Low Latency DESDynl Data Products for Disaster Response, Resource Management and Other Applications

摘要

We are developing onboard processor technology targeted at the L-band SAR instrument onboard the planned DESDynl mission to enable formation of SAR images onboard opening possibilities for near-real-time data products to augment full data streams. Several image processing and/or interpretation techniques are being explored as possible direct-broadcast products for use by agencies in need of low-latency data, responsible for disaster mitigation and assessment, resource management, agricultural development, shipping, etc Data collected through UAVSAR (L-band) serves as surrogate to the future DESDynl instrument We have explored surface water extent as a tool for flooding response, and disturbance images on polarimetric backscatter of repeat pass imagery potentially useful for structural collapse (earthquake), mud/land/debris-slides etc We have also explored building vegetation and snow/ice classifiers, via support vector machines utilizing quad-pol backscatter, cross-pol phase, and a number of derivatives (radar vegetation index, dielectric estimates, etc). We share our qualitative and quantitative results thus far.