Space

A Military Space Control Doctrine -- A Necessity In The Post-Cold War World

A Military Space Control Doctrine -- A Necessity In The Post-Cold War World

 

CSC 1992

 

SUBJECT AREA C4

 

 

 

                        EXECUTIVE SUMMARY

 

Title:  A Military Space Control Doctrine -- A Necessity in

                  the Post-Cold War World

 

Author: LCDR Jack A. Greenspan, United States Navy

 

Thesis: With space systems playing an increasing role in

the U.S. national security posture and with the

proliferation of space technology in the post-Cold War

world, the U.S. needs to adopt military space doctrine based

on space control.

 

Background:  The U.S. military has been operating in space

for the last 30 years, yet, surprisingly, no official

military doctrine for space exists.  Space doctrine is in

its infancy as air power doctrine was during the I92Os and

193Os. Despite the lack of an official doctrine, the U.S.

has developed a complex military space capability that

proved successful in Desert Storm.  Furthermore, the U.S.

military has become increasingly reliant on space systems to

support warfighting.  The systems and force structure were

developed during the Cold War when the Soviet Union was the

major threat to U.S. national security.  Today, the U.S. is

redefining its policies and strategies for the post-Cold War

world to deal with emerging powers and new global

relationships.  The proliferation of technology is allowing

many nations, both allies and potential adversaries, to

build space programs with military capabilities.  The Base

Force concept in the new National Security Strategy will

make U.S. forces more reliant on space for warfighting and

response to regional contingencies. Sound doctrine leads to

strategies and plans that would allow the U.S. to acquire

and employ space forces most effectively in support of

national objectives in the post-Cold War world.

 

Recommendation: The U.S. needs to adopt a military space

control doctrine that assures free access to space and the

capability to protect U.S. space resources.

 

             A MILITARY SPACE CONTROL DOCTRINE ---

         A NECESSITY IN THE POST-COLD WAR WORLD

 

                                    OUTLINE

 

Thesis: With space systems playing an increasing role in

U.S. national security posture and with the proliferation of

space technology in the post-Cold War world, the U.S. needs

to adopt military space doctrine based on space control.

 

I.   Space forces provide substantial capability

     A. Reliance on space systems for support

     B. Desert Storm examples

 

II.  No real military space doctrine today

     A.  Current official doctrine

     B.  What  doctrine is

     C.  The evolution of unofficial space doctrine - four

           schools of thought

           1.  Sanctuary

           2.  Survivability

           3.  "High Ground"

           4.  Space Control

     D.  The Soviet threat and impact on doctrine

     E.  The ASAT debate

     F.  Space control -- the emerging doctrine

 

II. Emerging Space Powers and New Threats

     A. Proliferation of space technology

     B. Civil-Military applications of space -- new threat

 

IV.  Implications of new National Security Strategy on space

 

V.   Imperatives for a space control doctrine

              

             A MILITARY SPACE CONTROL DOCTRINE ---

         A NECESSITY IN THE POST-COLD WAR WORLD

 

     The U.S. military has become increasingly reliant on

 

space systems to support warfighting.  Seventy percent of

 

the U.S. military space effort is tactical in nature and the

 

vast majority of support is provided to conventional forces.

 

(1:24)  Until the last 10 years, space systems merely

 

augmented terrestrial systems.  Now the situation has

 

changed.  Many terrestrial systems augment or serve as

 

backups for space systems, such as in communications,

 

weather, navigation and reconnaissance. (6:25-26)

 

     During the 1980s, space systems played an important

 

role in all U.S. conventional military operations.  They

 

were employed in operations Urgent Fury, (Grenada), El

 

Dorado Canyon (Libya) and Just Cause (Panama) for

 

communications, weather prediction, strike route planning

 

and battle damage assessment.

 

     Operation Desert Storm, however, proved a watershed

 

event in military space application.  Air Force Chief of

 

Staff Gen. Merril A. McPeak described it as "the first space

 

war." (3:18)  "While we did not war in space," writes

 

Commander-in-chief, U.S. Space Command, Gen. Donald J.

 

Kutyna, "Desert Storm was the first campaign-level combat

 

operation in which space was solidly integrated in the

 

combat operations and was vital to the degree of success

 

achieved in the conflict." (1:25)

 

     During the five-month buildup in Operation Desert

 

Shield, a mix of user sets, mobile terminals and portable

 

receivers were deployed to Saudi Arabia to create a space

 

infrastructure for receiving and disseminating space-based

 

data. (3:18)  Once hostilities began, space systems were a

 

key component of combat operations.

 

     Many critical support missions, including missile

 

warning, communications, navigation, mapping and weather

 

observation were performed primarily from space. (10:85)

 

     -- Defense Satellite Program (DSP) strategic-warning

 

     satellites provided early warning of Iraqi ballistic

 

     missile attack to both Coalition forces and the

 

     Israelis. (10:85)

 

     -- Various defense communications satellite systems

 

     carried more than 85 percent of all inter-theater and

 

     intra-theater communications. (3:19)

 

     -- The Global Positioning System (GPS) provided precise

 

     navigation to air, sea and land forces.  More than 4500

 

     GPS terminals allowed aircraft to conduct all-weather

 

     missions with extraordinary accuracy; tanks to maneuver

 

     precisely in the featureless desert; minesweeping forces

 

     to navigate safely and effectively in enemy minefields;

 

     and even ration trucks to find and feed soldiers in the

 

     desert. (10:86)

 

     -- LANDSAT, the Department of Commerce's  multispectral

 

     imaging satellite system, provided wide-area imagery to

 

     update maps, to aid in trafficability and terrain

 

     analysis, and to prepare air-route and weapons-delivery

 

     plans. (3:20)

 

     -- The Defense Meteorological Satellite Program (DMSP)

 

     provided images of cloud cover and other weather

 

     conditions to aid in planning combat operations.

 

     Accurate weather forecasting was critical in deciding

 

     whether to employ precision-guided munitions for an air

 

     sortie since target visibility is essential for laser

 

     designation.  In addition, DMSP imagery allowed analysts

 

     to determine moisture content of the soil, and thus,

 

     identify routes which would support the weight of the

 

     armored forces that conducted Gen. Norman Schwarzkopf's

 

     "left hook" into Iraq. (3:19)

 

     The U.S. military has been operating in space for the

 

last 30 years, yet surprisingly no official military

 

doctrine for space exists.  Despite the lack of an official

 

doctrine, the U.S. has developed a complex military space

 

capability that proved successful in Desert Storm.  The

 

systems and force structure were developed during the Cold

 

War when the Soviet Union was the major threat to U.S.

 

national security.

 

     Today, the U.S. is redefining its policies and

 

strategies for the post-Cold War world to deal with emerging

 

powers and new global relationships.  The proliferation of

 

technology is allowing many nations, both allies and

 

potential adversaries, to build space programs with military

 

capabilities.  Additionally, the U.S. military is reducing

 

force structure and overseas presence under the Base Force

 

concept, making it even more reliant on space systems.

 

     Sound doctrine can lead to strategies and plans that

 

would allow the U.S. to acquire and employ space forces most

 

effectively in support of national objectives in the post-

 

Cold War world.  A doctrine that assures free access to

 

space and the capability to protect U.S. space resources is

 

required.  With space systems playing an increasing role in

 

the U.S. national security posture and with the growing

 

number of space powers, the U.S. needs to adopt a military

 

space doctrine based on space control.

 

 “Just as air doctrine was in its formative years in the

 interwar period, space war-fighting doctrine is in its

 infancy today." (5:16)

 

     Space was first acknowledged in military doctrine in

 

1959.  Since then, there has been much debate as U.S.

 

military space doctrine has evolved both officially and

 

unofficially.  Numerous articles have appeared in military

 

professional journals by both staff officers and commanders

 

of  U.S. space forces arguing the merits of different

 

doctrinal approaches.  Efforts to publish an accepted space

 

doctrine have been largely futile due to changes in

 

technology and major disagreements on basic tenets of

 

military operations in space. (11:29)

 

     The U.S. Air Force has taken the lead in developing

 

military space doctrine.  The current version of AFM 1-1,

 

Basic Doctrine of the United States Air Force, contains

 

general doctrine that the Air Force claims is applicable to

 

air and space forces.  The first attempt at specific space

 

doctrine, AFM 1-6, Military Space Doctrine, was published in

 

1982, but later canceled.    According to military space

 

operators, neither has been considered useful doctrine for

 

space. (11:29)

 

     AFM 1-6 was flawed because instead of explaining how

 

U.S. space forces would be employed in future conflicts, it

 

simply restated public policy. (4:57)  Furthermore, AFM 1-1

 

and AFM 1-6 misstated the impact of the physical properties

 

of space. They were not grounded in history, nor founded on

 

the principles of war as applied to space. (5:15)

 

     AFM 1-1 views space as an extension of the atmosphere,

 

combining air and space forces into "aerospace" forces.

 

Space, however, is different than the air. The fundamental

 

characteristics of air forces -- speed, range and

 

flexibility -- do not apply to space forces in the same

 

ways.  Speed, for example, is bounded by orbital mechanics.

 

Speed is fixed for a given orbit.  At times, zero relative

 

speed is desirable in space as in geosynchronous orbit for a

 

communications satellite.  The characteristic "flexibility"

 

generally does not apply to space forces -- once in orbit,

 

space hardware is not easily modified. (5:14)

 

     The U.S. Air Force is currently working on a draft

 

space doctrine AFM 2-25, Space Operations, and a revision to

 

AFM 1-1, that will include updated thinking about the

 

military and space.  However, both documents are almost a

 

year away from publication. (11:38-39)

 

     Criticisms of existing official space doctrine reflect

 

the evolving nature of this new arena for military

 

operations.  Part of the problem stems from the word

 

"doctrine."  Doctrine has many different meanings and is

 

often confused with policy. (4:56)  According to Professor

 

I.B. Holley, Maj. Gen., USAFR, "military doctrine is what is

 

officially believed and taught about the best way to conduct

 

military affairs." (2:3)

 

     Lt.Col. Dennis M. Drew and Dr. Donald M. Snow, authors

 

of Introduction to Strategy, a basic text on strategy used

 

at U.S. military war colleges, say that "doctrine, in

 

general, has three purposes.  First it provides the working

 

medium for a thorough analysis of past experience -- the

 

ultimate distillation of lessons learned.  Second, it

 

provides the means of passing on this experience by

 

educating and allowing successors to avoid repeating the

 

same old mistakes.  Third, it provides guidance for future

 

actions and allows for a commonality of understanding

 

between superiors and subordinates that is essential during

 

conflict." (11:30)

 

     According to Drew, doctrine is developed through

 

experience and the accurate analysis and interpretation of

 

history. (5:15)

 

     New doctrines frequently emerge from unofficial sources

 

and become official later during a war or when demonstrated

 

in peacetime weapons systems tests or in military exercises.

 

One example is the writings of Capt. Alfred Thayer Mahan on

 

sea power at the turn of the century.  Despite their

 

influence on naval warfare and shipbuilding programs, they

 

were not officially embraced by the Navy until many years

 

after their release. (5:16)  Similarly, the Air Corps

 

Tactical School played a key role in the 1930s developing

 

and teaching air doctrine used in the early stages of World

 

War II, yet the official doctrine was not published until

 

1943. (2:3)

 

     Several unofficial space doctrines have been developed

 

in the last 30 years.  In "On Space Warfare: A Space Power

 

Doctrine", Lt.Col. David E. Lupton, USAF, identifies four of

 

the major schools of thought on space doctrine and argues

 

himself for a "space control" doctrine.  All of these

 

doctrinal schools are closely linked to strategic nuclear

 

strategies, since the first military use of space technology

 

was linked to arms control.

 

     The first school of space doctrine, labeled the

 

sanctuary doctrine, holds that space is to be used for

 

peaceful purposes and, therefore, is a sanctuary from war.

 

It speaks of "open skies" to conduct nuclear treaty

 

verification and provide strategic attack warning.  "It is a

 

doctrine born from the shootdown of Gary Powers and

 

Eisenhower's attempt to establish a sanctuary for space-

 

based national technical means." (9:118)

 

     The second school of space doctrine, the survivability

 

school, says that space systems are inherently vulnerable

 

due to the predictability of orbital mechanics and the ASAT

 

technology.  Proponents argue that a space denial strategy

 

is the best policy and that an ASAT capability is the best

 

deterrent.  They further do not believe that space systems

 

can be depended upon in time of war.

 

     The third school of space doctrine, the "high ground"

 

doctrine, argues for a space-based ballistic missile defense

 

"Star Wars" -- to assure survival in nuclear war   The

 

"high ground" school advocates space-based weapons systems

 

to resolve all conflicts whether in space or on the ground.

 

     The final school of doctrine, the control school,

 

argues that space forces need to assert space power just as

 

air forces and naval forces assert air power and sea power

 

respectively.  Space lines of communication are comparable

 

to sea lines of communication and must be controlled if war

 

is to be won either in space or in a terrestrial theater.

 

     Space control includes both ensuring free access and

 

use of space and the ability to deny use to a potential

 

enemy.   It includes the concept of space superiority

 

analagous to air superiority whereby an enemy use of a

 

region of space is denied for a specific period. It does not

 

require absolute control of all space. (5:27)

 

      Each doctrine was formulated when the Soviet Union was

 

the primary threat to U.S. national security.  The Soviet

 

Union was the only other major space power, and it had a

 

defined military space doctrine that advocated space

 

control.  Soviet doctrine dating from the 1960's declared

 

that space forces are to be integrated into combined arms

 

and that space forces were to do their part in accomplishing

 

the political goals of the state.  The Soviets viewed space

 

as another theater of war. (5:85)

 

     The Soviets built a military space program which

 

included a robust launch program to assure access to space.

 

They had the capability to surge operations in times of

 

crisis as demonstrated by launches of extra reconnaissance

 

and surveillance satellites during the 1973 Arab-Israeli War

 

and the Falklands War.  By 1989, the Soviets had roughly 50

 

different satellite systems, with missions including

 

reconnaissance, surveillance, strategic and tactical

 

targeting, launch detection and attack warning,

 

communications, navigation and weather. (5:38)

 

     In addition, the Soviets were first to develop an

 

operational ASAT in the early 1970s, an interceptor placed

 

in orbit that would maneuver close to its target and

 

detonate.  The Soviets pursued several ASAT technologies

 

including a ground-based laser program and an electronic

 

warfare program judged to have an ASAT capability. (1:23)

 

            The Soviet ASAT capability meant the sanctuary doctrine

 

was no longer viable.  The debate over military space

 

doctrine concentrated on the survivability, "high ground,"

 

and space control schools.

 

     Concern with the Soviet ASAT capability fueled a public

 

policy debate on U.S. ASAT development during the early

 

1980s.  This issue clouded the doctrinal debate on space.

 

     By the early 1980s, the U.S. military had become

 

increasingly reliant on space systems, and a doctrine based

 

on space control was necessary if the U.S. was to ensure the

 

uninterrupted use of these systems during conflict with the

 

Soviets.  Space would not remain a sanctuary in war if the

 

Soviets fought according to their doctrine.

 

     The Reagan administration supported the need to build

 

offensive and defensive space weapons to protect U.S.

 

national security interests in space. (5:46)  Development

 

began on an ASAT system that included a missile interceptor

 

launched from an F-15 aircraft.  Also in 1983, President

 

Reagan announced the Stategic Defense Initiative (SDI), a

 

vision for a program using new technologies and space-based

 

weapons to counter the strategic nuclear threat.

 

     Space weapons and the advocacy of military space

 

control was a controversial topic in Congress, however.

 

Congressional concerns centered on whether current treaties

 

permitted the development and deployment of space control

 

technology, or whether peace could be better attained and

 

maintained through arms control. (5:43)  The President got

 

funding for SDI research, but Congress banned testing of a

 

U.S. ASAT throughout the mid 1980s.  By 1989, the anti-ASAT

 

fervor subsided, and the Bush administration was allowed to

 

continue development of an ASAT. (5:46-47)

 

     Also in 1989, the Bush administration published "The

 

National Space Policy" which addressed military operations in

 

space.  Objectives included "(1) deterring, or if necessary,

 

defending against enemy attack; (2) assuring that forces of

 

hostile nations cannot prevent our own use of space; (3)

 

negating, if necessary, hostile space systems; and (4)

 

enhancing operations of United States and Allied forces."

 

(5:52).  This policy required a doctrine of space control.

 

The space control school prevailed, or so it seemed:;

 

     Current doctrinal debate has centered on refining a

 

military space control doctrine.  Discussions in

 

professional literature have analyzed the relative aspects

 

of space control.  Given the high cost of space systems and

 

shrinking federal budgets, should the U.S. concentrate on

 

active defensive measures, such as ASATs?  Or, should more

 

passive defensive measures be used, such as improving access

 

to space with a more robust launch architecture? (4 and 6)

 

     The end of the Cold War and the recent collapse of the

 

Soviet Union, however, brings a new twist to evolving

 

military space doctrine.  With no other space power a

 

threat, why bother with a doctrine of space control?

 

     The most pressing concern is that space programs are

 

proliferating throughout the world, and new space powers are

 

emerging.  Many nations have the desire, technological

 

capability and economic resources to obtain space systems

 

for both commercial and military use.  Relationships with

 

these nations that are or have the ability to become space

 

powers are changing in the vacuum of superpower politics.

 

Their attitudes toward the free use of space are unknown.

 

     Current allies and potential adversaries learned the

 

lesson of the effectiveness of military space systems during

 

Desert Storm.  Many have significantly increased their

 

research and development activity and many are pursuing

 

launch technology and satellite programs. (10:90)  Table 1

 

extracted from the 1992 annual "Report of the Secretary of

 

Defense to the President and the Congress" lists 31 nations

 

that have existing space systems or emerging space

 

technology.

 

 

TABLE 1 - SPACE SYSTEMS (WORLDWIDE) EXISTING AND EMERGING

SPACE TECHNOLOGY/SATELLITE COUNTRIES (10:91)

 

     Argentina               Iran              Russia

     Australia               Iraq              South Africa

     Brazil                   Israel            South Korea

     Belarus                  Italy             Spain

     Canada                   Japan             Taiwan

     China                    Kazakhstan        Thailand

     Czechoslovakia          Luxembourg        Turkey

     France                   Mexico            UAE

     Germany                  Netherlands       Ukraine

     India                    Pakistan          United Kingdom

     Indonesia                                 United States

 

     During the last 10 years, China, India and Japan have

 

launched communications satellites. (9:9)  China, India and

 

Israel are believed to have launched reconnaissance

 

satellites. (9:9)  Japan, France and Russia are offering

 

commercial launch services to countries capable of building

 

or buying space systems and who can also afford the price of

 

access to space.

 

     The number of countries possessing short- and medium-

 

ranged ballistic missiles is growing.  Former CIA Director

 

William Webster recently informed Congress that by the year

 

2000, at least six Third World countries probably will have

 

ballistic missiles with ranges up to 3,300 miles.  Four of

 

these countries developing missile capabilities have nuclear

 

weapons or advanced programs. (1:22)  Space-launch vehicle

 

technology and hardware are interchangeable with these of

 

ballistic missiles. (10:90)

 

     Today some nations, such as China, rely heavily ;o-n

 

foreign military sales to shore up their economies, to help

 

client states, or to broaden their influence. As former

 

Space Command deputy Maj. Gen. Robert A. Rosenberg, USAF

 

(Ret.), writes, "No one has told these states they can't

 

sell access to space and space systems the same way. Is it

 

reasonable to think that states who want to exercise their

 

sovereignty to the reaches of outer space can't buy their

 

way into space weaponry?  What about terrorist states?  What

 

about the next generation of Iranian leadership or the next

 

Qadhafi?" (9:122)

 

     Of additional concern is the problem of unemployed

 

Soviet scientists selling their space expertise to potential

 

adversaries pursing a military space program.

 

     U.S. military space policy and doctrine must address

 

the proliferation of dual-use (military and commercial)

 

space systems and technologies that could significantly

 

jeopardize U.S. national security interests.  The

 

acquisition of critical space-based information by

 

adversaries engaged in regional conflicts could have a

 

dramatic impact on the course of the battle. (10:90)

 

     France has launched SPOT, a commercial observation

 

satellite system capable of 10-meter ground resolution.

 

Although the system has modest military utility, an improved

 

SPOT is planned for the mid-1990's with improved resolution.

 

The French as well as the Russians sell imagery obtained

 

from these multispectral satellites on the open market, thus

 

making it available to countries unable to field their own

 

systems. (5:8, 9:117)

 

     Gen. Kutyna writes, "Just as we would not tolerate

 

enemy reconnaissance aircraft flying over our forces, we

 

must not allow any enemy satellites to provide militarily

 

useful data from space in wartime.  Our forces obviously

 

need a capability to counter this threat." (1:23)

 

     The growing number of space powers and the increased

 

access of military space technology in a multipolar world

 

increases the overall threat to U.S. space systems and the

 

forces they support.  If the U.S. military is to continue to

 

operate in space, a doctrine of space control is necessary

 

to protect U.S. space assets and deny the use of space to

 

adversaries.

 

     The importance of military space forces to warfighting

 

that was demonstrated in Operation Desert Storm will

 

increase as the new National Security Strategy is

 

implemented.  The new strategy with its pillars of nuclear

 

deterrence, forward presence, crisis response and

 

reconstitution will be more reliant on space systems.  Under

 

the Base Force concept within the strategy, the U.S. will

 

have a smaller force structure and fewer forward operating

 

bases from which to respond to regional crises.

 

     As the U.S. presence in Europe and the Far East is

 

reduced, forward-deployed ground support systems such as

 

communications sites, navigational aids, weather stations

 

and collection activities will be eliminated.  Space systems

 

will replace these terrestrial systems to provide essential

 

support functions. (3:17-18)

 

     Because of their global nature, high readiness and

 

rapid response, space forces may be the only "on the scene"

 

capabilities in the early stages of future regional

 

conflicts. (10:85)  Furthermore, space forces can provide

 

real-time or near-real-time support to deployed or enroute

 

forces and national command authorities during a crisis.

 

     As Gen. Kutnya states, ". .  the ability of the U.S. to

 

use any of its force packages depends heavily on its ability

 

to operate in the high ground of space.  If we are to

 

maintain peak efficiency of our combat forces in an era of

 

reduced force levels and fewer forward operating locations,

 

our space systems must be available to our land, sea and air

 

forces when they are needed in both peacetime and wartime."

 

(1:24)

 

     In summary, space forces have become an integral part

 

of the U.S. warfighting capability.  Maturing space doctrine

 

must meet the challenges of the future.  In the evolving

 

post-Cold War world, new space powers are emerging that may

 

bring new threats to U.S. national security.  A space

 

control doctrine will assure the U.S. access to space and

 

the survivability of systems during conflict.  A space

 

control doctrine will allow the U.S. to maintain the space

 

lines of communication to support terrestrial forces' around

 

the world.  A space control doctrine can meet the challenges

 

of future.

 

                                 BIBLIOGRAPHY

 

1.  Kutyna, Donald J., Gen, USAF.  "Spacecom:  We Lead

      Today, But What About Tomorrow?"  Defense 91,

      July/August 91, pp. 20-29.

 

2.  Lupton, David E., LtCol, USAF (Ret).  On Space Warfare. A

      Space Power Doctrine.  Maxwell Air Force Base: Air

      University Press, 1988.

 

3.  Moorman, Thomas S., Jr., LtGen, USAF.  "Space, A New

      Strategic Frontier." Airpower Journal, VI, 1 (Spring

      1992), 14-23.

 

4.  Parrington, Alan J., LtCol, USAF.  "U.S. Space Doctrine -

      Time for a Change?"  Airpower Journal, III, 3 (Fall

      1989), 51-61.

 

5.  Petersen, Steven R., Maj, USAF.  Space Control and the

      Role of Antisatellite Weapons (Research Report No.

      AU-ARI-90-7). Maxwell Air Force Base: Air University

      Press, May 1991.

 

6.  Power, John W., Capt, USAF. "Space Control in the Post-

      Cold War Era."  Airpower Journal, IV, 4 (Winter

      1990), 24-33.

 

7.        President of the United States.  National Security

      Strategy of the United States.  Washington, D.C.:

      U.S. Government Printing Office, August 1991.

 

8.  President of the United States.  U.S. National Space

      Policy."  Washington, D.C.: U.S. Government Printing

      Office, November 2, 1989.

 

9.  Rosenberg, Robert A., MajGen, USAF (Ret). "Building a

      U.S. Military Consensus toward Space Doctrine."

      Building a Consensus Toward Space Proceedings of

      the Air War College 1988 Space Issues Symposium. 

      Maxwell Air Force Base: Air University Press,

      April 1990.

 

10. U.S. Department of Defense. Report of Secretary of

      Defense to the President and the Congress, February

      1992. Washington D.C.: U.S. Government Printing

      Office, 1992.

 

11. Wolf, James R., Capt, USAF.  "Toward Operational-Level

      Doctrine for Space: A Progress Report."  Airpower

      Journal, V, 2 (Summer 1991), 28-40.

 

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