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Multiple-input multiple-output synthetic aperture radar (MIMO SAR) system has drawn considerable attention for its wider detected swath without decreasing PRF compared to the traditional multichannel synthetic aperture radar (MC-SAR) system. For MIMO SAR system, how to extract the matched signal or suppress the unmatched interferences is the foremost task. Using the OFDM chirp signals as the transmitted...
Lake surface temperature (LST) is a significant indicator of lake physical states and energy fluxes. This paper integrates multi-dates Landsat 8 thermal data with extensive in situ measurements to retrieve LST of Alaska lakes, and analyses temperature patterns across spatial scales, intra and inter-lakes. Our analysis shows that inside a lake, LST is relatively homogeneous and largely isothermal under...
Unreliability involved in the extraction of shaded vegetation-covered surfaces (VS) is a common problem in urban vegetation mapping. Serving as a solution to it, a novel method named Nonlinear Fitting-based Seeded Region Growing (NFSRG) is explored. With NFSRG, a series of classified results are organized by a seeded-region-growing process. In order to adapt to the variable separability between VS...
This paper explores the feasibility of extracting summer maize using the MODIS EVI time series imagery in Huang-Huai-Hai. We first obtained the spatial distribution of double-season crops based on three-temporal EVI imagery, and then the phenology calendar curves was generated based on the EVI seasonal variation in selected training areas of Huang-Huai-Hai. This curve can be served as a key parameter...
Crop planting area is significant to agricultural structure adjustment and regional food balance policy. Based on field investigation and spectral property analysis of corn in HJ1-CCD images, different threshold configurations are set to build decision trees and corn planting area is precisely extracted utilizing multi-temporal HJ-1 CCD images in Zhecheng county, Henan Province of China. Both statistical...
Understanding of the pattern of agricultural drought and the way it responses to climate change in winter wheat growth season is critical for crop production in China. The remotely sensed MSAVI and NDWI time series and daily meteorological elements for the main growth season and four separate growth stages of winter wheat from 2000 to 2010 were used to analyze the temporal and spatial distribution...
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