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Description

The MOD13C1 Version 6 data product was decommissioned on July 31, 2023. Users are encouraged to use the MOD13C1 Version 6.1 data product.

The MOD13C1 Version 6 product provides a Vegetation Index (VI) value at a per pixel basis. There are two primary vegetation layers. The first is the Normalized Difference Vegetation Index (NDVI) which is referred to as the continuity index to the existing National Oceanic and Atmospheric Administration-Advanced Very High Resolution Radiometer (NOAA-AVHRR) derived NDVI. The second vegetation layer is the Enhanced Vegetation Index (EVI), which has improved sensitivity over high biomass regions.

The Climate Modeling Grid (CMG) consists 3,600 rows and 7,200 columns of 5,600 meter (m) pixels. Global MOD13C1 data are cloud-free spatial composites of the gridded 16-day 1 kilometer MOD13A2 data, and are provided as a Level 3 product projected on a 0.05 degree (5,600 m) geographic CMG. The MOD13C1 has data fields for NDVI, EVI, VI QA, reflectance data, angular information, and spatial statistics such as mean, standard deviation, and number of used input pixels at the 0.05 degree CMG resolution.

Known Issues

  • The incorrect representation of the aerosol quantities (low, average, high) in the Collection 6 MOD09 surface reflectance products may have impacted MOD13 Vegetation Index data products particularly over arid bright surfaces.
  • Corrections were implemented in Collection 6.1 reprocessing.
  • For complete information about known issues please refer to the MODIS/VIIRS Land Quality Assessment website.

Improvements/Changes from Previous Versions

  • The 16-day composite VI is generated using the two 8-day composite surface reflectance granules (MOD09A1) in the 16-day period.
  • This surface reflectance input is based on the minimum blue compositing approach used to generate the 8-day surface reflectance product.
  • The product format is consistent with the Version 5 product generated using the Level 2 gridded daily surface reflectance product.
  • A frequently updated long-term global CMG Average Vegetation Index product database is used to fill the gaps in the CMG product suite.

Version Description

The MOD13C1 Version 6 data product was decommissioned on July 31, 2023. Users are encouraged to use the MOD13C1 Version 6.1 data product (https://doi.org/10.5067/MODIS/MOD13C1.061).

Product Summary

Platforms
Terra
Instruments
MODIS
Spatial Extent
N: 90 S: -90 E: 180 W: -180
Spatial Resolution
5600 Meters x 5600 Meters
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2000-02-18 to 2023-02-17
Temporal Resolution
16 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
C2763297277-LPCLOUD
Data State
DEPRECATED
Processing Level
3
Published
Updated
Science Keywords
Vegetation Index,
Normalized Difference Vegetation Index (NDVI)

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

Didan, K. (2015). MOD13C1 MODIS/Terra Vegetation Indices 16-Day L3 Global 0.05Deg CMG V006 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MOD13C1.006 Date Accessed: 2025-11-01

Documents

Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
CMG 0.05 Deg 16 days Avg sun zen angle View zenith angle of VI Pixel Degree int16 -10000 -10000 to 18000 0.01
CMG 0.05 Deg 16 days blue reflectance Surface Reflectance Band 3 N/A int16 -1000 -1000 to 10000 0.0001
CMG 0.05 Deg 16 days EVI 16 day EVI EVI int16 -3000 -3000 to 10000 0.0001
CMG 0.05 Deg 16 days EVI std dev Standard deviation computed from input EVI pixels EVI int16 -3000 -3000 to 10000 0.0001
CMG 0.05 Deg 16 days MIR reflectance Surface Reflectance Band 7 N/A int16 -1000 -1000 to 10000 0.0001
CMG 0.05 Deg 16 days NDVI 16 day NDVI NDVI int16 -3000 -3000 to 10000 0.0001
CMG 0.05 Deg 16 days NDVI std dev Standard deviation computed from input NDVI pixels NDVI int16 -3000 -3000 to 10000 0.0001
CMG 0.05 Deg 16 days NIR reflectance Surface Reflectance Band 2 N/A int16 -1000 -1000 to 10000 0.0001
CMG 0.05 Deg 16 days number of 1km pix +-30deg VZ Number of 1km pixels used with VZ angle less than + or - 30 degs Number uint8 255 255 to 36 N/A
CMG 0.05 Deg 16 days number of 1km pix used Number of 1 km input pixels used Number uint8 255 255 to 36 N/A
CMG 0.05 Deg 16 days pixel reliabilty Quality reliability of VI pixel Rank int8 -1 -1 to 4 N/A
CMG 0.05 Deg 16 days red reflectance Surface Reflectance Band 1 N/A int16 -1000 -1000 to 10000 0.0001
CMG 0.05 Deg 16 days VI Quality VI quality indicators Bit Field uint16 65535 65535 to 65534 N/A
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