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Description

The Moderate Resolution Imaging Spectroradiometer (MODIS) Terra MOD09A1 Version 6.1 product provides an estimate of the surface spectral reflectance of Terra MODIS Bands 1 through 7 corrected for atmospheric conditions such as gasses, aerosols, and Rayleigh scattering. Along with the seven 500 meter (m) reflectance bands are two quality layers and four observation bands. For each pixel, a value is selected from all the acquisitions within the 8-day composite period. The criteria for the pixel choice include cloud and solar zenith. When several acquisitions meet the criteria the pixel with the minimum channel 3 (blue) value is used.

Known Issues

Improvements/Changes from Previous Versions

  • The Version 6.1 Level-1B (L1B) products have been improved by undergoing various calibration changes that include: changes to the response-versus-scan angle (RVS) approach that affects reflectance bands for Aqua and Terra MODIS, corrections to adjust for the optical crosstalk in Terra MODIS infrared (IR) bands, and corrections to the Terra MODIS forward look-up table (LUT) update for the period 2012 - 2017.
  • A polarization correction has been applied to the L1B Reflective Solar Bands (RSB).

Product Summary

Platforms
Terra
Instruments
MODIS
Spatial Extent
N: 90 S: -90 E: 180 W: -180
Spatial Resolution
500 Meters x 500 Meters
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2000-02-18 to Present
Temporal Resolution
8 Day
Data Partner
Land Processes Distributed Active Archive Center (LP DAAC)
MODIS Adaptive Processing System, Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/MODAPS)
Concept ID
c2343111356-lpcloud
Data State
ACTIVE
Processing Level
3
Published
Updated

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Vermote, E. (2021). MODIS/Terra Surface Reflectance 8-Day L3 Global 500m SIN Grid V061 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MOD09A1.061 Date Accessed: 2025-08-30

Data Center Citation

Eric Vermote . 2021. MODIS/Terra Surface Reflectance 8-Day L3 Global 500m SIN Grid V061 . Sioux Falls, South Dakota, USA: NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MOD09A1.061.

Documents

USER'S GUIDE

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)

PRODUCT QUALITY ASSESSMENT

SCIENCE DATA PRODUCT VALIDATION

GENERAL DOCUMENTATION

Learning Resources

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Publications Citing This Dataset

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Title Year Author
Evaluation of land surface phenology for autumn leaf color change based on citizen reports across Japan Tsutsumida, N.
Uncovering current pyroregions in Italy using wildfire metrics Elia, M.
Convolution neural network with edge structure loss for spatiotemporal remote sensing image fusion Lei, D. J.
Climatic drivers of the complex phenology of the Mediterranean semi-deciduous shrub phlomis fruticosa based on satellite-derived EVI Kyparissis, A.
An integration method to improve the quality of global land cover Qian, X. Y.
Datasets of land use change and flood dynamics in the Vietnamese Mekong Delta Vu, H. T. D.
A global 0.05 degrees dataset for gross primary production of sunlit and shaded vegetation canopies from 1992 to 2020 Bi, W. J.
Biophysical impact of sunflower crop rotation on agricultural fields Kussul, N.
Coupling relationship of urban development and the eco-environment in Guanzhong Region, China Wang, J.
Phenological piecewise modelling is more conducive than whole-season modelling to winter wheat yield estimation based on remote sensing data Huang, X.
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