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Scientific and Technical Aerospace Reports Volume 38 July 28, 2000

Scientific and Technical Aerospace Reports Volume 38 July 28, 2000

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<strong>2000</strong>0066577 Air Force Inst. of Tech., Wright-Patterson AFB, OH USA<br />

Reducing Aircraft Quick-Turn Ground Times in the European Environment<br />

Carlson, Karn L.; Jan. 1999; 47p; In English<br />

Report No.(s): AD-A372327; AFIT/GMO/LAL/99Y-2; No Copyright; Avail: CASI; A03, Hardcopy; A01, Microfiche<br />

The Air Force has a limited number of air mobility aircraft <strong>and</strong> aircrews <strong>and</strong> these resources are becoming increasingly<br />

strained. Added to this, our workload is increasing - we are involved in an ever-increasing number of operations <strong>and</strong> exercises.<br />

Instead of working harder we need to work smarter, by looking for ways to process our aircraft more quickly <strong>and</strong> efficiently, yet<br />

maintain the needed safety st<strong>and</strong>ards.<br />

DTIC<br />

Flight Crews; Mobility<br />

10<br />

04<br />

AIRCRAFT COMMUNICATIONS AND NAVIGATION<br />

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<strong>2000</strong>0061967 Computer Sciences Corp., Lanham, MD USA<br />

Autonomous Relative Navigation for Formation-Flying Satellites Using GPS<br />

Gramling, Cheryl, NASA Goddard Space Flight Center, USA; Carpenter, J. Russell, NASA Goddard Space Flight Center, USA;<br />

Long, Anne, Computer Sciences Corp., USA; Kelbel, David, Computer Sciences Corp., USA; Lee, Taesul, Computer Sciences<br />

Corp., USA; [<strong>2000</strong>]; 10p; In English; 15th; Spaceflight Dynamics, Jun. <strong>2000</strong>, Biarritz, France<br />

Contract(s)/Grant(s): GS-35F-4<strong>38</strong>1G; No Copyright; Avail: CASI; A02, Hardcopy; A01, Microfiche<br />

The Goddard Space Flight Center is currently developing advanced spacecraft systems to provide autonomous navigation<br />

<strong>and</strong> control of formation flyers. This paper discusses autonomous relative navigation performance for a formation of four eccentric,<br />

medium-altitude Earth-orbiting satellites using Global Positioning System (GPS) St<strong>and</strong>ard Positioning Service (SPS) <strong>and</strong><br />

”GPS-like ” intersatellite measurements. The performance of several c<strong>and</strong>idate relative navigation approaches is evaluated. These<br />

analyses indicate that an autonomous relative navigation position accuracy of 1meter root-mean-square can be achieved by differencing<br />

high-accuracy filtered solutions if only measurements from common GPS space vehicles are used in the independently<br />

estimated solutions.<br />

Author<br />

Global Positioning System; Autonomous Navigation; Satellites; Guidance (Motion)<br />

<strong>2000</strong>0063533 Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA USA<br />

JPL Global GPS Network<br />

Moore, A. W., Jet Propulsion Lab., California Inst. of Tech., USA; Stowers, D. A., Jet Propulsion Lab., California Inst. of Tech.,<br />

USA; Khachikyan, R., Jet Propulsion Lab., California Inst. of Tech., USA; Marcin, M. R., Jet Propulsion Lab., California Inst.<br />

of Tech., USA; Harris, I. L., Jet Propulsion Lab., California Inst. of Tech., USA; Zumberge, J. F., Jet Propulsion Lab., California<br />

Inst. of Tech., USA; [1998]; 10p; In English; No Copyright; Avail: CASI; A02, Hardcopy; A01, Microfiche<br />

The research described in this viewgraph was carried out by the Jet Propulsion Laboratory (JPL), California Institute of<br />

Technology, under a contract with the National Aeronautics <strong>and</strong> Space Administration (NASA). JPL currently operates more than<br />

55 permanent, continuously operating GPS ground stations for NASA many in conjunction with international <strong>and</strong> regional agencies.<br />

The data are automatically uploaded from the remote stations, processed, <strong>and</strong> distributed, with a high degree of reliability.<br />

Derived from text<br />

Global Positioning System; NASA Programs; Data Processing; Networks

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