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| Data: Ground Data System |
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- The ground system consists of the processing software and hardware to take the data collected from the UAVSAR and transform it into images and other higher level science products.
- The ground processing system is based on software developed for GeoSAR and a differential interferometry processing software package developed at JPL that is distributed as ROIPAC.
- The main technical challenges for the ground processor are:
- Motion processing of airborne repeat pass data.
- Current metrology for obtaining the relative aircraft positions between the two flight lines is limited to about 3-10 cm accuracy. Required accuracy for repeat pass processing is about or order of magnitude better. Must use the data itself to solve for residual baseline errors.
- Calibration and processing of data when the antenna is actively scanning. This will require new algorithms and data analysis techniques to compensate for any systematic changes in the antenna phase center or induced phase biases that are azimuth angle dependent.
- Software is designed to be production quality - however the processing hardware and the data production scripts developed on the UAVSAR program is only sufficient for meeting the processing requirements needed for testing, calibration and demonstrating the repeat pass science.
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