Zobrazeno 1 - 10
of 10
pro vyhledávání: '"K. B. Earnshaw"'
Publikováno v:
Applied optics. 17(3)
It has previously been shown that the scintillations produced by raindrops falling through a collimated laser beam can be used to measure the drop-size distribution and the rainfall rate, both averaged over the path. We now present a theoretical anal
Autor:
K. B. Earnshaw, E. Norman Hernandez
Publikováno v:
Applied optics. 11(4)
The Wave Propagation Laboratory of the Environmental Research Laboratories of the National Oceanic and Atmospheric Administration has been engaged in the development of dual-wavelength, optical distance-measuring instruments. Recently a new generatio
Publikováno v:
Journal of Applied Meteorology. 18:654-660
Path-averaged terminal velocity distribution of raindrops is determined from the temporal covariance function of signals from two vertically spaced linear optical detectors that respond to raindrop-induced amplitude scintillations of a projected lase
Publikováno v:
Journal of Atmospheric and Oceanic Technology. 1:37-49
Remote sensing instrumentation has advanced to the point where serious consideration is being given to a next-generation tropospheric sounding system that uses radars and radiometers to provide profiles of tropospheric variables continuously and auto
Autor:
Ed R. Westwater, Ken Moran, R. G. Strauch, W. B. Sweezy, F. O. Guiraud, K. B. Earnshaw, M. T. Decker, D. C. Hogg, D. A. Merritt, C. G. Little
Publikováno v:
Journal of Climate and Applied Meteorology. 22:807-831
A remote-sensing system for continuously profiling the troposphere is discussed; the prototype Profiler utilizes radio wavelengths, thereby achieving essentially all-weather operation. Designed for unattended operation, the Profiler employs radiometr
Publikováno v:
Journal of Applied Meteorology. 17:1476-1481
The possibility of identifying weather through the observation of forward scatter of a laser beam has been investigated. Preliminary observations with a prototype instrument suggest that it is possible to distinguish clear air, rain, snow, hail and f
Autor:
K. B. Earnshaw, G. M. B. Bouricius
Publikováno v:
Journal of Geophysical Research. 79:3015-3018
A two-color optical distance-measuring instrument has been developed and field tested. Results show that the instrument has a short-term (1 day) precision of 1 part in 107 and a long-term (months) precision of 2 parts in 107 without requiring atmosph
Autor:
E. N. Hernandez, K. B. Earnshaw
Publikováno v:
Journal of Geophysical Research. 77:6994-6998
The most recent version of a microwave-modulated two-laser distance-measuring instrument has completed several months of field tests. This instrument was operated almost continuously for about a month over a 5.9-km base line just north of Boulder, Co
Autor:
James C. Owens, K. B. Earnshaw
Publikováno v:
SPIE Proceedings.
The development of lasers, new electro-optic light modulation methods, and improved electronic techniques have made possible significant improvements in the range and accuracy of optical distance measurements, thus providing not only improved ranging
Autor:
J. Owens, K. B. Earnshaw
Publikováno v:
IEEE Journal of Quantum Electronics. 3:257-258