Design of 90 GHz Band Radiometer System for Remote Sensing Applications
نویسندگان
چکیده
The 92 GHz radiometer system, which will be used for an atmosphere remote sensing, is presented in this paper. The characteristics of RE and IF module are described. The architecture of radiometer including data acquisition, data storage and digital signal processing using notebook computer are explained and the result of indoor experiment is introduced. The radiometer system is designed as a total power type to obtain the high temperature sensitivity. The effect due to system instability can be removed by the computer compensated calibration method. The system noise figure and total gain of implemented radiometer are 12dB and 56dB, respectively. The short-term stability of 92GHz radiometer is evaluated from the experiment. The difference of the radiometer output voltages for two targets, whose brightness temperature are 120K and 300K, is about 40 mV.
منابع مشابه
L-band Imaging Radiometry with Airborne HUT-2D Interferometer – From the Performance to Remote Sensing Applications
Airborne radiometer system HUT-2D, operated by Helsinki University of Finland (TKK), stands for a new technology in the field of remote sensing. Applying the novel principles of interferometry and aperture synthesis, the instrument is capable in multi-angular airborne measurements at L-band, 1.41 GHz to be exact [1]. The most important environmental parameters desired from the measurements of t...
متن کاملELBARA II, an L-Band Radiometer System for Soil Moisture Research
L-band (1-2 GHz) microwave radiometry is a remote sensing technique that can be used to monitor soil moisture, and is deployed in the Soil Moisture and Ocean Salinity (SMOS) Mission of the European Space Agency (ESA). Performing ground-based radiometer campaigns before launch, during the commissioning phase and during the operative SMOS mission is important for validating the satellite data and...
متن کاملMicrowave radiometric technique to retrieve vapor, liquid and ice. I. Development of a neural network-based inversion method
With the advent of the microwave radiometer, passive remote sensing of clouds and precipitation has become an indispensable tool in a variety of meteorological and oceanographical applications. There is wide interest in the quantitative retrieval of water vapor, cloud liquid, and ice using brightness temperature observations in scientific studies such as earth’s radiation budget and microphysic...
متن کاملHow digital correlation affects the fringe washing function in L-band aperture synthesis radiometry
The phase coherence limitations of L-band digital correlation radiometry are investigated for receiver architectures that use low A/D converter resolution (1–3 bits). Statistical models and measurements of a 1.4 GHz digital radiometer system show that coarse quantization can cause excess fringe washing losses which degrade the spatial resolution capabilities in synthetic thinned array radiometr...
متن کاملEnhancing Oceanic Retrievals using Microwave Radiometry
The Central Florida Remote Sensing Laboratory, CFRSL, of the School of Electrical Engineering and Computer Science at the University of Central Florida is engaged in research to improve passive microwave remote sensing techniques for inferring oceanic and atmospheric geophysical parameters. This paper presents an overview of research that falls into three major areas, namely; airborne hurricane...
متن کامل