- To provide a 28-year time series of microwave backscatter to support analysis of patterns and trends in growth of global urban building infrastructure.
- The Global Monthly and Seasonal Urban and Land Backscatter Time Series, 1993-2020, is a multi-sensor, multi-decadal, data set of global microwave backscatter, for 1993 to 2020. It assembles data from C-band sensors onboard the European Remote Sensing Satellites (ERS-1 and ERS-2) covering 1993-2000, Advanced Scatterometer (ASCAT) onboard EUMETSAT satellites for 2007-2020, and the Ku-band sensor onboard the QuikSCAT satellite for 1999-2009, onto a common spatial grid (0.05 degree latitude /longitude resolution) and time step (both monthly and seasonal). Data are provided for all land (except high latitudes and islands), and for urban grid cells, based on a specific masking that removes grid cells with > 50% open water or < 20% built land. The all-land data allows users to choose and evaluate other urban masks. There is an offset between C-band and Ku-band backscatter from both vegetated and urban surfaces that is not spatially constant. There is a strong linear correlation (overall R-squared value = 0.69) between 2015 ASCAT urban backscatter and a continental-scale gridded product of building volume, across 8,450 urban grid cells (0.05 degree resolution) from large cities in Europe, China, and the United States.
- Recommended Citation(s)*:
Frolking, S., T. Milliman, R. Mahtta, A. Paget, D. G. Long, and K. C. Seto. 2022. Global Monthly and Seasonal Urban and Land Backscatter Time Series, 1993-2020. Palisades, New York: NASA Socioeconomic Data and Applications Center (SEDAC). https://doi.org/10.7927/gr2e-dh86. Accessed DAY MONTH YEAR.
Frolking, S., T. Milliman, R. Mahtta, A. Paget, D. G. Long, and K. C. Seto. 2022. A Global Urban Microwave Backscatter Time Series Data Set for 1993-2020 Using ERS, QuikSCAT, and ASCAT Data. Scientific Data 9: 88. https://doi.org/10.1038/s41597-022-01193-w.
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