1 / 17

Destriping VIIRS visible bands (preliminary results)

Destriping VIIRS visible bands (preliminary results). Karlis Mikelsons Ocean Color Group Meeting May 30, 2014. Different kinds of striping. Minor d ifferences in detector calibration and sensitivity Small amplitude No direct relation with detector number Affects all bands

duane
Télécharger la présentation

Destriping VIIRS visible bands (preliminary results)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Destriping VIIRS visible bands(preliminary results) KarlisMikelsons Ocean Color Group Meeting May 30, 2014

  2. Different kinds of striping • Minor differences in detector calibration and sensitivity • Small amplitude • No direct relation with detector number • Affects all bands [M. Bouali, J. Atm. & Oc. Tech.31, 150] • Differences among detector azimuthal and zenith angles • Linear dependence on detector • Very strong near glint areas • Affects reflective bands [Q. Liu, J. Atm. & Oc. Tech. 30, 2478] • Differences in sensor mirror side (MODIS) • Alternating values for even – odd scans • Nearly same offset for all pixels within one scan • Most pronounced in MODIS blue bands A: VIIRS, nLw(672) C: MODIS, nLw(412) B: VIIRS, nLw(412)

  3. Results: nLw (412nm) [original data]

  4. Results: nLw (412nm) [destriped]

  5. Results: nLw (445nm)[original data]

  6. Results: nLw (445nm)[destriped]

  7. Results: nLw (488nm)[original data]

  8. Results: nLw (488nm) [destriped]

  9. Results: nLw (555nm)[original data]

  10. Results: nLw (555nm) [destriped]

  11. Results: nLw (672nm)[original data]

  12. Results: nLw (672nm) [destriped]

  13. Results: nLw (746nm)[original data]

  14. Results: nLw (746nm) [destriped]

  15. Results: nLw (865nm)[original data]

  16. Results: nLw (865nm) [destriped]

  17. Summary • Existing destriping algorithm still mostly works for larger amplitude saw-like striping in reflective bands • Saw-like striping in bow tie area may not be completely removed (striping might be reintroduced after remapping of coordinates) • Striping affects deletions of nLw data in 746 & 865 nm bands Things to do: • Adjust destriping parameters to optimal values • Test more examples in different conditions • Explore possibility of destriping of L1b reflectances directly • Destripe MODIS visible bands

More Related