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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 271 records · Page 15
All sourcesNASA NTRSDOE OSTI
NASA NTRS1995

JPL Planetary Gravity Efforts and Techniques

The Magellan spacecraft has provided the highest resolution global gravity data set from spacecraft measurements. The X-band Doppler tracking is sensitive to harmonic degree of 120 or greater. We have developed a 75th degree and order global spherical harmonic model using a spatial constraint instead of the usual method. Results are presented for JPL Venus and Mars gravity field determination efforts and efforts are reviewed for developing higher degree models on supercomputers.

gravity fields Doppler tracking Magellan↗
NASA NTRS1995

JPL's Galileo Spacecraft Will Shoot an Interplanetary 'Bulls's Eye'

JPL's Galileo spacecraft, with a December 1995 rendezvous with Jupiter, shot an interplanetary 'bull's eye' when it released its probe to conduct history's first sampling of Jupiter's atmosphere. The probe will slam into Jupiter's hydrogen-helium atmosphere at 100,000 mph as the spacecraft flies overhead and receives and records the probe's data on the structure and composition of the atmosphere.

Galileo Jupiter Interplanetary Spacecraft↗
NASA NTRS1995

JPL CMOS Active Pixel Sensor Technology

This paper will present the JPL-developed complementary metal- oxide-semiconductor (CMOS) active pixel sensor (APS) technology. The CMOS APS has achieved performance comparable to charge coupled devices, yet features ultra low power operation, random access readout, on-chip timing and control, and on-chip analog to digital conversion. Previously published open literature will be reviewed.

Space Microelectronics Image Sensors APS Digital I↗
NASA NTRS1993

GPS Global Tracking Network Operations At JPL During the 1992 IGS Experiment and Beyond

The GPS Network Operations center at JPL Provides resources for the collection, distribution and maintenance of GPS data from global network of GPS receivers. This includes the ability to remotely diagnosis receiver problems, communicate with receivers and operators of receivers, to automatically collect, process and distribute data for 14 stations in the IGS network. This amounts to 35 megabytes of raw, finished data and products daily.

GPS receiver Global Network↗
NASA NTRS1993

The JPL Microdevices Laboratory: Capabilities and Access

The Microdevices Laboratory (MDL) at JPL is a world-class microdevice and microinstrument research and advanced development center. It houses processing facilities for end-to-end device fabrication based on Si, GaAs, and superconductors down to 0.1 (micro)m feature size. MDL's charter is to develop and demonstrate new microdevice technologies, and to transfer these technologies to NASA users and to industry. In full operation since 1990, MDL has demonstrated rapid prototyping of several new microdevices and technologies.

microdevices microtechnology fabrication prototypi↗
NASA NTRS1993

Land Mobile Satellite Antenna Development at JPL

JPL has developed several mobile-vehicular antenna systems for satellite service throughout the last decade. The frequency bands cover UHF through Ka-band, and the antennas vary from high-gain with automatic satellite-tracking to omni-directional.

Mobile Satellite Antenna↗
NASA NTRS2001

An overview of MEMS-based micropropulsion development at JPL

Development of MEMS (Microelectromechanical Systems) micropropulsion at the Jet Propulsion Laboratory (JPL) is reviewed. This includes a vaporizing liquid micro-thruster for microspacecraft attitude control, a micro-ion emgine for microspacecraft primary propulsion or large spacecraft fine attitude control, as well as several valve studies, including a solenoid valve studied in collaboration with Moog Space Products Division, and a piezoelectric micro-valve.

MEMS micropropulsion↗
NASA NTRS2005

Electric propulsion for JPL missions

Since the success of the DS1 mission, electric propulsion (EP) has moved from the laboratory to application on many present and proposed JPL missions.

ion thrusters↗