Comparison of analog continuum correlators for remote sensing and radio astronomy
نویسندگان
چکیده
Two different designs of analog correlators for radiometry are compared in this paper. A continuum correlator based on a microwave nonlinear device is a simple and inexpensive way to detect wide-band polarized signals. Analysis and extensive measurements including linearity, dynamic range, amplitude response, phase balance, and stability are presented, and the suitability of the designs for microwave radiometry is discussed. Both correlators showed nearly ideal performance. A novel method for determining the correlator degradation factor is applied.
منابع مشابه
Comparison of spectrum indices for mapping soil salinity in saline lands of Chezan plain (Markazi province)
Soil salinity phenomena are one of the main problems of arid and semi-arid lands. Saline soils constitute a huge part of Iran, and also threaten its neighboring lands. Therefore, in order to optimum exploitation of such soils, qualitative monitoring is necessary. Recently, remote sensing techniques have been increasingly applied in monitoring soil characteristics. The present study was carried ...
متن کاملDiscussion Reasons loss of Bamdzh wetland area with attention to the drought and the techniques of remote sensing
Bamdzh wetland of Khuzestan Province is at downstream of Shavvr River. Its area is approximately 4 hectares. Due to the loss of wetland area, especially in recent decades, this study investigated the effects of a five-year drought (2007-2012) in the Shavvr region and the pond ultimately. Also the comparison between the satellite images and remote sensing technique has been used and was estimat...
متن کاملAccelerating a Software Radio Astronomy Correlator using FPGA co-processors
Introduction This poster presents and characterises our work on accelerating a software radio astronomy correlator using reconfigurable computing (RC) hardware. Radio astronomy correlation is an embarrassingly parallel signal processing application, which is used heavily in radio astronomy for imaging and other astronomical measurements. Radio astronomy correlators typically operate on huge dat...
متن کاملEstimation of soil moisture using optical, thermal and radar Remote Sensing )Case Study: South of Tehran(
Traditional methods of field measurement of soil moisture in addition to the difficulty, the need for manpower and money and fail to take place on a large scale to be able to show moisture. Therefore, remote sensing has become a widespread use .Landsat 8 satellite data and Sentinel-1 radar satellite from Tehran were provided. 72 soil samples were taken at the same time by satellite passing from...
متن کاملIdentification of Groundwater Potential Zones in Moalleman, Iran by Remote Sensing and Index Overlay Technique in GIS
Water plays a vital role in the development of activities in an area. The surface water resources are inadequate to fulfill the water demand. Productivity through groundwater is quite high as compared to surface water, but groundwater resources have not yet been properly exploited. Keeping this view, the present study attempts to select and delineate various groundwater potential zones for the ...
متن کاملذخیره 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 ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- IEEE Trans. Instrumentation and Measurement
دوره 51 شماره
صفحات -
تاریخ انتشار 2002