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structures than those utilized heretofore.

These structures will be

too large to launch in prefabricated form, as was done with Skylab;

they will need to be either assembled, deployed from prefabricated

substructures, or actually manufactured in space, perhaps by servo

mechanisms

in the early application stages, but eventually by people.

And whereas there has been an impressive start made on the earliest conceptual formulation of such structural systems via a relatively miniscule NASA funding program, it now appear that the natural expansion of such promising early efforts is not to be implemented.

The applications for such large structures are not limited to

the far future.

Our next generation of communications satellites are

expected to perform a number of new functions in public service activi

ties, in direct broadcasting, in navigation, in military reconnaissance and communications, and in many tight-beam communications applications,

as we have described in a recent AIAA publication, "Space

A

Resource for Earth."

These activities require not only more on-board

power, as I said earlier, but also much larger antennas

some per

haps hundreds of meters in diameter.

Burton Edelson, in a recent

article in the AIAA magazine Astronautics & Aeronautics, suggested

an exciting concept to serve a multitude of these communications

functions: the orbital antenna "farm".

But we do not yet know whether our ideas on how to build, launch,

control, maintain, and move these large antenna structures are feasible,

practical, or cost-effective.

And the use of space-bi

4

communica

tions systems is not a wild-eyed dream of the future

it is an area

of space activities that has been shown historically to be productive,

profitable, and beneficial to people in every walk of life and in

virtually every nation on Earth.

It would appear that a modest but

growing NASA technology effort in this area would be well worthwhile.

The need for an active program on large space structures becomes even more significant for other areas of space industrialization, such

as those described by many of the witnesses at these hearings. Perhaps

the most interesting of these longer-term prospects, the one having

the most significant potential impact on the Earth's peoples, is the

space-based solar powerplant.

The magnitude of this concept tends to

induce a severe case of "future shock" in many of the new Administration's

officials, but even if actual deployment of such stations is still de

cades away, the preparatory research and technology problems associated with so large and so potentially important an effort should have already grown to a much larger portion of our federal energy budget

than that which appears in the recently-approved Department of Energy

"decision-making" study of the subject.

But even if the power satellite concept should not prove out,

there is a serious need for substantial activity

beyond Spacelab

to develop the in-space fabrication capabilities upon which so much

of the projected future space effort depends. Thus, independently of the conclusions of the DOE space power satellite studies, NASA

should substantially expand its efforts in this area of activity.

Before closing, I want to be sure to make clear one basic pre

mise which is threaded throughout all the points I have attempted to

make in this paper: the importance of a routine, reliable, reusable transportation system to get from the Earth's surface into orbit, namely the shuttle. Without such a system, there can be little or

24-215 0 - 78 - 40

no growth in our space activities, and therefore certainly not much

in the way of "Future Space Programs".

Please also note that although I have touched on only four con

cerns which AIAA members have expressed, there are many other areas

of NASA activity, particularly in advancing technological capability, in which too shortsighted a view can seriously prejudice the attainment of useful and viable space objectives.

- 9

BIOGRAPHY BRIEF FOR DR. JERRY GREY

Dr. Jerry Grey received his Bachelor's degree in Mechanical Engineering and his Master's in Engineering Physics from Cornell University; his PhD in Aeronau and Mathematics from the California Institute of Tennology.

CS

His early career included stints as a full-time Instructor of Thermodynamics at Cornell, an engine cevelopment engineer at Fairchild, a Senior Engineer at Marquardt, and a hypersonic aerodynamicist at the GALCIT 5-inch Hypersonic Wind Tunnel. He was a professor in Princeton University's Department of Aerospace and Mechanical Sciences for 15 years, where he taught courses in fluid mechanics, propulsion, and nuclear power plants and served as Director of the Nuclear Propulsion Research Laboratory. He formed the Greyrad Corporation in 1959 and was its full-time President from 1967 to 1971. He is now Administrator of Public Policy for the American Institute of Aeronautics and Astronautics, where he spends half his time; the other half is devoted to consulting practice, writing, and lecturing. He is also Adjunct Professor of Environmental Science at Long Island University, where he teaches courses on energy, and President of the Calprobe Corporation, a supplier of high-temperature instrumentation based on Dr. Grey's patents.

Dr. Grey is the author of five books and over a hundred technical papers in the fields of solar energy, fluid dynamics, heat transfer, I -ket and aircraft propulsion and power, plasma diagnostics, instrumentation, and the applications of technology. He has served as consultant to the U. S. Congress (as Chairman of the Office of Technology Assessment's Solar Advisory Panel), the Air Force, NASA, and ERDA, as well as over twenty industrial organizations and laboratories. He was Vice PresidentPublications of the AIAA for five years, and is listed in Who's Who in America, American Men of Science, who's Who in Aviation, Engineers ci Distinction, Cor.temporary Authors, and the United Kingdom's Blue Book and Dictionary of International Biography.

UNITED STATES DEPARTMENT OF AGRICULTURE

FOREIGN AGRICULTURAL SERVICE

WASHINGTON, D.C. 20250

FAS

JAN 31 1978

Mr. Olin E. Teague, Chairman
Committee on Science and Technology
House of Representatives
Washington, D.C. 20515

Dear Mr. Teague:

This is in further response to your December 19, 1977, letter in which you asked for our views on future space programs.

The enclosed statement, is submitted for the consideration of
you and your Committee.

We appreciate the opportunity to present our thoughts on future space programs as they relate to the Foreign Agricultural Service. Mr. Howard W. Hjort, Director of Economics, policy Analysis and Budget, has overall responsibility for Remote Sensing Policy coordination for the Department of Agriculture. If the Committee wishes additional information concerning the total Department of Agriculture remote sensing activities, plans or policy, Mr. Hjort should be contacted in the future.

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