Processing and Tools
Cleaning and processing the original Seasat telemetry data presented challenges ranging from bit rot and data discontinuities to conflicting time records. Each step involved writing new software. When the telemetry data filtering was finished in the spring of 2013, 1,346 raw Seasat swaths were ready to be processed into SAR image products. Engineers then turned their attention to the processing itself, and released beta products to commemorate the 35th anniversary of Seasat’s launch.
The following pages give an overview of the raw data preparation or pre-processing, image processing and product packaging. It is important to note that several data quality issues do exist in the resulting products — including imprecise geolocations and some image anomalies. There are some visualization tools that work with ASF's Seasat HDF5 products. Links throughout this overview take users to more detailed descriptions within the Processing Challenges section.