Design and development of a microwave radiometer technology laboratory

Harrington, R. F.; Grady, Ben; Hearn, C. P.

doi:10.1109/comeas.1995.472360

Cited by 2 publications

(1 citation statement)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Microwave radiometers as an important part of microwave remote sensing, can be used to retrieve the profile of the atmospheric and the sea-surface temperature, the near-surface wind speed, water vapor density, the liquid water content of clouds and rain and the sea ice types [1]. It can also be used to monitor the snow-water content and the spatial distribution of soil-moisture content, which are important factors for hydrology, agriculture and meteorology.…”

Section: Introductionmentioning

confidence: 99%

Ground-based microwave radiometer design and real-time calibration for ocean remote sensing

Zhang

Huang

et al. 2010

2010 International Symposium on Signals, Systems and Electronics

View full text Add to dashboard Cite

A multi-frequency, ground-based microwave radiometer (MWR) for ocean remote sensing has been designed and developed in this paper. It will be used on the offshore oil platform and provide atmospheric soundings of physical temperature and liquid water vapor using channels in the oxygen resonance band (6.8GHz) and water vapor resonance band (23.8GHz). The other channels at 10.7GHz, 18.7GHz and 37GHz are used as atmospheric windows, each with dual polarization. The measurements at various combinations of these frequencies and polarization will obtain many geophysical parameters such as the sea-surface temperature, near-surface wind speed, sea ice types and so on. The multi-frequency microwave radiometer is a five frequencies, ten channels and linear polarization system. The receiver is working at total-power mode with super heterodyne style. And the data processing and system control unit is used of operating mode control, data acquisition and digitizing, automatic gain control, state control of the radiometer system and communication with the remote computer system by asynchronous serial interface. Besides, an absolute calibration and a quasi-real-time calibration method used in the multifrequency MWR are presented and the relative result is also discussed, which guaranteed the high resolution of the multifrequency microwave radiometer system.

show abstract

Section: Introductionmentioning

confidence: 99%

Ground-based microwave radiometer design and real-time calibration for ocean remote sensing

Zhang

Huang

et al. 2010

2010 International Symposium on Signals, Systems and Electronics

View full text Add to dashboard Cite

show abstract

SDR-Based Dual Polarized L-Band Microwave Radiometer Operating From Small UAS Platforms

Farhad,

Alam,

Biswas

et al. 2024

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

View full text Add to dashboard Cite

Passive microwave remote sensing is a vital tool for acquiring valuable information regarding the Earth's surface, with significant applications in agriculture, water management, forestry, and various environmental disciplines. Precision agricultural (PA) practices necessitate the availability of field-scale, high-resolution remote sensing data products. This study focuses on the design and development of a cost-effective, portable L-band microwave radiometer capable of operating from an unmanned aircraft system (UAS) platform to measure highresolution surface brightness temperature (TB). This radiometer consists of a dual-polarized (Horizontal polarized, H-pol and Vertical polarized, V-pol) antenna and a software-defined radio (SDR)-based receiver system with a 30 MHz sampling rate. The post-processing methodology encompasses the conversion of raw in-phase and quadratic (I&Q) surface emissions to radiation TB through internal and external calibrations. Radiometric measurements were conducted over an experimental site covering both bare soil within an agricultural field and a large water body. The results yielded a high-resolution TB map that effectively delineated the boundaries between land and water, and identified land surface features. The radiometric temperature measurements of the sky and blackbody demonstrated a standard deviation of 0.95 K for H-pol and 0.57 K for V-pol in the case of the sky and 0.39 K for both H-pol and V-pol in the case of the blackbody observations. The utilization of I&Q samples acquired via the radiometer digital back-end facilitates the generation of different time-frequency (TF) analyses through short-time Fourier transform (STFT) and power spectral density (PSD). The transformation of radiometer samples into TF representations aids in the identification and mitigation of radio frequency interference (RFI) originating from the instrument itself and external sources.

show abstract

Design and development of a microwave radiometer technology laboratory

Cited by 2 publications

References 1 publication

Ground-based microwave radiometer design and real-time calibration for ocean remote sensing

Ground-based microwave radiometer design and real-time calibration for ocean remote sensing

SDR-Based Dual Polarized L-Band Microwave Radiometer Operating From Small UAS Platforms

Contact Info

Product

Resources

About