The NASA/JPL Multifrequency, Multipolarisation Airborne SAR System

Held, D. N.; Brown, W.E.; Freeman, A.; Klein, J.; Zebker, H. A.; Sate, T.; Miller, Theodore K.; Nguyen, Quynh Nhu; Lou, Yunling

doi:10.1109/igarss.1988.570130

Cited by 47 publications

(16 citation statements)

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“…The site is characterized by flat topography and large, uniformly planted rectangular fields. The NASA/JPL DC-8 SAR (Held et al 1988) used in the campaign produced fully polarimetric radar images at C, Land P bands (wavelengths of 5,7, 24, and 68 em, respectively) with incidence angle varying across the swath from about 20 to 55°. Calibration of the Flevoland data was accomplished using the signatures from some trihedral corner reflectors deployed within the imaged scene.…”

Section: Introductionmentioning

confidence: 99%

On the use of multi-frequency and polarimetric radar backscatter features for classification of agricultural crops

Freeman

Villasenor

Klein

et al. 1994

International Journal of Remote Sensing

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Section: Introductionmentioning

confidence: 99%

On the use of multi-frequency and polarimetric radar backscatter features for classification of agricultural crops

Freeman

Villasenor

Klein

et al. 1994

International Journal of Remote Sensing

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“…Table 3 summarizes the specifications of various chirp generators used in existing SAR sensors [8][9][10][11][12].…”

Section: The Chirp Signalmentioning

confidence: 99%

Fpga-Based Chirp Generator for High Resolution Uav Sar

Chua¹,

Koo²

2009

PIER

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Abstract-This paper discusses the design and development of a FPGA-based chirp generator for high resolution Unmanned Aerial Vehicle (UAV) Synthetic Aperture Radar. The desired bandwidth of the chirp signal is 100 MHz (combination of I and Q channels) with a chirp rate of 5 MHz/µs. Two algorithms based on the Memory-based architecture and the Direct Digital Synthesizer (DDS) architecture are presented. The measurement results indicate that the DDS chirp generator is a preferred choice for high-resolution SAR application.

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“…Among the SARs surveyed include Airborne SAR (AIRSAR) by NASA (National Aeronautics Space Association) of the US [16], European Remote Sensing Satellites (ERS) in 1991 [17], South African SAR II (SASAR II) in 2004 [18], CCRS by the Canada Centre for Remote Sensing in 1986 prior to the launching of RADARSAT-1 in 1995 [19], the Japanese Earth Resources Satellite-1 (JERS-1) in 1992 [20], and the Shuttle Imaging Synthetic Aperture Radar (SIR) in 1978 [21], which is a cooperative space shuttle experiment between NASA, the German Space Agency (DARA), and the Italian Space Agency (ASI). From Table 3, it is observed that the parameters such as microwave band, bandwidth, pulse width, data format and sampling frequency resemble yet vary among the chirp generators developed by various institutions.…”

Section: Parameter Selectionmentioning

confidence: 99%