1 / 10

Module 5: MODIS Non-Veg Land Products Radiation Budget Variables Surface Reflectance

Module 5: MODIS Non-Veg Land Products Radiation Budget Variables Surface Reflectance Land Surface Temperature (LST) and Emissivity Snow and Ice Cover Bi-directional Reflection (BRDF) and Albedo Thermal Anomolies (Fire). Available Resolutions.

oakley
Download Presentation

Module 5: MODIS Non-Veg Land Products Radiation Budget Variables Surface Reflectance

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. Module 5: MODIS Non-Veg Land Products Radiation Budget Variables Surface Reflectance Land Surface Temperature (LST) and Emissivity Snow and Ice Cover Bi-directional Reflection (BRDF) and Albedo Thermal Anomolies (Fire)

  2. Available Resolutions Product Spatial Resolution Temporal Resolution Reflectances 250m, 500m, 1km daily (L2), 8-day (L3) Snow Cover 500m daily, 8-day, monthly Fire and Thermal 1km daily, 8-day Land Surface Temp 1km daily, 8-day Albedo 1km daily, 8-day

  3. Land Surface Reflectances • Mostly serve as inputs to higher level biophysical products. • - vegetation indices, snow/ice, FPAR/LAI • Atmospheric Correction Applied • - atmospheric gases, aerosols, and cirrus clouds • - applied to all cloud free pixels • Corrected view and illumination angle effects • Pixel Overlap (Level 3) - “Best” pixel in overlap areas is kept • Gridded/Projected (Level 3)

  4. Global Composite Map of Nadir BRDF-Adjusted Reflectance (NBAR) April 7–22 2001 True color, MODIS Bands 2, 4, 3 10 km resolution, Hammer-Aitoff projection, produced by MODIS BRDF/Albedo Team MODLAND/Strahler et al.

  5. Land Surface Reflectances Chesapeake Bay, USA - March 26, 2000 645 nm (red), 555 nm (green), 469 nm (blue) 250 m red band 1km AVHRR

  6. Snow and Ice Cover MODIS 8-day composite March 15-22, 2000 white = snow green = land gray = clouds red line = “average” March snow line* yellow line = “average” February snow line*

  7. Snow and Ice Cover • Product Resolution • Global, 500m cell size • Daily • 8 day composite - any day with snow tags a pixel as having snow • - statistics include persistence and duration of snow cover

  8. Normalized Difference Snow Index • Pixel > 50% snow cover mapped if: • NDSI > 0.4 and band 2 reflectance gt 11% • Additional criteria for dense forests using NDVI • MODIS Cloud Mask used

  9. Fire and Thermal Anomolies Absolute Fire Detection: 1. T4 > 360K OR 2. T4 > 320K and T4-T11 > 20K Relative To Background Pixels: 1. T4 > mean(T4) + 4 StdDev(T4) AND 2. T4-T11 > median(T4-T11) + 4 StdDev(T4-T11)

More Related