• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 53
  • 12
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 1
  • 1
  • Tagged with
  • 78
  • 20
  • 19
  • 19
  • 16
  • 10
  • 9
  • 8
  • 7
  • 7
  • 7
  • 7
  • 6
  • 6
  • 6
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Design and analysis of a spectrally narrow-band radiometer

Huttenhow, Jay Donald, 1943- January 1976 (has links)
No description available.
12

Development of a mesoscale radiometer for weather research

Meunier, Véronique Marcelle. January 2008 (has links)
A new microwave radiometer, the Mesoradiometer, was constructed and the meteorological information contained in its data were examined. This instrument is designed to measure the distribution of water vapor and liquid water in the atmosphere. / The Mesoradiometer uses 32 channels located on both sides of the 22.235 GHz water vapor absorption peak, as well as a narrow beam width antenna, and a pedestal giving the instrument the capacity to scan the atmosphere in order to detect water vapor. During the characterization of the instrument, a problem in maintaining the stability of the instrument's temperature was detected. / Even with this problem, the Mesoradiometer successfully measured atmospheric water vapor and liquid water. The instrument was capable of tracking the movements of clouds. This is possible thanks to its rapid scanning strategy, such tracking being impossible with traditional radiometers.
13

Total atmospheric attenuation at millimeter wavelengths

Hayes, R. D. (Robert Deming) 08 1900 (has links)
No description available.
14

Human presence detection using millimeter-wave radiometry

Nanzer, Jeffrey Allan. January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2008. / Vita. Includes bibliographical references.
15

Total power radiometers at 12, 20 and 30 GHz used in the OLYMPUS experiment at Virginia Tech /

Allnutt, Richard Mallory, January 1991 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1991. / Vita. Abstract. Includes bibliographical references (leaf 197). Also available via the Internet.
16

Simulation of brightness temperatures for the microwave radiometer on the Aquarius/SAC-D mission

Khan, Salman Saeed. January 2009 (has links)
Thesis (M.S.E.E.)--University of Central Florida, 2009. / Adviser: W. Linwood Jones. Includes bibliographical references (p. 167-168).
17

Microwave estimates of the extratropical transitions process /

Stubblefield, Cedrick L. January 2005 (has links) (PDF)
Thesis (M.S. in Meteorology)--Naval Postgraduate School, March 2005. / Thesis Advisor(s): Patrick Harr, Phil Durkee. Includes bibliographical references (p. 67-69). Also available online.
18

Inflight measurement of degradation of the reflected shortwave sensor on TIROS IV

Vonderhaar, Thomas Henry. January 1964 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1964. / eContent provider-neutral record in process. Description based on print version record. Bibliography: l. 18-19.
19

Studies on the likelihood and effect of fogging on a balloon radiometer

Hasler, Arthur Frederick, January 1965 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1965. / eContent provider-neutral record in process. Description based on print version record. Bibliography: l. 34.
20

Millimeter-wave radiometer for the measurement of temperatures in hot transient plasma

Carter, Charles Ruskin January 1966 (has links)
A superheterodyne Dicke type radiometer suitable for the measurement of radiation from a high temperature plasma in the 35 GHz range has been developed. The radiometer employs a balanced mixer at the radiometer frequency, a 3.5 GHz parametric amplifier using a varactor diode as the first IF amplifier, a broad-band transistor amplifier at the second IF of 7Q MHz and a commutator detector. The performance of the radiometer has been measured by conducting hot load tests and by using an S-band argon noise source. The minimum detectable temperature change was found from the hot load tests to be 11 deg K for an output bandwidth of 0.32 Hz. However, from argon noise source measurements, a minimum detectable temperature change of 1.4 x 10³ deg K was determined for an output bandwidth of 6.4 KHz and 9.5 x 10³ deg K for an output bandwidth of 160 KHz. The equation for the minimum detectable temperature change for the Dicke radiometer has been deduced following conventional analysis. It has been found that there are two errors in Goldstein's derivation the effects of which cancel out and his final formula is correct. Thus, the change suggested by Ring does not appear to be valid. For the two channel subtraction radiometer it has been found that the expression given by Graham should be multiplied by √2. The d.c. radiometer has also been analysed and it has been found that its minimum detectable signal power is independent of both the radiometer bandwidth and the output bandwidth. The effect of noise at the radiometer input before the modulating switch has been investigated and it is shown that this noise could produce a cutoff condition in the Dicke radiometer and the two channel subtraction radiometer. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate

Page generated in 0.0489 seconds