Radiometers Research Papers - Academia.edu (original) (raw)

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- Frequency Conversion, Radiometers, Electrical And Electronic Engineering
- by estelle obligis
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- Geophysics, Geoscience and remote sensing, Models, Field Experiment
- by Roy Spencer
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- Geophysics, Energy, Earth, Climate
- by Mac McKee
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- Remote Sensing, Ecology, Calibration, Temperature measurement
- by Andrew Manu
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- Remote Sensing, Hydrology, Irrigation, Soil moisture

Blue Light Therapy atau Fototerapi merupakan suatu alat yang digunakan untuk terapi mengatasi keadaan hiperbilirubunemia dengan menggunakan sinar biru. Alat ini bekeja dengan cara memancarkan sinar biru dengan lampu khusus. Cahaya Meter... more

- by Iwan Krisnadi
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- The Internet, Blue Light, Radiometers, Ardiuno

- by iwan krisnadi
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- Blue Light, Radiometers, Arduino nano

The Art Bulletin, vol. 71 (March 1989), 114-23.

- by Linda Dalrymple Henderson
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- Marcel Duchamp, X Rays, Francis Picabia, Radiometers
- by Glenn Prescott
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- Monte Carlo Simulation, Spread Spectrum, Detectors, Spread Spectrum Communication
- by John G Witzel
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- Physics, Glass, Fluid Dynamics, Spinning
- by ngan tran
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- Geophysics, Earth, Seasonality, Geomatic Engineering

- by Iwan Krisnadi
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- Blue Light, Radiometers, Arduino nano
- by Changwoo Ahn
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- Remote Sensing, Sorting Algorithms, Mathematical Models, Smoke
- by M. Hallikainen
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- Remote Sensing, Space Technology, Global Positioning System, Frequency
- by Sharmila Padmanabhan
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- Temperature, Low Cost, Weather, Constellations
- by Paul Hwang
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- Remote Sensing, Signal Processing, Computational Modeling, Atmospheric Modeling
- by Shihyan Lee
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- Geophysics, Remote Sensing, Earth, Calibration
- by Mark Helmlinger
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- Geophysics, Space Technology, Propulsion, Calibration

The microwave imaging radiometer using aperture synthesis (MIRAS) (M. Martin-Neira et al., November 1997) is the single payload of the SMOS (soil moisture and ocean salinity) mission by the European Space Agency (ESA). MIRAS performance was successfully tested during spring 2007 by the prime contractor, EADS-CASA Espacio Spain, at ESA premises in ESTEC, The Netherlands. The payload is currently in Thales, Alenia Space, in Cannes (France), for integration with the satellite platform: http://www.esa.int/esaLP/LPsmos.html. MIRAS-SMOS launching is currently scheduled by the end of 2008.

- by Ana Olea
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- Microwave Imaging, UAV payloads, Space Missions, Radiometers

The Remote Sensing Group at the University of Arizona has developed an automated methodology and instrument suite to measure the surface reflectance of the vicarious calibration test site at Railroad Valley, Nevada. Surface reflectance is a critical variable used as one of the inputs into a radiative transfer code to predict the top-of-atmosphere radiance, and inexpensive and robust ground-viewing radiometers have been present at the site since 2004. The goal of the automated approach is to retain RSG's current 2-3% level of uncertainty while increasing the number of data sets collected throughout the year without the need for on-site personnel. A previous study was completed to determine if the number and positions of the four radiometers were adequate to spatially sample the 1-km2 large-footprint site at Railroad Valley. The preliminary study utilized one set of panchromatic data from Digital Globe's QuickBird satellite. Results from this one day showed that the positions of the four ground-viewing radiometers adequately sample the site. The work presented here expands in a spectral and temporal sense by using high-spatial-resolution data from Ikonos, QuickBird, and Landsat-7 ETM+ to determine if the locations of the ground-viewing radiometers correctly sample the site. The multispectral capability of these sensors is used to establish if there are any spectral effects, which will also help RSG to determine what spectral bands should be chosen for the new ground-viewing radiometers that are currently in development for the automated test site at Railroad Valley.

- by Byron Cocilovo and +1
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- Remote Sensing, Localization, Sensors, Calibration
- by Christopher Justice and +2
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- Remote Sensing, Sea Ice, Vegetation, Infrared
- by Patrick Minnis
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- Mechanical Engineering, Aerospace Engineering, Remote Sensing, Comparative Study
- by Ignasi Corbella
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- Geophysics, Remote Sensing, Earth, Image Reconstruction
- by Peter North
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- Geophysics, Algorithms, Remote Sensing, Light Scattering

SMOS is the acronym for the Soil Moisture and Ocean Salinity mission by the European Space Agency (ESA) [1]. Its single payload, the Mcrowave Imaging Radiometer using Aperture Synthesis (MΓRAS), was successfully launched in November 2009. A six months Commissioning Phase was devoted to bring the satellite into a fully operational condition and to characterize the payload using specific orbits to check all instrument modes [2]. An on- going activity is devoted to analyze the contribution of each single calibration procedure to the overall radiometric accuracy in order to assess the dominant sources of spatial errors. In this framework, this paper is devoted to assess the performance of the phase calibration procedures by means of the so called Redundant Space Calibration (RSC)1.

- by Ruben Davila
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- Remote Sensing, Noise, Microwave Imaging, Soil moisture
- by Alexis Mouche
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- Geophysics, Oceanography, Algorithms, Remote Sensing
- by Wojciech Wiatr
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- Network Analysis, Metrology, Computer Software, Noise
- by Vincent Salomonson
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- Geophysics, Remote Sensing, Performance, Climate
- by E. Westwater
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- Geophysics, Remote Sensing, Meteorology, Geoscience and remote sensing
- by Linwood Jones
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- Geophysics, Remote Sensing, Models, Microwave Imaging

Pasif MiliMetre Dalga Görüntüleme Sistemi (PMMDGS) projesinde kullanılmak üzere radyometrik
alıcı tasarımı yapılmıştır. Bu radyometrik alıcı; anten, düşük güçlü güç kuvvetlendirici (LNA – Low
Noise Amplifier), dedektör, alçak geçiren süzgeç (LPF – Low Pass Filter) ve video kuvvetlendiriciden
(VA – Video Amplifier) oluşur. Bu çalışmada; tasarımı yapılan radyometrik alıcıda kullanılabilecek
olan antenler anlatılmıştır. Bu antenler, klasik Vivaldi anten, Vivaldi fed anten, antipodal Vivaldi anten
ve horn anten olarak özetlenebilir. Çalışma frekansı olarak 35 GHz seçilmiştir. Çünkü PMMDGS
üretilmek isteniyorsa 35 GHz, 96 GHz, 220 GHz gibi özel frekans pencerelerinin kullanılması sis, toz
bulutu, kum fırtınası gibi hava olaylarından etkilenmemek için gereklidir. Her bir antenin avantaj ve
dezavantajları aktarılmış, sonuç olarak; horn antenin kullanılmasına karar verilmiştir. Tasarımlar
Antenna Magus ve Computer Simulation Technology (CST) Programı’nda gerçekleştirilmiştir.

- by Mehmet DUMAN
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- Antenna, Radiometers, Passive microwave remote sensing, anten
- by Jerry Miller
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- Geophysics, Oceanography, Algorithms, Information Retrieval
- by Frank Vignola
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- Comparative Study, Instrumentation, Calibration, Statistical Significance
- by María Piles
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- Remote Sensing, Image Reconstruction, Microwave Imaging, Deconvolution
- by Animesh Maitra
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- Casting, Thunderstorms, Radiometers

This paper deals with spectrum sensing for dynamic spectrum access (DSA) via channelized radiometers. Consecutive mean excision (CME) algorithms have been employed in the literature to identify the presence or absence of licensed user signals. To obtain better control of false-alarm rate and detection rate, an improved CME algorithm is proposed in this paper, in which two thresholds are incorporated to perform the channel cluster based licensed user signal detection. It is verified through numerical experiments that with appropriate compromise on setting the two thresholds, the improved CME algorithm can significantly boost the detection rate while ideally maintain the false-alarm rate as sufficiently low as desired.

- by M. Martín-neira
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- Environmental Science, Geophysics, Computer Science, Instrumentation
- by Zhanqing Li
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- Environmental Science, Geophysics, Forestry, Climate Change
- by Christopher Ruf
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- Environmental Science, Computer Science, Earth, Calibration
- by Keith W Miller
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- Computer Science, Image Quality, Sampling, Degradation
- by M. Martín-neira
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- Microwave Imaging, Space Missions, Radiometers, Apertures
- by Patrice Côté
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- Aerospace Engineering, Optics, Radiation, Packaging
- by R. Ferretti and +1
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- Geophysics, Remote Sensing, Statistical Analysis, Global Positioning System
- by Hafizur Rahman
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- Remote Sensing, Atmospheric Modeling, Satellite remote sensing, Near Infrared
- by Brian Stocks
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- Geophysics, Forestry, Remote Sensing, Time Series
- by Sky End
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- Geophysics, Remote Sensing, Earth, Image Reconstruction
- by G. Heygster
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- Geophysics, Glaciology, Remote Sensing, Time Series