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Computer-controlled sampling system for airborne particulates

Description: A self-contained, mobile, computer-controlled air-sampling system has been designed and fabricated that also collects and records the data from eight meteorological sensors. The air-samplers are activated automatically when the collected meteorological data meet the criteria specified at the beginning of the data-collection run. The filters from the samplers are intended to collect airborne $sup 239$Pu for later radionuclide analysis and correlation with the meteorological data for the study of… more
Date: August 14, 1975
Creator: Hall, C. F.; Anspaugh, L. R.; Koval, J. S.; Phelps, P. L. & Steinhaus, R. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optical timing receiver for the NASA laser ranging system. Part I. Constant-fraction discriminator

Description: Position-resolution capabilities of the NASA laser ranging system are essentially determined by time-resolution capabilities of its optical timing receiver. The optical timing receiver consists of a fast photoelectric device, primarily a standard of microchannel-plate-type photomultiplier or an avalanche photodiode detector, a timing discriminator, a high-precision time-interval digitizer, and a signal-processing system. The time-resolution capabilities of the receiver are determined by the pho… more
Date: August 14, 1975
Creator: Leskovar, B. & Lo, C.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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