An analytical nonephemeris algorithm for MODIS bowtie removal

Peng Du; Chuang Liu; Long Ma

doi:10.1117/12.565309

10 November 2004 An analytical nonephemeris algorithm for MODIS bowtie removal

Peng Du, Chuang Liu, Long Ma

Proceedings Volume 5573, Image and Signal Processing for Remote Sensing X; (2004) https://doi.org/10.1117/12.565309
Event: Remote Sensing, 2004, Maspalomas, Canary Islands, Spain

Abstract

In order to remove MODIS bowtie effect, an analytical algorithm is proposed, which is based on solid geometry projection and requires no ephemeris information. The geometry projection model is established from the parameters of MODIS platform and the amount of overlapping pixels is quantified as a function of the instantaneous scanning angle. Lookup table is utilized to guide the deletion of overlapping pixels and improve efficiency, and cubic spline interpolation is applied to subpixelly restore data following their profile. Resampling is followed to generate integral pixel coordinates. The border incontinuity problem that occurs due to the gap between different swaths is solved by introducing of a special blocking method. The validity of out algorithm is verified by comparing with three other Non-ephemeris algorithms, and the result shows that not only the bowtie effect within a single swath is effectively removed, the incontinuity caused by conventional pixel grouping method is mostly well eliminated.

Citation Download Citation

Peng Du, Chuang Liu, and Long Ma "An analytical nonephemeris algorithm for MODIS bowtie removal", Proc. SPIE 5573, Image and Signal Processing for Remote Sensing X, (10 November 2004); https://doi.org/10.1117/12.565309

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