The MIRAS demonstrator pilot project

Borges, A.; Solana, Andres; Plaza, Miguel Ángel; Sanz, J.; Garcia, Q.

doi:10.1109/igarss.2000.860306

Cited by 1 publication

(2 citation statements)

References 1 publication

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“…4 shows the fringe washing results from the correlation DSDR experiments. The solid line is a plot of the expected (analog) response, derived from (7). Notice that this curve closely resembles a sinc function with a correlation length of 50 ns-which is exactly the result predicted by (4) for receivers having a 20 MHz rectangular bandpass response.…”

Section: B Fringe Washing Measurementssupporting

confidence: 74%

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How digital correlation affects the fringe washing function in L-band aperture synthesis radiometry

Fischman

England

Ruf

2002

IEEE Trans. Geosci. Remote Sensing

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The phase coherence limitations of L-band digital correlation radiometry are investigated for receiver architectures that use low A/D converter resolution (1-3 bits). Statistical models and measurements of a 1.4 GHz digital radiometer system show that coarse quantization can cause excess fringe washing losses which degrade the spatial resolution capabilities in synthetic thinned array radiometry (STAR) implementations. For single-bit STAR, excess fringe washing is discernible immediately away from the boresight direction and, further from the center of the image, can result in as much as 2 dB loss in visibility information. To accommodate low-bit correlators in remote sensing STAR, a novel band division correlation (BDC) processor is proposed. BDC improves the time-coherence of each correlated brightness signal while it also maintains the system bandwidth and noise-equivalent sensitivity of a conventional STAR radiometer. Analytical and numerical solutions are presented for the point spread function of a 27 m L-band STAR sensor to evaluate the band-slicing technique. The results show that with 4 subband channels, BDC improves swath edge resolution from 17.0 to 10.2 km and reduces correlation loss from 2.5 to 0.2 dB.

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Section: B Fringe Washing Measurementssupporting

confidence: 74%

“…For example, the Helsinki University of Technology is implementing a 36-element digital airborne STAR array, named HUT-2D [5]. Similarly, the European Space Agency (ESA) is currently in Phase B development of an 80-element, Y-shaped satellite array for its soil moisture and ocean salinity (SMOS) mission [6], [7].…”

Section: Introductionmentioning

confidence: 99%