IEEE Transactions on Geoscience and Remote Sensing

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Pioneer Venus Sounder And Small Probes Nephelometer Instrument

Boris Ragent, Thomas Wong, Jacques E. Blamont, Alan J. Eskovitz, more

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > 111 - 117

The Nephelometer instrument flown on all four of the probes of the Pioneer Venus mission is described. The instruments functioned well, returning data on the backscattering properties of the Venusian clouds and ambient solar radiation in several wavelength intervals as a function of altitude at four widely separated planetary locations. The design considerations, instrument construction, calibration...

article

Information for Authors

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > [131]-d

article

Pioneer Venus Small Probes Net Flux Radiometer Experiment

L. A. Sromovsky, H. E. Revercomb, Verner E. Suomi

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > 117 - 122

The University of Wisconsin net flux experiment on the Pioneer Venus mission investigated the distribution of radiative energy deposition and loss which drives atmospheric circulation on Venus. The instrument used an external sensor and a novel method of chopping to measure the net flux of solar and planetary radiation during descent through the thick Venus atmosphere. The sensor, consisting of a...

article

Research, Design And Development Engineers: Reduce Your Literature-Searching Time by up to 80%

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > [131]-b

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Pioneer Venus Multiprobe Entry Telemetry Recovery

R. B. Miller, R. Ramos

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > 15 - 19

The Entry Phase of the Pioneer Venus Multiprobe Mission involved data transmission over only a two-hour span. The criticality of recovery of those two hours of data, coupled with the fact that there were no radio signals from the Probes until their arrival at Venus, dictated unique telemetry recovery approaches on the ground. The result was double redundancy, use of spectrum analyzers to aid in rapid...

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Pioneer Venus Occultation Radio Science Data Generation

A. L. Berman, R. Ramos

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > 11 - 14

Previous to the Pioneer Venus Orbiter mission, occultation radio science data were generated at the Deep Space Stations of NASA's Deep Space Network via the analog recording of the baseband frequency output signal of a relatively wide bandwidth open-loop receiver. Signal digitization was a separate and subsequent operation at the Jet Propulsion Laboratory. During Pioneer Venus Orbiter radio science...

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Bennett Ion Mass Spectrometers on the Pioneer Venus Bus And Orbiter

H. A. Taylor, H. C. Brinton, T. C. G. Wagner, B. H. Blackwell, more

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > 44 - 49

Identical Bennett radio frequency ion mass spectrometer instruments on the Pioneer Venus Bus and Orbiter have provided the first in-situ measurements of the detailed composition of the planet's ionosphere. The sensitivity, resolution, and dynamic range are sufficient to provide measurements of the solar-wind-induced bow-shock, the ionopause, and highly structured distributions of up to 16 thermal...

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Design And Operation of the Pioneer Venus Orbiter Ultraviolet Spectrometer

A. I. F. Stewart

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > 65 - 70

The University of Colorado's Ultraviolet Spectrometer instrument carried on the Pioneer Venus Orbiter spacecraft is a 125 mm f/5 Ebert-Fastie design with a 250-mm Cassegrainian telescope. The instrument has extensive logic to control the grating motor drive and to adapt the basic spectrometer to the constraints and opportunities of the mission. Success has been achieved in reconciling the confficting...

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The Pioneer Venus Orbiter Gamma Burst Detector

R. W. Klebesadel, W. D. Evans, J. P. Glore, R. E. Spalding, more

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > 76 - 80

The Orbiter Gamma Burst Detector was designed to record the temporal and spectral characteristics of cosmic gamma-ray bursts. The primary mission of the experiment is the accurate determination of the directions to the sources of such bursts through a technique of triangulation, as a member of a widely spaced array of similar instruments. The system consists of a pair of scintillation spectrometers...

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The Infrared Radiometer on the Sounder Probe of the Pioneer Venus Mission

Robert W. Boese, Richard J. Twarowski, Jerry Gilland, Ralph E. Hassig, more

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > 97 - 100

The functional aspects of the Large Probe Infrared Radiometer Instrument are presented taking into account the experiment's objective and the mission's constraints. The optical elements, including the detectors, are described and a brief review of the instrument's calibration is given.

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Pioneer Venus Unified Abstract Data Library And Quick Look Data Delivery System

John A. Ferandin, Cindy L. Weeks, Raylene D. Pak

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > 19 - 27

Development of the Pioneer Venus (PV) Unified Abstract Data System (UADS) and Quick Look Data System (QLDS) was prompted by the need to provide PV investigators rapid and easy access to PV mission data. The UADS is intended to maximize the scientific benefits of the mission by facilitating the exchange of reduced scientific data. QLDS provides a method by which sampled daily mission data is rapidly...

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Pioneer Venus Spacecraft Design And Operation

George J. Nothwang

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > 5 - 10

The Pioneer Venus Orbiter and Multiprobe spacecraft design and operation enabled both remote and in-situ measurements of the Venusian environment from the outermost fringes of the atmosphere all the way to the surface. Both spacecraft were spin-stabilized and solar-cell powered from launch to Venus. Since orbit insertion, the Orbiter has been transmitting measurements from a highly elliptical 24-h...

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The Pioneer Venus Bus Neutral Gas Mass Spectrometer

H.-J. Hoffmann, K. Pelka, U. Von Zahn, D. Krankowsky, more

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > 122 - 126

The neutral gas mass spectrometer aboard the Pioneer Venus Multiprobe Bus employs a semi-open ion source with electron impact ionization of the ambient gas, a double-focusing mass analyzer with Mattauch-Herzog geometry, and two direct current electrometers as well as two counting multipliers for ion detection. The mass per charge range is 1 to 46 amu/e, and the mean sampling speed is 10 mass peaks/s...

article

Data Acquisition for Measuring the Wind on Venus from Pioneer Venus

J. R. Smith, R. Ramos

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > 126 - 130

The Pioneer Venus Differential Long Baseline Interferometry experiment was designed to measure the motion in three dimensions of the Pioneer probes during their fall to the surface of Venus, using a combination of Doppler and long baseline ratio interferometric methods. The altitude profies of wind speed and direction that may be deduced from these data are expected to contribute significantly to...

article

Pioneer Venus Orbiter Planar Retarding Potential Analyzer Plasma Experiment

William C. Knudsen, Karl Spenner, Jack Bakke, Vit Novak

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > 54 - 59

The retarding potential analyzer (RPA) on the Pioneer Venus Orbiter Mission measures most of the thermal plasma parameters within and near the Venusian ionosphere. Parameters include total ion concentration, concentrations of the more abundant ions, ion temperatures, ion drift velocity, electron temperature, and low-energy (0-50 eV) electron distribution function. Several functions not previously...

article

IEEE Standard Dictionary of Electrical And Electronics Terms

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > [131]-c

article

Atmosphere Structure Instruments on the Four Pioneer Venus Entry Probes

Alvin Seiff, David W. Juergens, Joseph E. Lepetich

IEEE Transactions on Geoscience and Remote Sensing > 1980 > GE-18 > 1 > 105 - 111

Measurements of temperature, pressure, and deceleration during descent, and of deceleration during high speed entry of the tour Pioneer Venus entry probes were used to define the structure, and differences in structure of the atmosphere of Venus at the four widely separated entry sites. This paper describes the sensors and steps taken to realize highly accurate measurements in the design and selection...

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INFONA - science communication portal

IEEE Transactions on Geoscience and Remote Sensing

Pioneer Venus Sounder And Small Probes Nephelometer Instrument

Information for Authors

Pioneer Venus Small Probes Net Flux Radiometer Experiment

Research, Design And Development Engineers: Reduce Your Literature-Searching Time by up to 80%

Pioneer Venus Multiprobe Entry Telemetry Recovery

Pioneer Venus Occultation Radio Science Data Generation

Bennett Ion Mass Spectrometers on the Pioneer Venus Bus And Orbiter

Design And Operation of the Pioneer Venus Orbiter Ultraviolet Spectrometer

The Pioneer Venus Orbiter Gamma Burst Detector

The Infrared Radiometer on the Sounder Probe of the Pioneer Venus Mission

Pioneer Venus Unified Abstract Data Library And Quick Look Data Delivery System

Pioneer Venus Spacecraft Design And Operation

The Pioneer Venus Bus Neutral Gas Mass Spectrometer

Data Acquisition for Measuring the Wind on Venus from Pioneer Venus

Pioneer Venus Orbiter Planar Retarding Potential Analyzer Plasma Experiment

IEEE Standard Dictionary of Electrical And Electronics Terms

Atmosphere Structure Instruments on the Four Pioneer Venus Entry Probes

IEEE Copyright Form

IEEE Geoscience And Remote Sensing Society

Pioneer Venus Overview

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