1 / 20

MODIS Data Product Status Numbers 19, 23, & 26

This report outlines the status and calibration results of several MODIS Terra products, focusing on the parameters related to chlorophyll and total suspended matter. Key products include MOD 19 (CZCS pigment), MOD 23 (total suspended matter), and MOD 26 (K_490 diffuse attenuation coefficient). It presents regression analysis results, with R² values exceeding 0.91. The ongoing validation efforts and their timeline, particularly for December 2000 observations, are discussed, including improvements from recent calibration results and the potential for future validations.

roland
Télécharger la présentation

MODIS Data Product Status Numbers 19, 23, & 26

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. MODIS Data Product StatusNumbers 19, 23, & 26 Dennis K Clark 18 December 2001

  2. MODIS Terra-Product Status • Product 19 • Parameter 13 - CZCS_pigment • (Chl a +Phaeo) Fl determined • Parameter 14 - chlor_MODIS • (Chl a (monovinyl and divinyl), Chl a allomer, Chl a epimer, and chlorophyllide a) - HPLC determined • Parameter 15 - pigment_c1_total • (Chl a + 27 Accessory Pigments) - HPLC determined

  3. Product Status cont’d • Product 23 • Parameter 19 - Total Suspended Matter • Dry Weight • Product 26 • Parameter 23 - K_490 • SeaWiFS - Downwelled Irradiance Diffuse Attenuation Coefficient

  4. Computational Forms • Products 19 and 23 • Least Squares Regressions (Log, Log) • 3rd order polynomials • R2 > 0.91 Syx ~ .045 • Product 26 • Least Squares Regression • Linear • R2 = 0.94 Syx = 0.167

  5. Generalized form for product computation Log Product = A(Log X)3 + B(Log X)2 + C(Log X) + D) / E Where: A,B,C,D are least squares regression coefficients, E is a constant for offsetting the derived relationship (presently set to 1), X = [ (e) nLw (band 9) + (f) nLw (band 10) + (g) nLw (band 11)] / nLw (band 12), The wavelength bands 9, 10, 11, & 12 are centered at 442, 487, 530, & 547 nm, respectively. e, f, and g are set to zero or one to select band combinations, nLw = MODIS total band solar normalized water-leaving radiance.

  6. Station location map for the observations used in development of these products.

  7. CZCS_pigment - MODIS total band normalized water-leaving radiance ratios vs fluorometrically determined pigment concentrations (mg/m3) with regression lines for case 1 waters (blue) and case 1 & 2 (green) waters.

  8. Product Number - MOD 19Parameter 13, CZCS_pigmentDay 345, 2000

  9. Product Number - MOD 19Parameter 14, chlor_MODIS Day 345, 2000

  10. Product Number - MOD 19Parameter 15, pigment_cl_totalDay 345, 2000

  11. Product Number - MOD 23Parameter 19,Total Suspended MatterDay 345, 2000

  12. Product Number - MOD 26Parameter 23,K_490 Diffuse CoefficientDay 345, 2000

  13. Product Number - MOD 19Parameter 14, Chlor_MODISArabian Sea Dec. Chl (Day 336, 2000)

  14. MODIS Day 345 -Ship Track

  15. MODIS_CHL Retrievals - MOCE -7 along track Total chl a

  16. Percent Difference

  17. MODIS CZCS_pigment - MOCE-7 along-track pigments

  18. Percent Difference

  19. Calibration State Version 3.1.4

  20. Present Status - Future Validation • Present products invalid with the exception of ~ 2-3 weeks in December 2000 • Recent Miami calibration results solve most of the major nLw problems • These products could be validated within 30 days once the nLw’s are considered validated.

More Related