The PHARUS Project; Real Time Digital Processing of Airborne Polarimetric Radar Signals
conference paper
The Dutch PHARUS project aims for the developrlenÈ of a polarimetric C-band aircraft SAR, to be finalized in 1994. The PHARUS systen consists of three subsystens: the radar, the subsystem for the onboard data processing and recording and the ground-based subsystem for SAR processing. PHARUS is a very flexible system with numerous operating modes, intended for renote sensing research. Modes vary from a straighc forward single mode (e.g. HH polarisation)to a full polarimetric mode with alternating chirp patterns.
This paper describes selected items of the onboard data processlng and recording subsystem, as it is under construction now. Data processing starts with high speed digitization of the offsec modulated radar slgnals. The digitized offsec modulated signals are demodulated and re-sampled (in range) to complex base band signals. A low pass filtering and decimation in flight direction is performed. Finally, pulse cornpression is performed based on FFT and IFFT.
This paper describes selected items of the onboard data processlng and recording subsystem, as it is under construction now. Data processing starts with high speed digitization of the offsec modulated radar slgnals. The digitized offsec modulated signals are demodulated and re-sampled (in range) to complex base band signals. A low pass filtering and decimation in flight direction is performed. Finally, pulse cornpression is performed based on FFT and IFFT.
TNO Identifier
94607
Publisher
METEO-FRANCE
Source title
Specialty Meeting on Airborne Radars and Lidars, July 7-10, 1992, Toulouse, France
Place of publication
Toulouse
Pages
175-182