Title :
MISR global data products: a new approach
Author :
Braverman, Amy ; Di Girolamo, Larry
Author_Institution :
Jet Propulsion Lab., Pasadena, CA, USA
fDate :
7/1/2002 12:00:00 AM
Abstract :
Describes a new type of global, gridded product being created by the Multi-angle Imaging SpectroRadiometer (MISR) team. The product is a compressed version, or summary, of MISR geophysical data products on a 1° monthly global grid. Data belonging to each grid cell are summarized by a multivariate histogram. The numbers, sizes, and shapes of the histogram bins vary among cells, and they adapt to the shape of the data in high-dimensional space. Also, bin representatives are means rather than midpoints. These modifications allow data to be summarized parsimoniously and with lower error than is possible using customary, simple, descriptive statistics. The method is demonstrated by compressing test MISR aerosol data, and performance is assessed by comparing computations using compressed data with those using the original.
Keywords :
aerosols; radiometers; remote sensing; Level 3 products; MISR global data products; Multi-angle Imaging SpectroRadiometer; aerosol data; clustering algorithms; compressed data; data compression; datasets; entropy-constrained vector quantization; error statistics; geophysical data; method; monthly global grid; multivariate histogram; Aerosols; Error analysis; Histograms; Instruments; Laboratories; Propulsion; Shape; Spectroradiometers; Statistical distributions; Testing;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
DOI :
10.1109/TGRS.2002.801159