SARvatore for CS-2

The processor prototype is versatile in the sense that the users can customize and adapt the processing, according to their specific requirements, by setting a list of configurable options. The configurable options are divided according to the processing level they refer to (L1b and L2). Here, you find them listed with a basic description of their significance.

L1b Processing Options:

L2 Processing Options:

Adopted Conventions

• The Reference Time for the TAI Datation is 01/01/2000 00:00:00
• The Vertical Datum for altitude reference is the WGS84 Ellipsoid
• The Curve Best-Fitting Scheme, used in the re-tracking stage, is a Bounded Levenberg-Marquardt Least-Squares Estimation Algorithm (LEVMAR-LSE).
• The SAR Power Return Waveform Model, used in the re-tracking stage, is the SAMOSA Model (REF3)
• Static bias has been applied to the range, sigma nought and antenna mispointing measurements. The values of the static biases are reported in the output NetCDF data products.
• The orbital altitude has been corrected for a Time Tag Bias. The value of the applied time tag bias is reported in the output NetCDF data products.
• The measurements are posted both at rate of 20 Hz/80 Hz and of 1 Hz.
• The sea state bias correction has not been applied to the sea level anomaly estimates.
• All the default geophysical path corrections are from the CryoSat-2 FBR products; refer to CryoSat-2 mission handbook to know the exact source of these corrections
• No a priori data editing has been applied to the 20 Hz/80 Hz measurements.
• The misfit between SAR Waveform Model and SAR Waveform Data has been computed as:

sqrt( 1/128*sum(residual)^2 )*100

where residuals are the differences between model’s waveform power and data’s waveform power, normalized for the waveform power’s maximum value.