); astronomy; as

trophysics; lunar and planetary exploration; solar physics; 75 PLASMA PHYSICS

3506

and space radiation. Includes magnetohydrodynamics and plasma fusion.

For related information see also Geosciences. For ionospheric plasmas see 46 Geophysics. For

88 SPACE SCIENCES (GENERAL)

N.A. space plasmas see 90 Astrophysics. 76 SOLID-STATE PHYSICS

89 ASTRONOMY

3520 3509 Includes superconductivity.

Includes radio, gamma-ray, and infrared astronomy;

and astrometry. For related information see also 33 Electronics and Electrical Engineering and 36 Lasers and Masers.

90 ASTROPHYSICS

3521 77 THERMODYNAMICS AND

Includes cosmology; celestial mechanics; space plasSTATISTICAL PHYSICS

3516

mas; and interstellar and interplanetary gases and dust.

For related information see also 75 Plasma Physics. Includes quantum mechanics; theoretical physics; and Bose and Fermi statistics.

91 LUNAR AND PLANETARY For related information see also 25 Inorganic and Phys

EXPLORATION

N.A. ical Chemistry and 34 Fluid Mechanics and Heat Transfer.

Includes planetology; and manned and unmanned

flights. SOCIAL SCIENCES

For spacecraft design or space stations see 18 SpaceIncludes social sciences (general); administration and

craft Design, Testing and Performance. management; documentation and information science; economics and cost analysis; law, political science, and

92 SOLAR PHYSICS

3523 space policy; and urban technology and transportation.

Includes solar activity, solar flares, solar radiation and

sunspots. 80 SOCIAL SCIENCES (GENERAL)

N.A.

For related information see 93 Space Radiation. Includes educational matters.

93 SPACE RADIATION

3524 81 ADMINISTRATION AND

Includes cosmic radiation; and inner and outer earth's MANAGEMENT

3517

radiation belts. Includes management planning and research.

For biological effects of radiation see 52 Aerospace

Medicine. For theory see 73 Nuclear and High-Energy 82 DOCUMENTATION AND

Physics. INFORMATION SCIENCE

3517 Includes information management; information stor

GENERAL age and retrieval technology; technical writing; graphic arts; and micrography.

Includes aeronautical, astronautical, and space sciFor computer documentation see 61 Computer Pro

ence related histories, biographies, and pertinent reports gramming and Software.

too broad for categorization; histories or broad overviews

of NASA programs. 83 ECONOMICS AND COST ANALYSIS

N.A. Includes cost effectiveness studies.

99 GENERAL

N.A.
Note: N.A. means that no abstracts were assigned to this category for this issue.
SUBJECT INDEX
PERSONAL AUTHOR INDEX

1-51
CORPORATE SOURCE INDEX

1-59 CONTRACT NUMBER INDEX

|-71 REPORT/ACCESSION NUMBER INDEX

1-73

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NTRACT OR GRANT
REPORT NUMBERS

PRICE CODE

AVAILABILITY SOURCE
COSATI CODE

(Contract NAS9-17560)
(NASA-CR-172095; R-2088; NAS 1.26:172095) Avail: NTIS HC
A10/MF A01 CSCL 22B

The second Control Of Flexible Structures Flight Experiment
(COFS-2) includes a long mast as in the first flight experiment,
but with the Langley 15-m hoop column antenna attached via a
gimbal system to the top of the mast. The mast is to be mounted
in the Space Shuttle cargo bay. The servo-driven gimbal system
could be used to point the antenna relative to the mast. The
dynamic interaction of the Shuttle Orbiter/COFS-2 system with
the Orbiter on-orbit Flight Control System (FCS) and the gimbal
pointing control system has been studied using analysis and
simulation. The Orbiter pointing requirements have been assessed
for their impact on allowable free drift time for COFS experiments.
Three fixed antenna configurations were investigated. Also
simulated was Orbiter attitude control behavior with active vernier
jets during antenna slewing. The effect of experiment mast dampers
was included. Control system stability and performance and loads
on various portions of the COFS-2 structure were investigated.
The study indicates possible undesirable interaction between the
Orbiter FCS and the flexible, articulated COFS-2 mast/antenna
system, even when restricted to vernier reaction jets. Author

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