Performance of a Low-Noise 600 GHz - 635 GHz SIS Receiver at the Caltech Submillimeter Observatory (Hawaii)
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rotational transitions molecular transitions SIS h↗
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Results for “Receivers”
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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Design and Implementation of a TMS320C25-Based Hybrid Digital Phase-Locked Loop --An Application to Transponder Receiver Breadboard
The experimental study of a Phase-Locked Loop (PLL) with a digital loop filter is presented in this paper.
Phase-locked loop pll digital loop filter digital ↗
Use of GPS Tracking Data from Low Earth Flight Receiver to Determine Geocenter Location
Geocentric Tracking Station coordinates can be measured with global positioning system.
earth's center of mass geocenter GPS tracking data↗
Effects of the Interfering Harmonics Caused by Imperfect Data Streams on BPSK and QPSK Receivers
One of the most pernicious cause for spurious emission and performance degradation in space telemetry systems is the imperfect data stream at the input of the modulator. The imperfection of the data stream can be caused by impalance between -1s and +1s (unbalanced data) and/or by data asymmetry.
NRZ data stream space telemetry bands spurious emi↗
GPS Instrument Development at JPL; Current and Future Receiver Concepts for High Accurasy Measurements
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Global Positioning System↗
A Look at a Day of Data from The TOPEX/POSEIDON GPS Receiver
Launched on 10 August, 1992, the Topex/Poseidon satellite is a joint project of NASA and the French space agency CNES. The purpose of this Earth orbiting altimetric satellite (for brevity, referred to as Topex) is to enable monitoring of the ocean topography to higher levels of accuracy than previously achieved. Essential to obtaining this greater level of accuracy is the use of improved navigational systems which can yield position estimates for Topex good to a few centimeters. One of the navigational systems utilized by Topex is the Global Positioning System (GPS) -- a network of navigational beacons that has become widely used in many areas beside spacecraft navigation...
Jee, J. Rodney↗
Advanced Monolithic X-Band GaAs MMIC Receiver - Design and Reliability Issures in Medium Scale Integration
Advanced transponder development ofjective. Develop and evaluate MMIC technology for advanced X-band and Ka-band transponders to reduce demand on spacec raft resources.
deep space spacecraft↗
A Look at a Day of Data from the Topex/Poseidon GPS Receiver
Launched on August 10, 1992, the Topex/Poseidon satellite is a joint project of NASA and the French space agency CNES. The pupose of this Earth orbiting altimetric satellite (for brevity, referred to as Topex) is to enable monitoring of the ocean topography to higher levels of accuracy than previously achieved.
robust regression spline graphics↗
Ionospheric scintillation measured using GPS receivers during the solar maximum in 2000
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ionospheric scintillation GPS solar maximum↗
Optical array receivers for deep-space communication
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deep-space communication↗
Study of critical technology items for an advanced Earth orbiting atmospheric chemistry/climate observatory using cryogenic mm/submm receivers
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microwave climate atmosphere radiometer SIS HEB cr↗
A Novel Approach to Atmospheric Profiling with a Down-Looking Mountain-Based or Air-Borne GPS Receiver
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Occultation Atmospheric Science GPS↗
A Novel Approach to Atmospheric Profiling with a Mountain-Based or Air-Borne GPS Receiver
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Occultation Water Vapor Profiling Atmospheric refr↗
Strategies for Near Real Time Estimates of Precipitable Water Vapor from GPS Ground Receivers
GPS-based estimates of precipitable water vapor (PWV) may be useful in numerical weather models to improve short-term weather predictions. To be effective in numerical weather prediction models, GPS PWV estimates must be produced with sufficient accuracy in near real time. Several estimation strategies for the near real time processing of GPS data are investigated.
GPS↗
The Behavior of PCM/PM Receivers in Non-Ideal Channels, Part I: The Separate Effects
The performance of residual carrier communication systems that are used for space telemetry signals and that employ a PCM/PM modulation technique with an imperfect NRZ or Bi-0 data format and band-limited channels is investigated in this paper.
InterSymbol Interference↗
The Behavior of PCM/PM Receivers in Non-Ideal Channels
This paper presents a performance evaluation of residual carrier commuication systems that employ a PCM/PM modulation technique operating over non-ideal channels. The non-ideal channels under investigation include data asymmetry, an unbalanced data stream (i.e., transition density deviates from 0.5) and InterSymbol Interference (ISI).
InterSymbol Interference↗
Deep Space Network capabilities for receiving weak probe signals
This paper will describe the capability and highlight the cases of the critical communications for the Mars rovers and Saturn Orbit Insertion and preparation radio tracking of the Huygens probe at (non-DSN) radio telescopes.
signals↗
Radio science receiver support of the Mars Exploration Rover landings
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RSR↗