| Studies of Techniques for Measuring Spaceborne Gaseous Contaminants and Particulates in the Near Field |
18 MAY 89 |
66 pages |
| Authors:
G. E. Galica; S. A. Rappaport; W. P. Reidy; O. Shepherd; VISIDYNE INC BURLINGTON MA
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 | This report outlines techniques for monitoring the water vapor and particulate contamination in the vicinity of a spacecraft. The water vapor concentration is measured by first dissociating the water vapor with VUV radiation from a krypton flashlamp and then monitoring the intensity of the chemiluminescence from the dissociation products. The particle properties are measured by illuminating particles in field of view of an imaging detector with visible radiation from a ... |
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| Anticipated Signal Levels for the ESA and RPA |
24 JAN 89 |
17 pages |
| Authors:
W. P. Reidy; R. J. Rieder; VISIDYNE INC BURLINGTON MA
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| The accelerator module is equipped with four electron guns and several detectors to monitor the electron beam produced by the guns. The guns will produce a nominal 3 keV, 40 ampere electron beam. For the beam to propagate, the return current must equal the beam current. There is no detailed model for the EXCEDE III return current, therefore, for these calculations the current is assumed to distribute itself isotropically and ... |
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| Excede III Instrumentation Counting Rates |
29 APR 88 |
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| Authors:
R. J. Rieder; M. A. Kerr; M. E. LePage; S. A. Rappaport; W. P. Reidy; VISIDYNE INC BURLINGTON MA
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 | Signal levels for levels for instrumentation on the EXCEDE III experimental payload have been calculated. Models for the production of visible and UV radiation are developed and count rates for the scanning and fixed photometers, UV and Visible, Spectrometers, and x-ray detecting are evaluated. Scanning photometer, Fixed Photometer, Visible spectrometer, X Ray detector, Ultraviolet radiation. (mjm) |
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| BAMM II Flight, 30 April 1982, Engineering Evaluation Report |
01 JUL 1982 |
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| Authors:
R. W. Brooke; O. Shepherd; W. P. Reidy; VISIDYNE INC BURLINGTON MA
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| The objectives of the BAMM II flight of 30 Apr 1982 were as follows: Infrared earth/atmosphere background at sunrise and low angle solar specular reflections; Infrared earth background - snow fields; and Infrared earth background - mountains. Data was obtained from three types of scenes. However, due to a command system malfunction, the number of scene measurements was reduced. During the flight, the command link was subjected to frequent intermittent ... |
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| Background Optical Suppression System (BOSS), |
10 OCT 1979 |
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| Authors:
O. Shepherd ; T. F. Zehnpfennig ; Saul Rappaport ; W. P. Reidy; VISIDYNE INC BURLINGTON MASS
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| A background optical suppression scheme utilizing a double-beam interferometer-spectrometer with coaligned beams and tailored modulation, transfer functions is presented. The system is designed to enhance the detectability of localized sources in the presence of strong spatially structured background in the IR region of the spectrum. The principles of the double-beam interferometer, several different schemes for tailoring the system MTF, and the results of calculations of the signal-to-noise for a variety ... |
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| Evaluation and Development of Advanced High Altitude Experiments and Systems. |
01 DEC 1978 |
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| Authors:
J. W. Carpenter; C. Humphrey; A. Hurd; W. P. Reidy; O. Shepherd; VISIDYNE INC BURLINGTON MASS
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| This report covers development of advanced HAES experiments and related optical codes, development of rocketborne UV and visible spectrometers and particle analyzers, and evaluation and testing of Advanced Energy Deposition Systems (AEDS). (Author) |
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| Tailored Modulation Transfer Function and the Application to Dual Beam Interferometry, |
27 MAR 1978 |
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| Authors:
T. F. Zehnpfennig; S. Rappaport; W. P. Reidy; O. Shepherd; VISIDYNE INC BURLINGTON MASS
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| A technique for background suppression for use in Dual Beam Interferometers and other imaging systems is described. Background suppression is achieved by using pairs of optical systems whose modulation transfer functions match at low spatial frequencies but not at the higher frequencies which characterize a target. Various pairs of systems are discussed, and signal-to-RMS-clutter-leakages are calculated. (Author) |
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| IR Background Suppression Studies, |
15 MAY 1977 |
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| Authors:
O. Shepherd; W. P. Reidy; T. F. Zehnpfennig; G. A. Vanasse; A. T. Stair Jr; VISIDYNE INC BURLINGTON MASS
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| A brief description of the background suppression scheme is described, and results obtained using the defocussing technique are presented. It has been demonstrated that a background suppression ratio of two orders of magnitudes can be obtained. |
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| Comparison of ICECAP and EXCEDE Rocket Measurements with Computer Code Predictions. |
15 FEB 1977 |
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| Authors:
A. G. Hurd; J. W. Carpenter; T. C. Degges; W. F. Grieder; W. P. Reidy; VISIDYNE INC BURLINGTON MASS
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| An analysis is made of rocketborne HAES experiments performed as part of the ICECAP and EXCEDE II test programs. The results are compared to atmospheric emissions from code modelling. Relationships between auroral electron spectra and visible aurora have been determined. Sources of auroral IR are explained. (Author) |
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| Analysis of High Altitude Effects Simulation (HAES). |
01 FEB 1976 |
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| Authors:
W. P. Reidy; T. C. Degges; W. Neal; VISIDYNE INC BURLINGTON MASS
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| Initial formulation of the analysis of the energy deposition and the electron density profiles in an EXCEDE-type experiment are presented. Altitude profiles are given for the night time zenith spectral radiance for CO2 bands at 4.3 micrometers and 15 micrometers and for the ozone band at 9.6 micrometers. Model calculations of the vibrational population of the first excited level of the CO2 nu sub 3 vibrational mode are also presented. ... |
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| The Design and Flight Test of a 30 kw Rocket-Borne Electron Accelerator Module (EXCEDE II Test) HAES Report Number 22. |
15 JUL 1975 |
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| Authors:
O. Shepherd; J. W. Carpenter; W. P. Reidy; W. A. Sheehan; T. F. Zehnpfennig; VISIDYNE INC BURLINGTON MASS
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| A 30 kw, 3 kV rocket-borne electron accelerator was designed, fabricated, tested and launched from the Poker Flat Research Range as part of the EXCEDE Program. Additional rocket-borne and ground instrumentation provided diagnostic information to evaluate accelerator performance. The high voltage power supply and electron guns were designed specifically for high power deposition. This engineering test demonstrated the accelerator met its design criterion. |
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| Design and Construction of a Small 5X Stereoscopic Rear Projection Viewer. |
MAY 1974 |
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| Authors:
T. F. Zehnpfennig; J. M. Berrigan; W. P. Reidy; VISIDYNE INC BURLINGTON MASS
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| This prototype rear projection viewer allows screening of stereoscopic reconnaissance imagery from the same light table used for detailed analysis functions. It incorporates a unique multiple reflection optical design using front surface mirrors and a beamsplitter to fold the optical path into an unusually compact overall package. (Author) |
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| RESEARCH DIRECTED TOWARD MEASUREMENT OF THE ENERGETIC CHARGED PARTICLE ENVIRONMENT IN NEAR-EARTH SPACE. |
01 SEP 1967 |
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| Authors:
W. C. Hadley; F. R. Paolini; W. P. Reidy; P. R. Ruby; AMERICAN SCIENCE AND ENGINEERING INC CAMBRIDGE MASS
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| Instruments for OV2-1, OV2-3, and OV3-1 satellites were modified, refurbished, retested, and recalibrated. Field assistance was provided at systems test, integration, and launch of the above satellites and of three instrument packages for Astrobee vehicles. Engineering evaluation was carried out where successful launch permitted. Satellites OV2-1 and OV2-3 failed to achieve orbit, but OV3-1 was successfully placed in orbit on 22 April 1966. The instruments on this satellite measure protons ... |
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| MEASUREMENTS OF LOW ENERGY ELECTRON PRECIPITATIONS ASSOCIATED WITH AURORAL DISTURBANCES AND TRAPPED RADIATION BELTS. |
12 NOV 1965 |
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| Authors:
W. P. Reidy; G. F. Sinnamon; P. R. Ruby; AMERICAN SCIENCE AND ENGINEERING INC CAMBRIDGE MASS
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| An electrostatic analyzer designed to detect the spectrum and angular distribution of electrons in the regions explored by a high elliptical orbiting satellite is described. Details of the instrument's operation and calibration are given, along with its integration into the satellite. Integration of an instrument payload into the Astrobee 200 rocket system is described. Aerobee flights of three electronic analyzers into an aurora are described, and the data from these ... |
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| ROCKET-BORNE INSTRUMENTATION TO MEASURE THE RATE OF IONIZATION AND RELATED PHENOMENA DURING AN AURORA. |
15 JUN 1964 |
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| Authors:
W. P. Reidy; G. Davidson; R. GIACCONI; O. Shepherd; R. Smith; AMERICAN SCIENCE AND ENGINEERING INC CAMBRIDGE MASS
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| The scientific objectives of the experiments and the individual instruments flown on the Astrobee 200 sounding rocket AC 15.610 are discussed in detail. The rocket was instrumented for auroral studies and was launched from Fort Churchill, Manitoba, Canada on 8 December 1963. The instrumentation included a new detector to measure the rate of ion production during periods of abnormally large ionization and other detectors to measure such related phenomenon as ... |
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