—Due to the harsh conditions of space, the detectors within satellite-based multispectral imagers are always at risk of damage or failure. In particular, 15 out of the 20 detectors that produce the 1.6-µm band 6 of Moderate Resolution Imaging Spectroradiometer (MODIS) on Aqua are either dead or noisy. In this paper, we describe a quantitative image… (More)
(MODIS)-based snow mask product critically uses 1.6 μm band 6. The snow mask algorithm for MODIS on Aqua has been adapted to use the 2.1 μm band 7, since some of Aqua's MODIS detectors are nonfunctional. We have previously introduced an algorithm for quantitative image restoration (QIR) that can restore missing pixels or scan lines, using multilinear… (More)
In this paper we consider the problem of constructing a waveform with globally optimal ambiguity surface properties in a region surrounding the main lobe. We consider Hermite waveforms as the basis functions of our construction algorithm and discuss the problem of minimizing the volume under the ambiguity surface over a certain given region. In the case of… (More)
In this paper we extend Wilcox's classical results to the case of subregions of R 2. This generalization enables us to construct many promising new waveforms with desired ambiguity profiles in the regions being considered.
Deltas are highly sensitive to increasing risks arising from local human activities, land subsidence, regional water management, global sea-level rise, and climate extremes. We quantified changing flood risk due to extreme events through an integrated set of global environmental, geophysical, and social indicators. Although risks are distributed across all… (More)
In this paper, which is part of an ongoing sequence of papers devoted to the subject of efficient noise-tolerant lossless compression of satellite data for transmission, we describe an algorithm for this purpose which effectively addresses the above criteria. Our algorithm exhibit the potential to achieve noise-tolerant compression ratios averaging 3.2 : 1.… (More)
—The algorithms for estimating snow extent for the Moderate Resolution Imaging Spectroradiometer (MODIS) optimally use the 1.6-µm channel which is unavailable for MODIS on Aqua due to detector damage. As a test bed to demonstrate that Aqua band 6 can be restored, we chose the area surrounding Yellowstone and Grand Teton national parks. In such rugged and… (More)
As new instruments are developed, it is becoming clear that our ability to generate data is rapidly outstripping our ability to transmit this data. The Advanced Baseline Imager (ABI), that is currently being developed as the future imager on the Geostationary Environmental Satellite (GOES-R) series, will offer more spectral bands, higher spatial resolution,… (More)
The detection and monitoring of harmful algal blooms using in-situ field measurements is both labor intensive and is practically limited on achievable temporal and spatial resolutions, since field measurements are typically carried out at a series of discrete points and at discrete times, with practical limitations on temporal continuity. The planning and… (More)
In this paper, we extend our modification of the Wilcox waveform approximation technique  to the case of prolate spheroidal wave functions. We have previously carried out a corresponding analysis in the case of Hermite waveforms [3, 4].