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Description

The MOD09Q1 Version 6.1 product provides an estimate of the surface spectral reflectance of Terra Moderate Resolution Imaging Spectroradiometer (MODIS) Bands 1 and 2, corrected for atmospheric conditions such as gasses, aerosols, and Rayleigh scattering. Provided along with the 250 meter (m) surface reflectance bands are two quality layers. 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
250 Meters x 250 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
c2343112831-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 250m SIN Grid V061 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MOD09Q1.061 Date Accessed: 2025-08-30

Data Center Citation

Eric Vermote . 2021. MODIS/Terra Surface Reflectance 8-Day L3 Global 250m SIN Grid V061 . Sioux Falls, South Dakota, USA: NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MOD09Q1.061.

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
Monitoring and predicting temporal changes of Urmia Lake and its basin using satellite multi-sensor data and deep-learning algorithms Radman, A.
Potential microbial enzyme activity in seasonal snowpack is high and reveals P limitation Hoffman, A. S.
Daily spatial complete soil moisture mapping over southeast China using CYGNSS and MODIS data Yang, T.
Seeing the locust in the swarm—Accounting for spatiotemporal hierarchy improves ecological models of insect populations Lawton, D.
Effect of tillage and crop type on soil respiration in a long-term field experiment on chernozem soil under temperate climate Gelybó, G.
Energy and physiological tolerance explain multi‐trophic soil diversity in temperate mountains Calderón‐Sanou, I.
HydroSat—Geometric quantities of the global water cycle from geodetic satellites Tourian, M. J.
Satellite data track spatial and temporal declines in European beech forest canopy characteristics associated with intense drought events in the Rhon Biosphere Reserve, central Germany West, E.
Crop-specific phenomapping by fusing Landsat and Sentinel data with MODIS time series Schreier, J.
Simultaneous corn and soybean yield prediction from remote sensing data using deep transfer learning Khaki, S.
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