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What is included in the mod21 product?

The MOD21 product will include a swath (scene) Level-2 daily product, and daily and eight-day Level 3 gridded products in sinusoidal projection.

What is the mod21 algorithm?

The MOD21 algorithm is based on the ASTER Temperature Emissivity Separation (TES) algorithm, which uses full radiative transfer simulations for the atmospheric correction, and an emissivity model based on the variability in the surface radiance data to dynamically retrieve both LST and spectral emissivity.

How accurate is the mod21 product?

Simulations and validation results available in the ATBD have shown consistent accuracies at the 1 K level over all land surface types including vegetation, water, and deserts. The MOD21 product will include a swath (scene) Level-2 daily product, and daily and eight-day Level 3 gridded products in sinusoidal projection.

What is the cold bias of mod21?

The MOD21 product addresses the documented cold bias of 3-5 K in the MOD11 heritage split-window products over arid and semi-arid regions.


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