MODIS/Terra Gap-Filled, Smoothed NDVI 8-Day L4 250m SIN Grid

The MODIS/Terra Gap-Filled, Smoothed NDVI 8-Day L4 250m SIN Grid product, with short-name MOD09Q1G_NDVI is calculated from MODIS surface reflectance products (MOD09), at 250-m resolution. MODIS time series contains occasional lower quality data, gaps from persistent clouds, cloud contamination, and other gaps. Many modeling efforts, such as those used in NACP, that use MODIS data as input, require gap-free data. The procedure contains two algorithm stages, one for smoothing and one for gap filling, which attempt to maximize the use of high-quality data to replace missing or poor-quality observations.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated November 5, 2026, 06:18 (UTC)
Created April 1, 2025, 17:42 (UTC)
Identifier 10.5067/MODIS/MOD09Q1G_NDVI.006
Modified 2026-11-02T22:15:58Z
Theme {"Earth Science"}
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 6b0222c7-c7c5-4514-a707-b0a054b3265d
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
license https://www.usa.gov/government-works
programCode {026:000}
publisher NASA/GSFC/SED/ESD/HBSL/BISB/LAADS
resource-type Dataset
source_datajson_identifier true
source_hash 6e3dbfb654c559afe9eca923904686c280366a14b52b56cd2c020fef5abf0905
source_schema_version 1.1
spatial ["CARTESIAN", [{"NorthBoundingCoordinate": 90, "WestBoundingCoordinate": -180, "EastBoundingCoordinate": 180, "SouthBoundingCoordinate": -90}]]
temporal 2001-01-01/2026-11-02