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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <title>Technical Sessions</title> </HEAD> <BODY BGCOLOR="ffffff"> <h2> 1997 AAS/AIAA Space Flight Mechanics Conference</h2> <h2>Technical Sessions</h2> <dl> <dt><h3> SESSION 1 ORBITAL MECHANICS </h3> <h4> 8:30 AM Monday, February 10 Enterprise </h4> <h4> Chair: DR. FELIX HOOTS, General Research Corporation </h4> <ul> <li><a href="abstracts/97-100.html"><b>AAS 97-100</b></a> -- <b>ORBIT ANALYSIS SOFTWARE SURVEY 1996 UPDATE ,</b> E. V. Beck and C. A. Boelitz, U.S. Air Force Phillips Laboratory <li><a href="abstracts/97-101.html"><b>AAS 97-101</b></a> -- <b>ALTERNATIVE ORBITAL MECHANICS ANALYSIS ,</b> R. H. Jacobson, Casper, WY <li><a href="abstracts/97-102.html"><b>AAS 97-102</b></a> -- <b>SHORT RESPONSE TIME OPTIONS FOR IMPENDING ASTEROID COLLISION ,</b> D. G. Tuckness, Jr. and T. McGaha, The University of Texas at Arlington <li><a href="abstracts/97-103.html"><b>AAS 97-103</b></a> -- <b>DYNAMICS AND CONTROL OF CLOSE ORBITS AROUND SMALL ROTATING BODIES ,</b> M. Guelman, Israel Institute of Technology <li><a href="abstracts/97-104.html"><b>AAS 97-104</b></a> -- <b> AUTONOMOUS CONTROL OF A RING OF SATELLITES ,</b> A. G. Y. Johnston and C. R. McInnes, University of Glasgow, United Kingdom <li><a href="abstracts/97-105.html"><b>AAS 97-105</b></a> -- <b> HALO ORBIT GENERATION USING THE CENTER MANIFOLD ,</b> M. W. Lo, Jet Propulsion Laboratory <li><a href="abstracts/97-106.html"><b>AAS 97-106</b></a> -- <b> LISSAJOUS ORBITS AROUND HALO ORBITS ,</b> G. Gmez and C. Sim, Universitat de Barcelona, Spain; J. Masdemont, Universitat Politcnica de Catalunya, Spain </ul> <dt><h3> SESSION 2 GLOBAL POSITIONING SYSTEM </h3> <h4> 8:30 AM Monday, February 10 Pathfinder </h4> <h4> Chair: DR. BOBBY G. WILLIAMS, Jet Propulsion Laboratory </h4> <ul> <li><a href="abstracts/97-107.html"><b>AAS 97-107</b></a> -- <b>GPS NAVIGATION INITIATIVES AT GODDARD SPACE FLIGHT CENTER FLIGHT DYNAMICS DIVISION ,</b> R. Hart and S. Truong, NASA Goddard Space Flight Center; A. Long, D. Oza and T. Lee, Computer Sciences Corporation <li><a href="abstracts/97-108.html"><b>AAS 97-108</b></a> -- <b>ORBEST-A GPS NAVIGATION SOLUTION ALGORITHM WITHOUT DOP ANALYSIS ,</b> R. V. F. Lopes and H. K. Kuga, INPE-Instituto Nacional de Pesquisas Espaciais, Brazil <li><a href="abstracts/97-109.html"><b>AAS 97-109</b></a> -- <b>G THE GPS NAVIGATION SOLUTION FOR ORBIT DETERMINATION ,</b> J. M. Nascimento, H. K. Kuga and A. F. B. A. Prado, INPE-Instituto Nacional de Espaciais, Brazil <li><a href="abstracts/97-110.html"><b>AAS 97-110</b></a> -- <b>ANALYSIS OF ALGEBRAIC SOLUTIONS TO THE GPS NAVIGATIONAL EQUATIONS ,</b> J. B. Lundberg, C. F. Minter and S. Yoon, Auburn University <li><a href="abstracts/97-111.html"><b>AAS 97-111</b></a> -- <b> SATELLITE ORBIT DETERMINATION USING GPS PSEUDORANGES UNDER SA ,</b> P. W. Binning, Naval Research Laboratory <li><a href="abstracts/97-112.html"><b>AAS 97-112</b></a> -- <b>77 GPS ATTITUDE AND NAVIGATION EXPERIMENT (GANE) ,</b> M. E. Lisano, McDonnell Douglas Aerospace; J. R. Carpenter, NASA Johnson Space Center </ul> <dt><h3> SESSION 3 ATTITUDE DYNAMICS </h3> <h4> 8:30 AM Monday, February 10 Discovery </h4> <h4> Chair: DR. ROBERT H. BISHOP, The University of Texas at Austin </h4> <ul> <li><a href="abstracts/97-114.html"><b>AAS 97-114</b></a> -- <b>DYNAMICS OF AN ASYMMETRIC SPACECRAFT BY A CONSTANT THRUST: PERTURBATION STUDIES ,</b> T. Williams and S. Tanygin, University of Cincinnati <li><a href="abstracts/97-115.html"><b>AAS 97-115</b></a> -- <b>EFFECTS OF EXHAUST GASES ON THE DYNAMICS OF SPINNING SPACE VEHICLES UNDERGOING MASS LOSS ,</b> F. O. Eke and J. Mudge, University of California-Davis <li><a href="abstracts/97-116.html"><b>AAS 97-116</b></a> -- <b>SOME STUDIES ON LINEARIZED UNCERTAINTY PROPAGATION IN RIGID BODY MOTION ,</b> J. L. Junkins and M. R. Akella, Texas A&M University <li><a href="abstracts/97-117.html"><b>AAS 97-117</b></a> -- <b>FURTHER INVESTIGATIONS OF THE ATTITUDE MOTIONS OF A VARIABLE MASS CYLINDER ,</b> T. C. Mao and F. O. Eke, University of California-Davis <li><a href="abstracts/97-118.html"><b>AAS 97-118</b></a> -- <b> THE DYNAMICS AND MODELING FIDELITY OF AN APPARATUS TO TEST THE STABILITY OF SPINNING SPACECRA,</b> D. M. Halsmer, Oral Roberts University <li><a href="abstracts/97-119.html"><b>AAS 97-119</b></a> -- <b> AN EIGENFACTOR SQUARE ROOT ALGORITHM FORMULATION FOR NONLINEAR DYNAMICS ,</b> J. L. Junkins and H. Schaub, Texas A&M University </ul> <dt><h3> SESSION 4 SATELLITE THEORY </h3> <h4> 1:30 PM Monday, February 10 Pathfinder </h4> <h4> Chair: DR. RON PROULX, Charles Stark Draper Laboratory </h4> <ul> <li><a href="abstracts/97-121.html"><b>AAS 97-121</b></a> -- <b>A FAMILY OF VARIABLE-STEP CHEBYSHEV METHODS FOR PRECISE INTEGRATION OF PERTURBED OSCILLATOR SY,</b> D. L. Richardson, University of Cincinnati; J. V. Aguiar, Universidad de Salamanca, Spain <li><a href="abstracts/97-122.html"><b>AAS 97-122</b></a> -- <b>SEMIANALYTICAL METHODS FOR HIGH ECCENTRIC ORBITS: ZONAL HARMONICS AND AIR DRAG TERMS ,</b> R. Barrio, Universidad de Zaragoza, Spain; J. Palacin, Universidad Pblica de Navarra, Spain <li><a href="abstracts/97-123.html"><b>AAS 97-123</b></a> -- <b>EAST-WEST STATIONKEEPING OF SATELLITE ORBITS WITH RESONANT TESSERAL HARMONICS ,</b> T. A. Ely and K. C. Howell, Purdue University <li><a href="abstracts/97-124.html"><b>AAS 97-124</b></a> -- <b>REDUCING THE GEOPOTENTIAL TESSERAL HARMONIC EFFECTS ON AUTONOMOUS LONGITUDE DRIFT CONTROL OF S,</b> V. Orlando and H. K. Kuga, INPE-Instituto Nacional de Pesquisas Espaciais, Brazil <li><a href="abstracts/97-125.html"><b>AAS 97-125</b></a> -- <b>ANALYTICAL THEORY FOR THE SPOT SATELLITE ,</b> J. Palacin and P. Yanguas, Universidad Pblica de Navarra, Spain; J. F. San Juan, Universidad de la Rioja, Spain <li><a href="abstracts/97-126.html"><b>AAS 97-126</b></a> -- <b>REGULARIZED EQUATIONS OF MOTION FOR THE ALFRIEND-COFFEY HAMILTONIAN ,</b> I. Aparicio and L. Flora, Universidad de Valladolid, Spain </ul> <dt><h3> SESSION 5 NAVIGATION/TRACKING/DEBRIS </h3> <h4> 1:30 PM Monday, February 10 Discovery </h4> <h4> Chair: DR. LINCOLN J. WOOD, Jet Propulsion Laboratory </h4> <ul> <li><a href="abstracts/97-128.html"><b>AAS 97-128</b></a> -- <b>NAVIGATION USING TWO ANGLE ONLY MEASUREMENTS TO DETERMINE POSITION OF LOW THRUST SPACECRAFT ,</b> S. W. Burkham, D. G. Tuckness, Jr. and T. McGaha, The University of Texas at Arlington <li><a href="abstracts/97-129.html"><b>AAS 97-129</b></a> -- <b>ADAPTIVE INTERPLANETARY NAVIGATION USING DIFFERENCED-RANGE OBSERVABLES: MARS PATHFINDER ,</b> W. S. Chaer and R. H. Bishop, The University of Texas at Austin <li><a href="abstracts/97-130.html"><b>AAS 97-130</b></a> -- <b>ON THE APPLICATION OF GRAVITY GRADIOMETER FOR INERTIAL NAVIGATION SYSTEM ,</b> H. Shingu, National Aerospace Laboratory, Japan <li><a href="abstracts/97-131.html"><b>AAS 97-131</b></a> -- <b>AN OVERALL TRAJECTORY AND PERFORMANCE ANALYSIS FOR A LONG- RANGE HYPERSONIC TRANSPORT USING EXO,</b> D. G. Tuckness, Jr. and T. McGaha, The University of Texas at Arlington <li><a href="abstracts/97-133.html"><b>AAS 97-133</b></a> -- <b>AN ESTIMATION OF HAZARDS IN THE SPACE ENVIRONMENT FOR A LONG-RANGE HYPERSONIC TRANSPORT USING ,</b> D. G. Tuckness, Jr. and T. McGaha, The University of Texas at Arlington <li><a href="abstracts/97-134.html"><b>AAS 97-134</b></a> -- <b>PREDICTIVE AVOIDANCE FOR GROUND-BASED LASING HAMILTONIAN ,</b> S. Alfano, U.S. Air Force Space Command; R. Burns, U.S. Air Force Phillips Laboratory <li><a href="abstracts/97-135.html"><b>AAS 97-135</b></a> -- <b>PREDICTING CRACK LENGTHS IN MULTI-WALL SYSTEMS FOLLOWING A PERFORATING HYPERVELOCITY PROJECTI,</b> W. P. Schonberg and E. Mohamed, University of Alabama in Huntsville </ul> <dt><h3> SESSION 6 MULTI-BODY DYNAMICS/TETHERED SYSTEMS </h3> <h4> 1:30 PM Monday, February 10 Enterprise </h4> <h4> Chair: DR. ARUN K. MISRA, McGill University </h4> <ul> <li><a href="abstracts/97-136.html"><b>AAS 97-136</b></a> -- <b>MULTIBODY MODELING OF COMMUNICATIONS SATELLITE DYNAMICS FOR GROUND-BASED SIMULATIONS ,</b> J. E. Cochran, Jr., Y-M Cheng, S. Cho and S. Yoon, Auburn University J. M. Kim, Electronics and Telecommunications Research Institute, Kor <li><a href="abstracts/97-137.html"><b>AAS 97-137</b></a> -- <b>COORDINATED MOTION CONTROL OF MULTIPLE MANIPULATOR SPACE FREE-FLYERS ,</b> S. A. A. Moosavian and E. Papadopoulos, McGill University, Canada <li><a href="abstracts/97-138.html"><b>AAS 97-138</b></a> -- <b>A NEW LOOK AT THE PROBLEM OF CONSTRAINTS VIOLATION ,</b> S. Djerassi, Haifa, Israel K. W. Buffinton, Bucknell University <li><a href="abstracts/97-139.html"><b>AAS 97-139</b></a> -- <b>SIMULTANEOUS DEPLOYMENT OF A CABLE FROM TWO MOVING PLATFORMS ,</b> S. Djerassi and H. Bamberger, Haifa, Israel <li><a href="abstracts/97-141.html"><b>AAS 97-141</b></a> -- <b>NON-LINEAR FREE VIBRATION OF A SPINNING TETHER ,</b> B. N. Min and A. K. Misra, McGill University, Canada </ul> <dt><h3> SESSION 7 TRAJECTORY DESIGN AND OPTIMIZATION </h3> <h4> 8:30 AM Tuesday, February 11 Enterprise </h4> <h4> Chair: MR. DENNIS V. BYRNES, Jet Propulsion Laboratory </h4> <ul> <li><a href="abstracts/97-146.html"><b>AAS 97-146</b></a> -- <b>NECESSARY CONDITIONS FOR THE OPTIMALITY OF SYNERGETIC MANEUVERS ,</b> S-Y Park and I. M. Ross, Naval Postgraduate School <li><a href="abstracts/97-149.html"><b>AAS 97-149</b></a> -- <b> DETERMINATION OF OPTIMAL SPACECRAFT TRAJECTORIES USING A STEP-BY-STEP LINEARIZATION METHOD ,</b> S. H. Pourtakdoust, M. A. Jalali and J. R. Saberian, Sharif University of Technology, Iran <li><a href="abstracts/97-160.html"><b>AAS 97-160</b></a> -- <b> OPTIMAL MANEUVER SEQUENCE FOR KOREASAT 1 RECOVERY ,</b> B. A. Conway and F. Chen, University of Illinois at Urbana-Champaign </ul> <dt><h3> SESSION 8 CONTROL THEORY </h3> <h4> 8:30 AM Tuesday, February 11 Pathfinder </h4> <h4> Chair: DR. DON MACKISON, Mackison Associates </h4> <ul> <li><a href="abstracts/97-150.html"><b>AAS 97-150</b></a> -- <b>CONDITIONS FOR CONVERGENCE IN INDIRECT ADAPTIVE CONTROL BASED LEARNING CONTROL ,</b> H. P. Wen and R. W. Longman, Columbia University <li><a href="abstracts/97-151.html"><b>AAS 97-151</b></a> -- <b>APPROXIMATE SOLUTION OF OPTIMAL CONTROL PROBLEMS ,</b> D. G. Hull, The University of Texas at Austin <li><a href="abstracts/97-152.html"><b>AAS 97-152</b></a> -- <b>USE OF DECOUPLING BASIS FUNCTIONS IN LEARNING CONTROL FOR LOCAL LEARNING AND FOR IMPROVED TRAN,</b> S.J. Oh and R. W. Longman, Columbia University <li><a href="abstracts/97-154.html"><b>AAS 97-154</b></a> -- <b> EXPERIMENTS IN THE USE OF LEARNING CONTROL CONCEPTS TO ELIMINATE ERROR IN CONSTANT VELOCITY B,</b> Y. Hsin and R. W. Longman, Columbia University; E. J. Solcz and J. de Jong, Xerox Ccorporation </ul> <dt><h3> SESSION 9 MISSION DESIGN - NEAR EARTH </h3> <h4> 1:30 PM Tuesday, February 11 Enterprise </h4> <h4> Chair: MR. LESTER L. SACKETT, Charles Stark Draper Laboratory </h4> <ul> <li><a href="abstracts/97-155.html"><b>AAS 97-155</b></a> -- <b>ON SATELLITE UMBRA/PENUMBRA ENTRY AND EXIT POSITIONS ,</b> B. Neta, Naval Postgraduate School; D. Vallado, U.S. Air Force Phillips Laboratory <li><a href="abstracts/97-156.html"><b>AAS 97-156</b></a> -- <b>EFFECT OF ORBITER-INDUCED PERTURBATIONS ON THE TRAJECTORY FROM A PAYLOAD PERSPECTIVE ,</b> A. F. Heaton, NASA Marshall Space Flight Center <li><a href="abstracts/97-161.html"><b>AAS 97-161</b></a> -- <b>SPACE SHUTTLE CONTINGENCY SUPPORT PLANNING BY THE GODDARD SPACE FLIGHT CENTER FLIGHT DYNAMICS ,</b> J. O. Cappellari, Jr., L. March, W. F. Forcey, D. P. Morgenstern, P. P. Powers, and M. P. Schwegmann, Computer Sciences Corporation; A. Sho </ul> <dt><h3> SESSION 10 ATTITUDE DETERMINATION AND CONTROL </h3> <h4> 1:30 PM Tuesday, February 11 Pathfinder </h4> <h4> Chair: DR. JOHN B. LUNDBERG, Auburn University </h4> <ul> <li><a href="abstracts/97-163.html"><b>AAS 97-163</b></a> -- <b>AERODYNAMIC STABILIZATION ANALYSIS FOR LEO SMALL SATELLITES ,</b> J-S Chern, Chung Shan Institute of Science and Technology, Taiwan, Republic of China <li><a href="abstracts/97-164.html"><b>AAS 97-164</b></a> -- <b>THE NEW SKY2000 MASTER CATALOG ,</b> J. R. Myers, C. B. Sande, and A. C. Miller, Computer Sciences Corporation; W. H. Warren, Jr., Hughes STX; D. A. Tracewell, NASA Goddard Spa <li><a href="abstracts/97-165.html"><b>AAS 97-165</b></a> -- <b>ATTITUDE DETERMINATION FOR SPIN STABILIZED SATELLITES FROM GPS INTERFEROMETRY ,</b> R. V. F. Lopes, S. M. Fabri and L. Do. O. Ferreira, INPE-Instituto Nacional de Pesquisas Espaciais, Brazil <li><a href="abstracts/97-166.html"><b>AAS 97-166</b></a> -- <b>STUDY ON OPTIMAL FILTERING FOR ATTITUDE DETERMINATION APPLIED TO THE MOON-SUN ATTITUDE SENSOR ,</b> F. Curti and D. Mortari, Universit degli Studi di Roma "La Sapienza", Italy <li><a href="abstracts/97-167.html"><b>AAS 97-167</b></a> -- <b>THE ESOQ-2 SINGLE-POINT ALGORITHM FOR FAST OPTIMAL SPACECRAFT ATTITUDE DETERMINATION ,</b> D. Mortari, Universit degli Studi di Roma "La Sapienza", Italy <li><a href="abstracts/97-168.html"><b>AAS 97-168</b></a> -- <b>AIRBORNE KINEMATIC ATTITUDE DETERMINATION USING GPS PHASE INTERFEROMETRY ,</b> T. Tsujii, National Aerospace Laboratory, Japan <li><a href="abstracts/97-169.html"><b>AAS 97-169</b></a> -- <b>PERFORMANCE ASSESSMENT OF THE MOON-SUN ATTITUDE SENSOR ,</b> G. Laneve and D. Mortari, Universit degli Studi di Roma "La Sapienza", Italy <li><a href="abstracts/97-170.html"><b>AAS 97-170</b></a> -- <b>LEQG AND GAME THEORETIC SATELLITE ATTITUDE CONTROL WITH MAGNETIC TORQUER ,</b> C-H Won, Electronics & Telecommunications Research Institute, Korea </ul> <dt><h3> SESSION 11 MISSION DESIGN - LUNAR AND INTERPLANETARY </h3> <h4> 8:30 AM Wednesday, February 12 Enterprise </h4> <h4> Chair: DR. LOUIS A. D'AMARIO, Jet Propulsion Laboratory </h4> <ul> <li><a href="abstracts/97-171.html"><b>AAS 97-171</b></a> -- <b>BALLISTIC CAPTURE LUNAR TRANSFER DETERMINATION FOR THE U.S. AIR FORCE ACADEMY BLUE MOON MISSIO,</b> E. Belbruno, Princeton University; R. Humble, U.S. Air Force Academy <li><a href="abstracts/97-172.html"><b>AAS 97-172</b></a> -- <b>LUNAR AND PLANETARY MISSIONS LAUNCHED FROM A GEOSYNCHRONOUS TRANSFER ORBIT ,</b> P. A. Penzo, Jet Propulsion Laboratory <li><a href="abstracts/97-173.html"><b>AAS 97-173</b></a> -- <b>MERCURY MISSION DESIGN USING SOLAR ELECTRIC PROPULSION SPACECRAFT ,</b> C. A. Kluever and M. Abu-Saymeh, University of Missouri-Columbia/Kansas City <li><a href="abstracts/97-174.html"><b>AAS 97-174</b></a> -- <b>TRAJECTORY DESIGN FOR A EUROPA ORBITER MISSION: A PLETHORA OF ASTRODYNAMIC CHALLENGES ,</b> T. Sweetster, J. Johannesen, J. Bell, P. A. Penzo, A. Wolf, S. Williams and S. Matousek, Jet Propulsion Laboratory <li><a href="abstracts/97-175.html"><b>AAS 97-175</b></a> -- <b> CONTOUR MISSION OVERVIEW AND TRAJECTORY DESIGN ,</b> R. W. Farquhar and D. Dunham, Johns Hopkins University; S-C Jen, Telos Corporation <li><a href="abstracts/97-176.html"><b>AAS 97-176</b></a> -- <b> THE CUSTOMIZATION OF SATELLITE TOOL KIT FOR USE ON THE NEAR MISSION ,</b> J. Woodburn, K. Williams and H. DeWitt, Analytical Graphics, Inc. <li><a href="abstracts/97-177.html"><b>AAS 97-177</b></a> -- <b> PRELIMINARY PLANS FOR A CLOSE ENCOUNTER WITH 253 MATHILDE ,</b> B. G. Williams, C. L. Helfrich, J. K. Miller, W. M. Owen, D. J. Scheeres, and D. K. Yeomans, Jet Propulsion Laboratory; D. W. Dunham, R. W. </ul> <dt><h3> SESSION 12 DYNAMICS AND CONTROL OF FLEXIBLE STRUCTURES </h3> <h4> 8:30 AM Wednesday, February 12 Pathfinder </h4> <h4> Chair: DR. PETER M. BAINUM, Howard University </h4> <ul> <li><a href="abstracts/97-178.html"><b>AAS 97-178</b></a> -- <b>THERMALLY-INDUCED ATTITUDE DYNAMICS OF A SPACECRAFT WITH A FLEXIBLE BOOM ,</b> J. D. Johnston and E. A. Thornton, University of Virginia <li><a href="abstracts/97-180.html"><b>AAS 97-180</b></a> -- <b>ON-OFF CONTROL TO DESPIN AND RETRIEVE A TETHERED ARTIFICIAL GRAVITY SPACECRAFT INCLUDING PASSI,</b> S. I. Saeed and J. D. Powell, Stanford University <li><a href="abstracts/97-182.html"><b>AAS 97-182</b></a> -- <b> NEAR OPTIMAL CONTROL FOR FLEXIBLE EXPENDABLE LAUNCH VEHICLES ,</b> Z. Tan and P. M. Bainum, Howard University <li><a href="abstracts/97-184.html"><b>AAS 97-184</b></a> -- <b> MINIMUM TIME TRANSLATION OF A FLEXIBLE BEAM USING PULSE REPSONSE BASED CONTROL-EXPERIMENTAL R,</b> R. Gonzalez-Lima, Escola Politcnica da Universidade de So Paulo, Brazil </ul> <dt><h3> SESSION 13 ORBITAL TRANSFERS </h3> <h4> 1:30 PM Wednesday, February 12 Enterprise </h4> <h4> Chair: DR. CRAIG. A. KLUEVER, University of Missouri-Columbia/Kansas City </h4> <ul> <li><a href="abstracts/97-185.html"><b>AAS 97-185</b></a> -- <b>GENERAL FORM OF THE SPACECRAFT TERMINAL RENDEZVOUS EQUATIONS AND STATE TRANSITION MATRIX ,</b> T. E. Carter, Eastern Connecticut State University <li><a href="abstracts/97-186.html"><b>AAS 97-186</b></a> -- <b>BEST FORMS OF SOLUTION OF THE TSCHAUNER-HEMPEL DIFFERENTIAL EQUATIONS ,</b> T. E. Carter, Eastern Connecticut State University </ul> <dt><h3> SESSION 14 ORBIT DETERMINATION AND FILTERING THEORY </h3> <h4> 1:30 PM Wednesday, February 12 Pathfinder </h4> <h4> Chair: MR. JAY MIDDOUR, Naval Research Laboratory </h4> <ul> <li><a href="abstracts/97-192.html"><b>AAS 97-192</b></a> -- <b>PERFORMANCE OF TOPEX/POSEIDON "QUICK-LOOK" PRECISION ORBIT DETERMINATION IN THE EXTENDED MISSI,</b> A. Salama, B. Kennedy, J. Guinn and B. G. Williams, Jet Propulsion Laboratory <li><a href="abstracts/97-194.html"><b>AAS 97-194</b></a> -- <b>FEEDBACK TIME-OPTIMAL CONTROL SYNTHESIS FOR FLEXIBLE STRUCTURES WITH DAMPING ,</b> B. A. AL-Bassam and D. J. Mook, State University of New York at Buffalo <li><a href="abstracts/97-195.html"><b>AAS 97-195</b></a> -- <b>POSSIBILITY OF ILL-CONDITIONED COVARIANCE PROPAGATION IN THE TWO-STEP ESTIMATOR ,</b> J. L. Garrison and P. Axelrad, University of Colorado <li><a href="abstracts/97-196.html"><b>AAS 97-196</b></a> -- <b>A MODIFIED DETECTION FILTER FOR SENSOR FAULTS ,</b> A. F. de Mello, Acos Especiais Itabira S. A.-ACESITA, Brazil; M. L. O. Souza, INPE-Instituto Nacional de Pesquisas Espaciais, Brazil </ul> </dl> </html>