ISOCAM Interactive Analysis User's Manual Version 5.0 - ISO - ESA

236 CHAPTER 20. ADVANCED DATA CALIBRATION
1. method=‘fs’
method: This method uses a fitting technique based on the Fouks-Schubert model. It is
best used on an SSCD – see Section 20.3 for an example.
There are three different implementations of this algorithm: an IDL version, a Fortran
version and a C++ version. To use the IDL or Fortran version set the stabilize
keyword /idl or /fortran.
Some points to note about these different implementations:
• The IDL version does not work well with irregularly gridded data, as can occur
in the pixel history if a glitched pixel is recorded by the complex MASK. Consequently
it is recommended to only use the simple MASK with the IDL version.
See Section 2.3.4 for configuring the MASK.
• The Fortran and C++ versions can handle irregularly gridded data. In this case
both MASK settings are fine, though the complex MASK is recommended as it
correctly indicates that glitched pixels should be ignored.
routine called: corr transient fouks
PDS side effects: Unstable pixels are flagged in .MASK and .CUBE is modified.
reference: Coulais A. and Abergel A., 2000
2. method=‘s90’
method: Pixels which have not achieved 90% of their stable values are masked. This is
the default stabilization method.
routine called: corr transient s90
PDS side effects: Unstable pixels are flagged in .MASK and .CUBE remains unmodified.
reference: ISOCAM Handbook, Chapter Data processing methods, Section Find the first
stabilized pixel at each position without using a model.
3. method=‘m90’
method: This method applies a model to find the first stabilized pixel at each STATE.
Pixels which have not achieved 90% of their stable values are masked.
routine called: corr transient m90
PDS side effects: Unstable pixels are flagged in .MASK and .CUBE remains unmodified.
reference: ISOCAM Handbook, Chapter Data processing methods, Section Find the first
stabilized pixel at each position using a model.
4. method=‘inv’
method: This method uses a fitting technique called the IAS or INVERSION Model.
This method is one of the more successful fitting methods.
routine called: corr transient inv
PDS side effects: Unstable pixels are flagged in .MASK and .CUBE is modified.
reference: ISOCAM Handbook, Chapter Data processing methods, Section Simplified
model of the CAM LW response.