6,761 to 6,770 of 6,800 Results
Jul 30, 2001
Dellnitz, Michael; Junge, Oliver; Lo, Martin; Thiere, Bianca, 2001, "On the detection of energetically efficient trajectories for spacecraft", https://hdl.handle.net/2014/40517, AAS/AIAA Astrodynamics Specialists Conference, Quebec City, Canada, July 30 - August 2, 2001, JPL Open Repository
We propose a new method for the detection of energy-efficient trajectories for spacecraft. Via a so called target-shooting approach a pseudo-orbit between the relevant points in space is constructed in a simple model of the problem. This approximate trajectory is meant to serve a... |
Jul 16, 2001
Selva, L. E.; Wallace, R. E., 2001, "Observations on ion track structure in semiconductors : a phenomenological study", https://hdl.handle.net/2014/39444, IEEE Nuclear and Space Radiation Effects Conference, Vancouver, British Columbia, July 16-20, 2001., JPL Open Repository
An ion track structure model at the nanometer scale is presented. The model is based on electrostatic principles and is supported by observed experimental results conducted on power MOSFETs. The model predicts the existence of a transient induced electric field following the pass... |
Jul 8, 2001
Im, Eastwood; Durden, Stephen L.; Li, Fuk K.; Wu, Chialin; Haddad, Ziad S., 2001, "CloudSat radar instrument design and development status", https://hdl.handle.net/2014/40394, 23rd IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Sydney Australia, July 9-13, 2001, JPL Open Repository
The Cloud Profiling Radar is the key science instrument for the CloudSat Mission to acquire a global data set of vertical atmospheric cloud structure and its variability. CPR is a 94 GHz nadir-looking radar that measures the power backscattered by clouds as a function of distance... |
Jul 1, 2001
Spiers, Gary D., 2001, "Space based lidar shot pattern targeting strategies for small targets such as streams", https://hdl.handle.net/2014/39443, UNKNOWN, JPL Open Repository
An analysis of the effectiveness of four different types of lidar shot distribution is conducted to determine which is best for concentrating shots in a given location. A simple preemptive targeting strategy is found to work as adequately as a more involved dynamic strategy for m... |
Jun 28, 2001
Birur, G. C., 2001, "Mars Pathfinder mechanically pumped cooling loop", https://hdl.handle.net/2014/13633, Pasadena, CA, USA, JPL Open Repository
A mechanically pumped single-phase cooling loop was successfully flown on the Mars Pathfinder (MPF) Spacecraft which safely landed on the Martian surface on July 4, 1997. One of the key technologies that enabled the mission to succeed was an active heat rejection system (HRS) use... |
Jun 18, 2001
Jones, Jack A., 2001, "Inflatable robotics for planetary applications.", https://hdl.handle.net/2014/39004, 6th International Symposium on Artificial Intelligence, Robotics & Automation in Space : A New Space Odyssey, Montreal, Canada, June 18, 2001., JPL Open Repository
Space Inflatable vehicles have been finding popularity in recent years for applications as varied as spacecraft antennas, space-based telescopes, solar sails, and manned habitats [1]. Another branch of space inflatable technology has also considered developing ambient gasfilled,... |
May 9, 2001
Suchman, Jason; Salinas, Yuki; Kubo, Holly, 2001, "MIRO calibration switch mechanism", https://hdl.handle.net/2014/39448, Aerospace Mechanisms Symposium (AMS), Mountain View, California, May 9-11, 2001., JPL Open Repository
The Jet Propulsion Laboratory has design, analyzed, built, and tested a calibration switch mechanism for the MIRO instrument on the ROSETTA spacecraft. MIRO is the Microwave Instrument for the Rosetta Orbiter; this instrument hopes to investigate the origin of the solar system by... |
Apr 24, 2001
Smith, Benjamin D.; Engelhardt, Barbara E.; Mutz, Darren H., 2001, "Reducing costs of the modified Antarctic Mapping mission through automated planning", https://hdl.handle.net/2014/39449, 4th International Symposium on Reducing the Cost of Spacecraft Ground Systems and Operations, Laurel, Maryland, April 24, 2001, JPL Open Repository
This paper describes the automated mission planning system for MAMM, which dramatically reduced mission-planning costs to just a few workweeks, and enabled rapid generation of “what-if’ scenarios for evaluating mission-design trades. This latter capability informed several critic... |
Apr 17, 2001
Shanibayati, Shervin; Kinman, Peter; Tadjpour, Layla, 2001, "Turbo code carrier synchronization losses (Radio Losses)", https://hdl.handle.net/2014/39494, 19th AIAA Interanational Communications Satellite Systems Conference, Toulouse, France, April 17, 2001., JPL Open Repository
In this paper the radio loss results for (8920,1/3), (8920,1/6), (1783,1/3) and (1784,1/6) codes are presented. These radio losses were calculated through simulations for a range of data rates. These simulations included both suppressed carrier modulation and residual carrier mod... |
Apr 17, 2001
Shambayati, Shervin, 2001, "The "Brick Wall" radio loss approximation and the performance of strong channel codes for deep space applications at high data rates.", https://hdl.handle.net/2014/39447, 19th AIAA Interanational Communications Satellite Systems Conference, Toulouse, France, April 17, 2001., JPL Open Repository
In order to evaluate performance of strong channel codes in presence of imperfect carrier phase tracking for residual carrier BPSK modulation in this paper an approximate “brick wall” model is developed which is independent of the channel code type for high data rates. It is show... |
