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Phase corrections for the emission sounder MIPAS-FT
Applied Optics
|September 11, 2010
Summary
Airborne Fourier-transform infrared emission sounders like MIPAS-FT can have phase correction anomalies. Explicitly accounting for beam-splitter emission mathematically resolves these issues in data analysis.
Area of Science:
- Atmospheric science
- Spectroscopy
- Instrument calibration
Background:
- Airborne Fourier-transform infrared emission sounders (MIPAS-FT) are crucial for atmospheric measurements.
- Data processing of interferograms can introduce anomalies affecting measurement accuracy.
Purpose of the Study:
- To identify and resolve anomalies in the phase correction of MIPAS-FT data.
- To improve the accuracy of atmospheric emission soundings.
Main Methods:
- Complex Fourier transformation of two-sided interferograms.
- Mathematical modeling of beam-splitter emission.
Main Results:
- Observed strong anomalies in the correction phase of complex Fourier transformations.
- Successfully eliminated phase anomalies by incorporating beam-splitter emission into the model.
Conclusions:
- Beam-splitter emission is a critical factor in accurate interferogram processing.
- The mathematical description of beam-splitter emission enables precise phase correction for airborne infrared sounders.
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