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S-NPP VIIRS: Evaluation of ACSPO and NAVO L2P SST

S-NPP VIIRS: Evaluation of ACSPO and NAVO L2P SST. Sasha Ignatov, Yury Kihai, Boris Petrenko, Prasanjit Dash, John Sapper. Background and Objective. Currently, two L2P SST products from S-NPP VIIRS are generated: NAVO and ACSPO This documents evaluates and compares both products.

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S-NPP VIIRS: Evaluation of ACSPO and NAVO L2P SST

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  1. S-NPP VIIRS: Evaluation of ACSPO and NAVO L2P SST Sasha Ignatov, Yury Kihai, Boris Petrenko, Prasanjit Dash, John Sapper ACSPO vs. NAVO

  2. Background and Objective Currently, two L2P SST products from S-NPP VIIRS are generated: • NAVO and ACSPO • This documents evaluates and compares both products ACSPO vs. NAVO

  3. Daily histograms of VIIRS SST-CMC (01/18/2014) Night ACSPO NAVO Day NAVO produces less pixels than ACSPO on both cold and warm sides of histograms 17 March 2014 ACSPO vs. NAVO ACSPO vs. NAVO 3

  4. Daily coverage (maps of VIIRS SST-CMC for 01/18/2014) NAVO, Day ACSPO, Day NAVO, Night ACSPO, Night NAVO produces quality pixels within ± 52⁰ off nadir ACSPO produces quality pixels within full VIIRS swath (± 70⁰) 17 March 2014 ACSPO vs. NAVO ACSPO vs. NAVO 4

  5. Indian ocean, Day, 01/18/2014 NAVO ACSPO ACSPO vs. NAVO

  6. South Atlantic ocean, Day, 01/18/2014 ACSPO vs. NAVO

  7. South Atlantic, Day, 01/18/2014 NAVO ACSPO ACSPO provides more SST detail with wider coverage ACSPO vs. NAVO

  8. Indian ocean, Night, 01/18/2014 NAVO ACSPO ACSPO provides more SST detail with wider coverage ACSPO vs. NAVO

  9. South Pacific, Day, 01/18/2014 NAVO ACSPO ACSPO provides more SST detail with wider coverage ACSPO vs. NAVO

  10. Mozambique channel, Night, 01/18/2014 NAVO ACSPO ACSPO provides more SST detail with wider coverage ACSPO vs. NAVO

  11. Tropical Atlantic, Day, 01/18/2014 NAVO ACSPO NAVO mask produces geometrical artifacts ACSPO vs. NAVO

  12. Atlantic ocean near Florida, Day, 01/18/2014 NAVO ACSPO Geometrical artifacts and hidden thermal fronts in NAVO SST ACSPO vs. NAVO

  13. West Australian coast, NAVO, Night, 01/18/2014 SST fronts are hidden Coastlines are hidden ACSPO vs. NAVO

  14. West Australian coast, ACSPO, Night, 01/18/2014 ACSPO spatial resolution is higher than in NAVO (ACSPO – 1 pixel , NAVO – 2×2 pixels) Cf. with previous slide ACSPO vs. NAVO

  15. Indian coast, NAVO, Night, 01/18/2014 SST fronts are hidden Coastlines are hidden ACSPO vs. NAVO

  16. Indian coast, ACSPO, Night, 01/18/2014 ACSPO spatial resolution is higher than in NAVO (ACSPO – 1 pixel , NAVO – 2×2 pixels) Cf. with previous slide ACSPO vs. NAVO

  17. East China sea, Day, 01/18/2014 NAVO ACSPO ACSPO provides more SST detail with wider coverage ACSPO vs. NAVO

  18. East China sea, Day, 01/18/2014, no cloud mask (same area as on previous slide) NAVO ACSPO NAVO does not process pixels hidden by cloud mask, fills them with NaNs ACSPO retrieves SST in all ocean pixels, leaving a chance to override the cloud mask ACSPO vs. NAVO

  19. West Australian coast, NAVO, Night, 01/18/2014 Striping is noticeable in NAVO CCT and cloud mask ACSPO vs. NAVO

  20. West Australian coast, ACSPO, Night, 01/18/2014 ACSPO has a destriping capability – no horizontal stripes, cf. with previous slide ACSPO vs. NAVO

  21. Atlantic near Haiti, NAVO, Day, 01/18/2014 Another example of striping in NAVO SST ACSPO vs. NAVO

  22. Atlantic near Haiti, NAVO, Day, 01/18/2014 Destriped ACSPO SST image (cf. with previous slide) ACSPO vs. NAVO

  23. ACSPO vs. NAVO

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  45. ACSPO vs. NAVO

  46. ACSPO Ice (CMC) Scandinavia 17 March 2014 ACSPO vs. NAVO ACSPO vs. NAVO 46

  47. NAVO Scandinavia ACSPO vs. NAVO

  48. ACSPO Africa ACSPO vs. NAVO

  49. NAVO Africa ACSPO vs. NAVO

  50. ACSPO New Zealand ACSPO vs. NAVO

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