Research Activity on Synthetic Aperture Radiometry in CSSAR/CAS

نویسندگان

  • Ji Wu
  • Hao Liu
  • Shouzheng Ban
  • Xiaolong Dong
  • Jingshan Jiang
چکیده

Interferometric synthetic aperture radiometry is a relative new technique in the area of microwave earth observation to measure the brightness temperature distribution of the earth. It can enhance the spatial resolution of the passive microwave remote sensing effectively. Steady progress of this technology have been achieved in both one dimensional and two dimensional cases since 1990’s. The typical instruments are ESTAR and MIRAS, developed by NASA (and umass) and ESA respectively. Relative research has also been conducted in China, mainly by National Microwave Remote Sensing Laboratory (NMRS Lab), Center for Space Science and Applied Research (CSSAR), Chinese Academy of Sciences (CAS), since the middle of 1990’s. A C-band and an X-band instrument has been developed. In this paper, research activities on synthetic aperture radiometry in CSSAR/CAS will be reviewed and summarized, including the development of the instruments. Finally, further plans in synthetic aperture radiometry in CSSAR/CAS will also be prospected.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A regularized approach for processing full-polarimetric data in synthetic aperture imaging radiometry

Synthetic Aperture Imaging Radiometers (SAIR) are powerful sensors for high-resolution observations of the Earth at low microwaves frequencies. This contribution extends the concept of “band-limited resolving matrix” for retrieving brightness temperature maps from complex visibilities measurements to the case of the processing of fullpolarimetric data.

متن کامل

The Object Detection Efficiency in Synthetic Aperture Radar Systems

The main purpose of this paper is to develop the method of characteristic functions for calculating the detection characteristics in the case of the object surrounded by rough surfaces. This method is to be implemented in synthetic aperture radar (SAR) systems using optimal resolution algorithms. By applying the specified technique, the expressions have been obtained for the false alarm and cor...

متن کامل

Passive mm-wave imaging from UAVs using aperture synthesis

Passive imaging using mm-waves offers very significant advantages in scientific and military surveillance. However, the relatively long wavelengths mean that for the resolutions that are typically sought, the input aperture of the imager needs to be quite large; typically in excess of one metre. Deployment of conventional dish antennae of these dimensions on small aircraft is highly problematic...

متن کامل

Design and Implementation of Digital Correlator for CAS Synthetic Aperture Radiometer

We present a new method of digital correlation, which uses the technology of direct intermediate frequency or radio frequency sampling and digital phase shift. Digital correlators down-sample IF or RF signals with 3-bit analog-to-digital converters and then delay one sampling interval for quadrature phase shift. Following the same procedure as analog correlation, the digitalized I/Q pairs are p...

متن کامل

Application of an Eight-channel Comparator in a Cross- Correlator for Synthetic Aperture Radiometry

The ever-increasing demand for accuracy of weather forecasting and understanding of weather phenomena requires new weather observation methods. Earth observation in the microwave regions can provide important data on moisture and temperature distributions in the atmosphere, even within cloud formations where such observations are not achievable in the visible or infrared spectrum due to occlusion.

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2006