Results 31 to 40 of about 24,045 (203)

Design, Implementation and Characterization of Cavity for Absolute Radiometer

Frontiers in Physics, 2021
Absolute radiometers are based on electrical substitution radiometers, which compare optical and electrical power. The same physical principle applies to standard reference detectors operating at cryogenic temperatures and room temperature radiometers ...
Franciele Carlesso, Luis E. A. Vieira, Luiz A. Berni, Graziela da S. Savonov   +3 more
doaj   +1 more source

Planck-LFI: Design and Performance of the 4 Kelvin Reference Load Unit [PDF]

, 2009
The LFI radiometers use a pseudo-correlation design where the signal from the sky is continuously compared with a stable reference signal, provided by a cryogenic reference load system.
A Brighenti, A De Rosa, A Garbesi, A Gregorio, A Mennella, A Simonetto, A Zacchei, A Zonca, A. Mennella ., A. Mennella ., D.J. Fixsen ., E Panagin, F Cavaliere, F Cuttaia, F Villa, G Morgante, G Morigi, G Orsi, G P Cazzola, G. Morgante ., G. Papendrecht, G. Papendrecht, J. Leahy ., J. Tauber ., J. Varis ., J.-L. Puget, J.A. Tauber, J.A. Tauber, J.A. Tauber, J.C. Mather, J.M. Lamarre ., L Mendes, L Pagan, L Stringhetti, L Terenzi, L Valenziano, M Bersanelli, M Biggi, M Frailis, M Maris, M Sandri, M Tomasi, M. Bersanelli ., M. Sandri, M. Sandri ., N Mandolesi, N. Mandolesi ., O D'Arcangelo, P Battaglia, P Meinhold, R C Butler, R Lapini, R Leonardi, S Galeotta, S Levin, S Mariotti, S R Lowe, T.W. Bradshaw   +57 more
core   +2 more sources

Antarctic Firn Characterization via Wideband Microwave Radiometry

Remote Sensing, 2022
Recent studies have demonstrated that wideband microwave radiometers provide significant potential for profiling important subsurface polar firn characteristics necessary to understand the dynamics of the cryosphere and predict future changes in ice and ...
Rahul Kar, Mustafa Aksoy, Dua Kaurejo, Pranjal Atrey, Jerusha Ashlin Devadason   +4 more
doaj   +1 more source

ARCADE: Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission [PDF]

, 2006
The Absolute Radiometer for Cosmology, Astrophysics, and Diffuse Emission (ARCADE) is a balloon-borne instrument designed to measure the temperature of the cosmic microwave background at centimeter wavelengths.
A. Kogut, Bartlett, Burigana, Burigana, D. Fixsen, E. Wollack, Fixsen, Fixsen, Fixsen, Fixsen, Fornengo, Gnedin, Gush, Haiman, J. Singal, Jungman, Kogut, Kogut, L. Lowe, M. Limon, M. Seiffert, Mather, Oh, P. Lubin, P. Mirel, S. Fixsen, S. Levin, Singal, Sunyaev, Valle, Zeld´ovich   +30 more
core   +2 more sources

CRYOGENIC RECEIVING FOCAL UNIT FOR TELESCOPES OF RADIOINTERFEROMETRIC COMPLEX OF NEW GENERATION

Radio Physics and Radio Astronomy, 2014
Results of synthesis, design and tests of the experimental sample of cryogenic receiving focal unit (CRFU) for telescopes of Russian radio interferometric complex of new generation are presented.
A. B. Ipatov, V. M. Chmil, V. M. Skresanov, D. V. Ivanov, V. V. Mardyshkin, V. K. Chernov, O. M. Pylypenko, A. A. Kirilenko   +7 more
doaj   +1 more source

The effect of low temperatures on the sensitivity of radiometers [PDF]

, 1930
The behavior of radiometers at low temperatures, besides being of some interest to the theoretical physicist,(2) is of considerable importance to one desiring to carry radiant energy measurements to an extreme limit.
Smith, Sinclair
core   +1 more source

Feasibility for Operationally Monitoring Ground-Based Multichannel Microwave Radiometer by Using Solar Observations

Atmosphere, 2021
Ground-based multichannel microwave radiometers can observe the atmospheric microwave radiation brightness temperature and continuously provide temperature and humidity profiles of the troposphere.
Lianfa Lei, Zhenhui Wang, Jiang Qin, Lei Zhu, Rui Chen, Jianping Lu, Yingying Ma   +6 more
doaj   +1 more source

Assessment of CCMP in Capturing High Winds with Respect to Individual Satellite Datasets

Remote Sensing
High-wind structures were identified in the Cross-Calibrated Multi-Platform (CCMP) ocean wind vector reanalysis for comparison with winds measured by satellite radiometers, scatterometers, and synthetic aperture radar (SAR) instruments from February to ...
Pingping Rong, Hui Su
doaj   +1 more source

Improved constraints on primordial non-Gaussianity for the Wilkinson Microwave Anisotropy Probe 5-yr data [PDF]

, 2009
We present new constraints on the non-linear coupling parameter fnl with the Wilkinson Microwave Anisotropy Probe (WMAP) data. We use an updated method based on the spherical Mexican hat wavelet (SMHW) which provides improved constraints on the fnl ...
A. Curto, Bennett, Creminelli, Creminelli, De Troia, E. Martínez-González, Górski, Komatsu, Komatsu, Komatsu, Liguori, Martínez-González, Mukherjee, R. B. Barreiro, Rudjord, Slosar, Smith, Spergel   +17 more
core   +2 more sources

Offset balancing in pseudo-correlation radiometers for CMB measurements

, 2003
Radiometeric CMB measurements need to be highly stable and this stability is best obtained with differential receivers. The residual 1/f noise in the differential output is strongly dependent on the radiometer input offset which can be cancelled using ...
Bennett, Bersanelli, Bersanelli, Jarosik, Jarosik, Mennella, Pospieszalski, Seiffert, Smoot, Smoot, Tuovinen, Wollack   +11 more
core   +1 more source