News

hard.copy Update 10/23/98

ARTICLE CITATIONS FROM COMMERCIALLY PUBLISHED JOURNALS AND NEWSLETTERS.

 

$1b BMD Boost Seen Depending On Supplemental Staying At $7.5b. Aerospace Daily, Oct 15, 1998, pp 81-82

According to Congressional sources, $1b supplemental defense spending will be added to the $3.437b appropriations for the BMDO in FY99. Once the missile defense funding level is settled, the HNSC and SASC will decide how to apportion those funds among various BMDO programs.

Descriptors: BMDO $1b plus-up supplemental appropriation HNSC SASC

UPDATE: Oct 23, 1998, No. 01

 

Boeing Eyes Brimstone Missile For Use On JSF. Aerospace Daily, Oct 19, 1998, p 102

Boeing would like to see its Brimstone missile, a derivative of the radio-frequency-guided Hellfire missile, as a baseline weapon for the Joint Strike Fighter. It appears that the Maverick missile is the main competitor.

Descriptors: Boeing Brimstone Hellfire Joint Strike Fighter Missile

UPDATE: Oct 23, 1998, No. 02

 

Boeing Wins Bulk Of Launch Services For EELV. Aerospace Daily, Oct 19, 1998, p 99

The initial launch services for the Evolved Expendable Launch Vehicle (EELV) have been awarded to Boeing in a $1.37B contract for 19 missions.

Descriptors: EELV Boeing

UPDATE: Oct 23, 1998, No. 03

 

CBO Offers Five Options For UAV Programs. Aerospace Daily, Oct 19, 1998, pp 103-104

A recent CBO report, "Options For Enhancing The Department Of Defense's Unmanned Aerial Vehicle Programs", notes that DoD has trouble developing and fielding UAV systems. Two UAVs have been deployed or are in production (Pioneer and Predator), and three more are in development (Outrider, Global Hawk, Darkstar). According to CBO, DoD spends about $600m a year on UAV programs.

Descriptors: UAV CBO SASC developing fielding deploy production Pioneer Predator Darkstar Outrider Global Hawk

UPDATE: Oct 23, 1998, No. 04

 

International Interest. Aerospace Daily, Oct 19, 1998, p 97

Allies have expressed interest in Pentagon efforts to detect threat radars, according to Tony Greico, top electronic warfare official in OSD.

Descriptors: OSD electronic warfare threat radar allies

UPDATE: Oct 23, 1998, No. 05

 

Mobile Laser. Aerospace Daily, Oct 19, 1998, p 97

The Army is interested in possible future procurement of a mobile version of THEL, which the US and Israel are jointly developing to defend against short range missiles.

Descriptors: THEL Army procurement mobile US Israel short range missile

UPDATE: Oct 23, 1998, No. 06

 

Try, Try Again. Aerospace Daily, Oct 19, 1998, p 97

Senate Majority Leader Trent Lott (R-LA) says he will be prepared to bring to the next Congress legislation declaring it US policy to deploy a NMD system as soon as technologically possible.

Descriptors: Senate Lott legislation US policy NMD

UPDATE: Oct 23, 1998, No. 07

 

Holding The CTBT Hostage In The Senate: The "Stealth" Strategy Of Helms And Lott. Arms Control Today. Daryl G. Kimball, Jun 01, 1998, pp 3-9

The politics associated with the CTBT are discussed. In spite of the widespread public sentiment in favor of the treaty, it has not gotten out of the Foreign Relations Committee. Sen Helms has stated that the committee will consider the CTBT only after the Senate has dealt with agreements related to the ABM Treaty and the Kyoto Protocols. Sen Helms may be delaying consideration of the treaty for two reasons. Holding the treaty hostage to the BMD goals of administration critics allows Helms to blame inaction on nuclear security matters on the executive branch. It also intimidates many Senate Republicans from expressing support for the test ban.

Descriptors: CTBT ABM Treaty Kyoto Protocol Helms Lott Senate Foreign Relations Committee India Pakistan Southeast Asia international relations politics ratification signatory delaying tactics

UPDATE: Oct 23, 1998, No. 08

 

India, Pakistan Respond To Arms Control Initiatives. Arms Control Today. Howard Diamond, Jun 01, 1998, p 24

In response to India's and Pakistan nuclear tests, the international community has called upon the two states to resolve their differences. The US has imposed the harshest economic sanctions on the two countries, which has served to get their attention. Recommended actions for the two state includes signing the CTBT; participation in the Conference on Disarmament; renewal of bilateral talks (including Kashmir); and taking steps to deescalate nuclear weapons and ballistic missiles.

Descriptors: India Pakistan arms control initiative CTBT Talbott economic sanctions international relations political science Kashmir disarmament NPT World Bank IMF business dual use export technology transfer

UPDATE: Oct 23, 1998, No. 09

 

Iraqi Nuclear File Open, New VX Concerns. Arms Control Today. Howard Diamond, Jun 01, 1998, p 29

The UN Security Council rejected Russia's proposal to conclude investigations into Iraq's past nuclear weapons program. The rejection was predicated on unresolved concerns about Iraqi residual capability and the earlier discovery of new evidence of VX capability. In early June, the UN was briefed on roadblocks in the commission's effort to eliminate Iraq's chemical and biological programs. The briefings were at the request of France and Russia, who have accused UNSCOM of dragging out the investigation.

Descriptors: Iraq nuclear file VX chemical weapon biological weapon UNSCOM disarmament France Russia Butler Richardson stabilizing agent uranium enrichment nuclear expertise

UPDATE: Oct 23, 1998, No. 10

 

New Missile "Threat" Gap. Arms Control Today. Spurgeon M. Keeny, Jr., Jun 01, 1998, p 2

This editorial takes to task some of the underlying assumptions of the Rumsfeld Commission. For example, the Commission believes that "rogue states" will work to deploy simplified ICBMs build in underground bunkers. Thus the missiles could suddenly appear with nominal testings to embarrass US intelligence and threaten US interests. The author recommends, not a crash development program to protect against rogue missiles, but rather aggressive pursuit of the MTCR, ratification of the CTBT, and efforts to end missile and WMD in the rogue states.

Descriptors: Rumsfeld Commission WMD nuclear nonproliferation Iran Iraq Korea Shelton ICBM rogue state missile threat CTBT MTCR Fortress America editorial

UPDATE: Oct 23, 1998, No. 11

 

Rumsfeld Panel Releases Report On Missile Threat To US. Arms Control Today. Craig Cerniello, Jun 01, 1998, pp 28,33

The Rumsfeld Commission concluded that the US might have little or no warning before rogue states, like North Korea, Iraq, or Iran, would deploy long range ballistic missiles capable of reaching US territories. Republicans in Congress are using the study as justification to pursue NMD. The Clinton Administration, however, has not endorsed NMD and has not backed away from the 1995 National Intelligence Estimate on the emerging ballistic missile threat to North America.

Descriptors: Rumsfeld Commission missile threat US NIE NMD 2010 rogue state North Korea Iraq Iran Gates CIA nuclear weapon biological mature technology intelligence estimate

UPDATE: Oct 23, 1998, No. 12

 

Russia, India Move Forward With Deals On Arms, Nuclear Power. Arms Control Today. Howard Diamond, Jun 01, 1998, p 25

Even as the US is levying harsh economic sanctions on Pakistan and India for their nuclear tests in May, Russia is moving ahead with plans to sell New Delhi two nuclear power plants. Russia has also concluded an agreement with the Indian government to provide more military, space, and nuclear related technology. As a member of the Nuclear Suppliers Group, Russia is obligated not to sell nuclear materials to non-nuclear weapons states that do not have IAEA safeguards in place, such as India. Other areas of agreement between Moscow and New Delhi include joint development of the S-300V anti-tactical ballistic missile system, SU-30 MK1 fighters and MIG AT jet trainers upgrades, and integration of India's Akash surface to air missile with the S-300V.

Descriptors: India Pakistan arms control Russia economic sanctions nuclear supplies nuclear reactor IAEA S-300V fighter jet trainer Akash missile aircraft carrier sales proliferation budget technology transfer weaponization

UPDATE: Oct 23, 1998, No. 13

 

Washington Outlook: Defending NMD. Aviation Week & Space Technology. James R. Asker, Oct 19, 1998, p 29

Senator Trent Lott underscored that missile defense got a boost - he estimated $700m - in a supplemental $7-8b defense spending bill folded into appropriations measure for FY99. It appears that $249m in missile defense funds would be added to the SBIRS satellite program, $135m to the Navy's Theater Wide program, $125m to PAC-3, $120m to THAAD, plus an extra $45m for THAAD associated radar, according to preliminary figures by the Council for a Livable World, a defense reform advocacy group.

Descriptors: NMD Funding FY99 Trent Lott

UPDATE: Oct 23, 1998, No. 14

 

Annan Offers Concept For Review Of Iraqi Cease Fire Compliance. BMD Monitor, Oct 16, 1998, p 347

In a private meeting with the UN Security Council, Sec Gen Kofi Annan offered a concept for comprehensive review of Iraq's compliance with the Gulf War cease fire demands.

Descriptors: Annan UN Security Council Iraq compliance Gulf War cease fire

UPDATE: Oct 23, 1998, No. 15

 

Army Secretary Supports THAAD. BMD Monitor, Oct 16, 1998, p 349

Army Secretary Luis Caldera backed the THAAD program, noting that some of THAAD's problems could be attributed to the accelerated schedule put in place due to the need to put the TMD system in the field.

Descriptors: THAAD problem accelerated schedule TMD

UPDATE: Oct 23, 1998, No. 16

 

Arrow Program Benefits US And Israel. BMD Monitor, Oct 16, 1998, p 348

According to Arrow Program Manager Joe Butler, all development work on ARROW provides the US with design, analysis, ground test, flight test and integration data. It is useful in reducing risks in other programs, providing lessons learned in technical areas. Additionally, the program promotes regional stability, interoperability and technology.

Descriptors: Arrow benefit US Israel design analysis ground test flight test integration risk reduction threat

UPDATE: Oct 23, 1998, No. 17

 

Costello: NMD Program Not "A Rush To Failure". BMD Monitor, Oct 16, 1998, pp 343-345

LtGen John Costello, new commander of Army SMDC, is interviewed, declares the NMD program "not a rush to failure". He discusses the difficulty of achieving a common interceptor for THAAD, noting problems of meeting both THAAD and Navy Upper Tier requirements. He notes that SSDC will continue to focus on space products and technology, citing Patriot PAC-3, THAAD, and MEADS.

Descriptors: Costello SSDC NMD failure common interceptor THAAD Navy Upper Tier Patriot PAC-3 THAAD MEADS

UPDATE: Oct 23, 1998, No. 18

 

Decision On MEADS May Come This Month. BMD Monitor, Oct 16, 1998, p 349

With program funding for MEADS in jeopardy, the MEADS program managed by BMDO requires a decision by SecDef Cohen. The program now involves the US, Germany, and Italy.

Descriptors: MEADS funding FY99 BMDO US Germany Italy

UPDATE: Oct 23, 1998, No. 19

 

Hamre Details Three Options For THAAD Missile. BMD Monitor, Oct 16, 1998, p 352

DepSecDef John Hamre told a SASC hearing on October 2 that cancellation of THAAD is not under immediate consideration at DoD.

Descriptors: THAAD testing evaluation failure SASC hearing

UPDATE: Oct 23, 1998, No. 20

 

Lockheed Martin Offers New Passive Surveillance System. BMD Monitor, Oct 16, 1998, p 349

Lockheed Martin unveiled a new passive surveillance system, the Silent Sentry system, at the Association of the US Army annual conference this week. The system will be able to detect a wide range of airborne objects, including rockets, in real time with high accuracy.

Descriptors: Silent Sentry passive surveillance Lockheed Martin rocket detection

UPDATE: Oct 23, 1998, No. 21

 

New Defense Threat Agency Up And Running. BMD Monitor, Oct 16, 1998, p 350

The Defense Threat Reduction Agency (DTRA) officially opened on October 1. The mission of the agency is to reduce the threat to the US and its allies from nuclear, chemical, biological, conventional and special weapons. Led by Jay Davis, formerly of LLNL, the agency has a FY99 budget of $1.9b, and reports to the UnderSecDef for Acquisition and Technology. Its web site is http://www.dtra.mil.

Descriptors: Defense Threat Reduction Agency DTRA Davis FY99 funding reporting mission website URL

UPDATE: Oct 23, 1998, No. 22

 

Russian Official Urges Arms Treaties With US To Preserve The Nuclear Balance. BMD Monitor, Oct 16, 1998, p 346

According to Communist Deputy Prime Minister Yury Maslyukov, Russia must move ahead with START II and START III and other arms limitation treaties with the US to preserve the nuclear balance. He also said the country needs a program to modernize its strategic forces.

Descriptors: Russia START II START III treaties US nuclear balance strategic forces

UPDATE: Oct 23, 1998, No. 23

 

THEL Program Readies For Next Step, TRW Expects More Work. BMD Monitor, Oct 16, 1998, p 348

The battle management component of the THEL demonstrator system has moved to the High Energy Laser Systems Test Facility, NM, and will await the arrival of the laser subsystem and pointer-tracker system which are being tested. All three systems are expected to be moved to HELSTF by year end.

Descriptors: THEL component battle management laser pointer tracker HELSTF

UPDATE: Oct 23, 1998, No. 24

 

TMD Still Top Priority In Korea. BMD Monitor, Oct 16, 1998, p 345

Gen John Tilelli, commander in chief of the UN Command / Combined Forces Command / Commander for US Forces Korea, told the US Army Conference this week that TMD continues to be the top priority for his command, because it is both an active and passive mission. He points to strategic intelligence, economies, and readiness as key factors in the TMD ability to protect a force.

Descriptors: TMD Korea threat strategic intelligence economy readiness

UPDATE: Oct 23, 1998, No. 25

 

Two Successful THAAD Radar Tests, Flight Test Pushed Into 1999. BMD Monitor, Oct 16, 1998, pp 352-353

The final tactical configuration for THAAD radar was used successfully at White Sands Missile Range in late September, using a NASA test and a Missile Technology Demonstration (MTD) as targets of opportunity.

Descriptors: THAAD radar test evaluation success tactical configuration White Sands Missile Range MTD target opportunity

UPDATE: Oct 23, 1998, No. 26

 

US Wants Bio Weapons Convention Strengthened. BMD Monitor, Oct 16, 1998, p 346

John Holum, Director of the Arms Control and Disarmament Agency, told a press conference in Geneva on October 6 that more time needs to be spent negotiating a new protocol to strengthen the 1972 BWC. The US believes four elements are essential to the new protocol: to have legally binding declarations about activities; to have inspector access with flexible mandate; to have all declaration merited sites declared; to have a professional organization to implement control.

Descriptors: BWC Holum WMD declaration investigation enforcement management

UPDATE: Oct 23, 1998, No. 27

 

Japanese Government To Say TMD 'Compatible' With 1969 Law. Defense Daily, Oct 23, 1998, pp 5-6

The Japanese government is about to announce that the development of a satellite-dependent missile defense system does not violate a 1969 Japanese Diet resolution limiting space usage to peaceful purposes, according to an article yesterday in one of Japan's leading newspapers, Asahi Shimbun.

Descriptors: Japanese Diet resolution TMD satellite space defense

UPDATE: Oct 23, 1998, No. 28

 

Spending Bill Gives DoD $1 Billion To Hasten Missile Defense. Defense Daily. Sheila Foote, Oct 21, 1998, p 1

The FY99 omnibus spending bill contains nearly $6b in emergency supplemental appropriations for DoD, including $1b the Pentagon can use to accelerate any of its ballistic missile defense programs. Appropriators gave the SecDef discretion on how to spend the $1b on missile defense with the hope that the secretary could make the best decision on how to accelerate the fielding of a ballistic missile defense capability.

Descriptors: omnibus spending bill DoD ballistic missile defense supplemental appropriations Congress Secretary Defense

UPDATE: Oct 23, 1998, No. 29

 

Verdict On MEADS Awaits Nov 10 DRB Meeting. Defense Daily. Vago Muradian, Oct 22, 1998, p 3

A final verdict on the multinational MEADS will be made at a November 10 meeting of the Defense Resource Board (DRB), the high-level Defense Department panel responsible for making major Pentagon budget decisions.

Descriptors: MEADS decision DRB Defense Research Board

UPDATE: Oct 23, 1998, No. 30

 

Japan To Formalize, Fund TMD Joint Research. Defense News. Naoaki Usui, Oct 19, 1998, p 8

The Japanese government on Oct 20 formally will approve a joint theater missile defense (TMD) research program with the United States, including initial funding in the 1999 budget.

Descriptors: budget theater missile defense TMD funding Japan council supreme Block II Theater Wide Defense System

UPDATE: Oct 23, 1998, No. 31

 

Lockheed Martin, US Navy Battle Over Missile Options. Defense News. Robert Holzer, Oct 19, 1998, pp 4, 43

While Lockheed Martin officials are confident a review of the US Navy's land attack selection will validate the company's Army Tactical Missile System, Navy officials stand by their choice of Raytheon Systems Co.'s Land Attack Standard Missile.

Descriptors: Navy Army LASM ATACMS rival missile Lockheed Martin Raytheon maker technology fire support SM-2 warhead

UPDATE: Oct 23, 1998, No. 32

 

Mediterranean-Area Missile Race Continues: Turkish, Greek, Cypriot Officials Scramble To Bolster Air Capabilities. Defense News. Douglas Barbie, Umit Enginsoy, Oct 19, 1998, pp 18, 21

While the politically charged delivery of the Russian S-300PMU to Cypriot forces has been put off until the first quarter of next year, according to Russian and Turkish officials, regional air-defense procurement programs continue to gather speed.

Descriptors: Russian Turkish speed S-300PMU missile system ballistic SA-15 Tor MEADS short range

UPDATE: Oct 23, 1998, No. 33

 

Pentagon Abandons EFOGM. Defense News. George I. Seffers, Oct 19, 1998, p 8

The US Army's Enhanced Fiber Optic Guided Missile (EFOGM) program is on its deathbed. The Army is appealing the Pentagon comptroller's decision to withhold the $20m recently appropriated by Congress for the program. The Office of the Secretary of Defense is refusing to release the money to the Army because Congress did not authorize it be spent.

Descriptors: Enhanced Fiber Optic Guided Missile EFOGM program Congress missile TOW system military Advanced Concept Technology vital antitank weapon

UPDATE: Oct 23, 1998, No. 34

 

Pentagon Board To Make Last-Ditch MEADS Choice. Defense News. Lisa Burgess, Oct 19, 1998, pp 1, 42

The Pentagon's Defense Acquisition Board is preparing to meet Oct 28 for a make-or-break decision on the trinational Medium Extended Air Defense System (MEADS). The Defense Acquisition Board's formal decision will be the final Pentagon word on whether to budget long-term funds for the program as is, redesign it to cut costs, or simply kill US participation.

Descriptors: medium extended air force defense system MEADS trinational kill participation budget funds deathbed cut acquisition board

UPDATE: Oct 23, 1998, No. 35

 

Pentagon Gains Missile Funds, Extra $9 Billion. Defense News. Colin Clark, Oct 19, 1998, pp 4, 42

Congress and White House suprised many in the US military and industry last week by agreeing to $9.2 billion in additional 1999 defense spending, a move likely to ease pressure at the Pentagon to drain weapon programs for contingencies and readiness shortfalls.

Descriptors: military industry shortfalls defense spending programs weapon contingencies readiness intelligence floods appropriations committee information bill

UPDATE: Oct 23, 1998, No. 36

 

UK Missile Bid Seen As Europe Litmus Test. Defense News. Douglas Barbie, Oct 19, 1998, pp 10, 16

The British Royal Air Force will choose the primary air-to-air missile for its Eurofighter aircraft next year, taking either a follow-on to the US-made AIM-120 Advanced Medium Range Air-to-Air Missile or the Meteor, now under development by a European consortium. Because the missile now is available, the Air Force initially will field the Eurofighters with the AIM-120, even if the Meteor wins the contest.

Descriptors: AIM-120 Meteor Air Force contest ASRAAM missile battle AIM-120B

UPDATE: Oct 23, 1998, No. 37

 

Cohen Gives Flexibility In Spending $1 Billion For Missile Defense. Defense Week. John Donnelly, Oct 19, 1998, p 2

Contrary to rumors heard late last week, the $1b included for missile defense in the FY99 defense supplemental was not earmarked for any particular programs. Instead, SecDef Cohen may dispense the funds as he sees fit.

Descriptors: FY99 defense supplemental missile defense Cohen flexibility

UPDATE: Oct 23, 1998, No. 38

 

Gulf States-USA Joint Work On Missile Threat Is 'Imperative'. Jane's Defence Weekly. Ed Blanche, Oct 21, 1998, p 6

Speaking in Kuwait on 12 October, US Defense Secretary Cohen declared that Washington "would hope to be in a situation to cooperate with our friends in the region to either have them share and join in the research and development of an anti-missile defense system, or cooperate in the future, as far as deployment is concerned," on a system that would likely be beyond the means of any individual state.

Descriptors: SecDef Cohen GCC Gulf Cooperation Council TMD Cooperation

UPDATE: Oct 23, 1998, No. 39

 

IAEA Finds No Nuclear Threat From Iraq. Jane's Defence Weekly. Thalif Deen, Oct 21, 1998, p 5

The International Atomic Energy Agency (IAEA) has said that Iraq's known nuclear weapons related assets have either been destroyed, removed or rendered harmless over the past few years. In a report to the Security Council, IAEA Director General Mohammed El-Baradei said all related infrastructure was undergoing monitoring and verification. El-Baradei said his statements were made on the basis of all available, credible information.

Descriptors: IAEA International Atomic Energy Agency El Baradei Iraq Nuclear Threat

UPDATE: Oct 23, 1998, No. 40

 

Interview: Gen Ilan Biran, Director General Of Israel's Ministry Of Defense. Jane's Defence Weekly. Ami Ettinger, Oct 21, 1998, p 40

Referring obliquely to the threat of long range nuclear missile attack, Gen Biran notes: "Those who will be tempted to play this game may find themselves hit by their own weapons," a strong hint that counterforce and boost phase intercept are a top priority. Gen Biran also stressed that the Nautilis air defense laser program would reach initial operational capability by the fourth quarter of 1999. "If we should decide to protect a larger area, we will have to embark on another development schedule which is currently not budgeted," he says.

Descriptors: Gen Ilan Biran Israel Deterrence Strategy Defense Infrastructure F-15I Decision Space Programs

UPDATE: Oct 23, 1998, No. 41

 

Russia Develops MEADS Lookalike. Jane's Defence Weekly. Christopher F. Foss, Oct 21, 1998, pp 18-19

Russia is developing a new mobile medium range surface to air missile (MSAM), called Trieumf, under the leadership of the Almaz Central Design Bureau. A typical Trieumf fire unit would consist of one fire control system capable of carrying out target surveillance and target tracking functions; three 12-missile SAM launchers; and one missile re-supply vehicle. The solid propellant missiles have a range from 1km to 50km and from 10km to 25km in altitude.

Descriptors: MSAM Mobile Medium Range Surface Air Missile Trieumf Almaz

UPDATE: Oct 23, 1998, No. 42

 

USA And Israel To Trial Missile Interoperability. Jane's Defence Weekly. Scott Gourley, Oct 21, 1998, p 4

Battlefield interoperability between Israel's Arrow and Patriot air-defense system, and US Army Patriot elements supported by offshore US Navy Aegis capabilities is to be demonstrated in an exercise next May. Brig Gen Daniel Montgomery, US Army POE for Air and Missile defense explained, "We're building an interface box to use Link 16 JTIDS radio capability to pass information back and forth between the two systems so that they can fight effectively together."

Descriptors: Arrow Patriot Aegis Battlefield Interoperability Link 16 JTIDS Arrow/Link 16 Upgrade Capability ALUC

UPDATE: Oct 23, 1998, No. 43

 

Impact Of A Distributed Architecture For Space-Based Radar. Journal Of Spacecraft And Rockets. Douglas P. Wickert, Graeme B. Shaw, Daniel Hastings, Sep 01, 1998, pp 703-713

Through a process of system architecture analysis, system cost modeling, and system architecture optimization, the feasibility is assessed of performing the surveillance function of the next generation airborne warning and control system mission from a space based radar platform. A distributed operations concept is considered, which reduces the size of the satellites required, increases system reliability, improves system performance, and reduces the system cost compared to monolithic designs. The system analysis methodology relies on the specification of a set of mission performance requirements. Competing system architectures can then be compared quantitatively on the basis of a simple cost metric. The cost metric used reflects the cost to initial operating capability and consists of subsystem, reliability, and constellation components. The architecture design process minimizes the cost metric while ensuring compliance with the established performance requirements. It is shown that there is an optimal level of distribution that minimizes the cost.

Descriptors: impact distributed architecture space based radar SBR early warning surveillance satellite cluster size minimization cost range equation search radar false alarm reliability redundancy optimization AWACS

UPDATE: Oct 23, 1998, No. 44

 

Launch Vehicle Concept With Tandem Staging And Air Collection. Journal Of Spacecraft And Rockets. James A. Martin, Brian T. Isaac, Tryshanda Moton, Sep 01, 1998, pp 660-666

A launch vehicle concept was studied for Earth-to-orbit flight using airbreathing propulsion in the booster. The orbiter is arranged forward of the booster, in a tandem arrangement, for improved aerodynamics, packaging, and staging. The booster has air collection and enrichment hardware to collect oxidizer for the orbiter during flight. The results have shown some advantages of the tandem arrangement and air collection.

Descriptors: launch vehicle concept tandem staging air collection ACE aerodynamic analysis propulsion orbiter trajectory sizing booster trajectory interstage results parallel staging comparison configuration stability trim HRST

UPDATE: Oct 23, 1998, No. 45

 

Minimum Heating Entry Trajectories For Reusable Launch Vehicles. Journal Of Spacecraft And Rockets. Robert Windhorst, Mark Ardema, Jeffrey Bowles, Sep 01, 1998, pp 672-682

A finite control volume heat transfer analysis is coupled to a flight-path optimization and integration algorithm for the purpose of calculating conductive heat rates and transient temperature effects within the thermal protection system of a reusable launch vehicle. Results are obtain for three different thermal protection system concepts: tile, blanket, and metallic.

Descriptors: minimum heating entry trajectory reusable launch vehicle flight path optimization integration algorithm conductive heat rate transient temperature thermal energy absorption heat load stagnation

UPDATE: Oct 23, 1998, No. 46

 

Optimal Performance Of A Dual-Fuel Single-Stage Rocket. Journal Of Spacecraft And Rockets. Guido Colasurdo, Dario Pastrone, Lorenzo Casalino, Sep 01, 1998, pp 667-671

The theory of optimal control is used to maximize the performance of a single stage rocket that is powered by liquid oxygen (LOX)/kerosene (RP-1) in parallel with LOX/liquid hydrogen engines. For the sake of simplicity and because of the theoretical nature of the work, the rocket motion is analyzed in the absence of gravitational and aerodynamic forces; either the vehicle gross mass or the dry mass is minimized for the required payload and velocity increment. The analysis provides the optimal values of the constant mixture ratios of the engines and the best time for switching off the hydrocarbon engine. The results confirm that the use of a hydrocarbon engine at liftoff is recommended for minimum system dry mass, whereas it is required only for the highest velocity increments in the case of minimum gross mass. The influence of the thrust level and engine mass on the rocket performance is also discussed.

Descriptors: optimal performance dual fuel single stage rocket LOX kerosene liquid hydrogen hydrocarbon engine control boundary conditions oxidizer mixtures acceleration constraint

UPDATE: Oct 23, 1998, No. 47