Results 61 to 70 of about 24,045 (203)

ACCURACy: A Novel Calibration Framework for CubeSat Radiometer Constellations

Remote Sensing
As a result of progress in space technology, more scientific missions are benefiting from using CubeSats equipped with radiometers. CubeSat constellations are especially effective in overcoming obstacles in cost, weight, and power.
John Bradburn, Mustafa Aksoy, Lennox Apudo, Varvara Vukolov, Henry Ashley, Dylan VanAllen   +5 more
doaj   +1 more source

Optical and electrical measurements on UV sensitive photodiodes [PDF]

The optical and electrical characteristics of the various types of photodiodes potentially useful for UV radiometers were studied. It was concluded that both GaAsP and GaP photodiodes have advantages over silicon photodiodes in terms of spectral response
Lyall, H., Wilson, A. D.
core   +1 more source

WMAP Polarization Results

, 2003
The Wilkinson Microwave Anisotropy Probe (WMAP) has mapped the full sky in Stokes I, Q, and U parameters at frequencies 23, 33, 41, 61, and 94 GHz. We detect correlations between the temperature and polarization maps significant at more than 10 standard ...
A Kogut, Barnes, Becker, Bennett, Bennett, Bennett, Bennett, Cen, Coulson, Djorgovski, Fan, Gnedin, Haiman, Haiman, Hinshaw, Hinshaw, Hu, Hu, Jarosik, Kamionkowski, Kaplinghat, Oh, Page, Page, Peiris, Seljak, Spergel, Tegmark, Venkatesan, Venkatesan, Wyithe, Zaldarriaga, Zaldarriaga   +32 more
core   +1 more source

Method for calibration of UV radiometers of irradiance

Технологія та конструювання в електронній апаратурі, 2008
The problems arising during the calibration of radiometers with narrowband spectral sensitivity are considered. A method for transferring the unit of irradiance to UV radiometers is presented — the methodology for calibration of UV radiometers.
I. V. Doctorovich, V. K. Butenko, V. N. Hodovaniuk, I. M. Fodchuk, V. G. Yuriev   +4 more
doaj  

The Temperature of the CMB at 10 GHz

, 2004
We report the results of an effort to measure the low frequency portion of the spectrum of the Cosmic Microwave Background Radiation (CMB), using a balloon-borne instrument called ARCADE (Absolute Radiometer for Cosmology, Astrophysics, and Diffuse ...
A. Kogut, Bersanelli M., Burigana C., Burigana C., D. J. Fixsen, E. Wollack, Haslam C. G. T., Hemmati H., M. Limon, M. Seiffert, P. Lubin, P. Mirel, Raghunathan A., S. Levin, Sunyaev R. A.   +14 more
core   +1 more source

Microwave Radiometer Calibration Using Deep Learning With Reduced Reference Information and 2-D Spectral Features

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The accuracy of geophysical retrievals from radiometers relies on calibration quality, encompassing both absolute radiometric accuracy and spectral consistency.
Ahmed Manavi Alam, Mehmet Kurum, Mehmet Ogut, Ali C. Gurbuz   +3 more
doaj   +1 more source

An External Calibration Method for Compensating for the Mutual Coupling Effect in Large Interferometric Aperture Synthesis Radiometers

International Journal of Antennas and Propagation, 2011
This paper deals with the antenna mutual coupling effect in interferometric aperture synthesis radiometers (IASRs), which degrades the system radiometric performance.
Jian Dong, Ronghua Shi, Ke Chen, Qingxia Li, Wentai Lei   +4 more
doaj   +1 more source

Observing Conditions for Submillimeter Astronomy [PDF]

, 2011
Consistently superb observing conditions are crucial for achieving the scientific objectives of a telescope. Submillimeter astronomy is possible only at a few exceptionally dry sites, notably Mauna Kea, the Antarctic plateau, and the Chajnantor region in
Radford, Simon J. E.
core   +3 more sources

Thermodielectric radiometer. [PDF]

Journal of Spacecraft and Rockets, 1968
B. BEAM, L. RUSSELL
openaire   +1 more source

The Maribo CM2 meteorite fall - survival of weak material at high entry speed

, 2019
High entry speed (> 25 km/s) and low density (< 2500 kg/m3) are two factors that lower the chance of a meteoroid to drop meteorites. The 26 g carbonaceous (CM2) meteorite Maribo recovered in Denmark in 2009 was delivered by a superbolide observed by ...
Borovicka, Jiri, Popova, Olga, Spurny, Pavel   +2 more
core   +1 more source