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Description

The MOD09GA Version 6.1 product provides an estimate of the surface spectral reflectance of Terra Moderate Resolution Imaging Spectroradiometer (MODIS) Bands 1 through 7, corrected for atmospheric conditions such as gasses, aerosols, and Rayleigh scattering. Provided along with the 500 meter (m) surface reflectance, observation, and quality bands are a set of ten 1 kilometer (km) observation bands and geolocation flags. The reflectance layers from the MOD09GA are used as the source data for many of the MODIS land products.

Known Issues

Version Description

The following changes and improvements were implemented for inputs to MODIS Version 6.1 surface reflectance data products: (1) 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, and (2) A polarization correction has been applied to the L1B Reflective Solar Bands (RSB).

Product Summary

Platforms
Terra
Instruments
MODIS
Projects
TERRA
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Spatial Resolution
500 Meters x 500 Meters
1000 Meters x 1000 Meters
Spatial Reference System(s)
MODIS Sinusoidal Tiling System
Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2000-02-24 to Present
Temporal Resolution
1 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
C2202497474-LPCLOUD
Data State
ACTIVE
Number of Files/Granules
3042344
Processing Level
2G
Published
Updated
Science Keywords
Reflectance

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., & Wolfe, R. (2021). MODIS/Terra Surface Reflectance Daily L2G Global 1km and 500m SIN Grid V061 [Dataset]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MOD09GA.061 Date Accessed: 2026-06-19

File Naming Convention

MOD09GA.A2025219.h05v10.061.2025221031815.hdf

The file name begins with the Product Short Name (MOD09GA) followed by the Julian Date of Acquisition formatted as AYYYYDDD (A2025219), the Tile Identifier which is horizontal tile and vertical tile provided as hXXvYY (h05v10), the Version of the data collection (061), the Julian Date and Time of Production designated as YYYYDDDHHMMSS (2025221031815), and the Data Format (hdf).

Documents

USER'S GUIDE

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)

PRODUCT QUALITY ASSESSMENT

SCIENCE DATA PRODUCT VALIDATION

GENERAL DOCUMENTATION

Publications Citing This Dataset

Filters
Title Year Author Topic
Influence of Vegetation Phenology on the Temporal Effect of Crop Lin, Yinghao, Fan, Tingshun, Wang, Dong, Cai, Kun, Liu, Yang, Wang, Yuye, Yu, Tao, Xu, Nianxu Land Use/Land Cover Classification, Vegetation Index, Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI), Reflectance
Improvement of albedo and snow-cover simulation during snow events over the Tibetan Plateau Liu, Lian, Ma, Yaoming Reflectance
Incorporating changes in land surface temperature improves BESS Lu, Xiaoman, Guan, Kaiyu, Jiang, Chongya, Gao, Lun, Wang, Sheng, Zhang, Jiaying Albedo, Anisotropy, Fraction Of Absorbed Photosynthetically Active Radiation (fapar), Leaf Area Index (LAI), Precipitation, Precipitation Amount, Precipitation Rate, Snow, Rain, Leaf Characteristics, Photosynthetically Active Radiation, Reflectance
Drought influences habitat associations and abundances of birds in Goldstein, Benjamin R., Furnas, Brett J., Calhoun, Kendall L., Larsen, Ashley E., Karp, Daniel S., de Valpine, Perry Reflectance
Estimating the daily mean blue-sky land surface albedo on the Tibetan Plateau using convolutional neural network Ma, Bin, Ma, Yaoming, Ma, Weiqiang, Xie, Zhipeng, Han, Cunbo, Wang, Binbin Albedo, Anisotropy, Snow Cover, Aerosol Optical Depth/Thickness, Reflectance
Estimating broadband snow albedo by an asymptotic radiative transfer model-constrained deep learning models Shao, Donghang, Jin, Yuwei, Ji, Wenzheng, Li, Hongxing, Feng, Tianwen, Li, Hongyi, Wang, Jian, Hao, Xiaohua Land Use/Land Cover Classification, Reflectance, Albedo, Snow Cover
From EU-SoilHydroGrids to HU-SoilHydroGrids: A leap forward in soil hydraulic mapping Szabo, Brigitta, Meszaros, Janos, Laborczi, Annamaria, Takacs, Katalin, Szatmari, Gabor, Bakacsi, Zsofia, Mako, Andras, Pasztor, Laszlo Reflectance
Generation of 1 km high resolution Standardized precipitation evapotranspiration Index for drought monitoring over China using Google Earth Engine He, Yile, Xie, Youping, Liu, Junchen, Hu, Zengyun, Liu, Jun, Cheng, Yuhua, Zhang, Lei, Wang, Zhihui, Li, Man Reflectance
Evaluation of Summertime Passive Microwave and Reanalysis Sea-Ice Song, Kexin, Minnett, Peter J. Heat Flux, Heat Flux, Heat Flux, Heat Flux, Longwave Radiation, Longwave Radiation, Shortwave Radiation, Shortwave Radiation, Water Vapor Tendency, Water Vapor Flux, Cloud Dynamics, Cloud Microphysics, Snow/Ice, Precipitation, Specific Humidity, Ice Fraction, Skin Temperature, Sea Surface Skin Temperature, Skin Temperature, Reflectance, Brightness Temperature, Sea Ice Concentration, Sea Ice Motion, Snow Depth, Sea Ice Concentration, Snow Depth
Climatic Constraints of Spring Phenology and Its Variability on the Mongolian Plateau From 1982 to 2021 Yuan, Zhihui, Bao, Gang, Dorjsuren, Altantuya, Oyont, Ayisha, Chen, Jiquan, Li, Fei, Dong, Gang, Guo, Enliang, Shao, Changliang, Du, Lingtong Reflectance
Multi-decadal temporal reconstruction of Sentinel-3 OLCI-based D.Kovacs, David, Reyes-Munoz, Pablo, Berger, Katja, Meszaros, Viktor Ixion, Caballero, Gabriel, Verrelst, Jochem Leaf Characteristics, Photosynthetically Active Radiation, Leaf Area Index (LAI), Fraction Of Absorbed Photosynthetically Active Radiation (fapar), Reflectance
Multivariate analysis of land surface dynamics in Central Asia: patterns of trends and drivers under a changing climate Uereyen, Soner, Klein, Igor, Eisfelder, Christina, Kuenzer, Claudia Reflectance
On the importance of plant phenology in the evaporative process of a semi-arid woodland: could it be why satellite-based evaporation estimates in the ... Zimba, Henry M., Coenders-Gerrits, Miriam, Banda, Kawawa E., Hulsman, Petra, van de Giesen, Nick, Nyambe, Imasiku A., Savenije, Hubert H. G. Photosynthetically Active Radiation, Leaf Area Index (LAI), Leaf Characteristics, Fraction Of Absorbed Photosynthetically Active Radiation (fapar), Reflectance, Land Use/Land Cover Classification, Evapotranspiration, Latent Heat Flux, Terrain Elevation, Digital Elevation/Terrain Model (DEM), Topographical Relief Maps
Monitoring small-scale irrigation performance using remote sensing in the Upper Blue Nile Basin, Ethiopia Mekonnen, Yilkal Gebeyehu, Alamirew, Tena, Tadesse, Kassahun Birhanu, Chukalla, Abebe Demissie Reflectance
Megafire smoke exposure jeopardizes tree carbohydrate reserves and yield Orozco, Jessica, Guzman-Delgado, Paula, Zwieniecki, Maciej A. Reflectance, Aerosol Optical Depth/Thickness
Reducing Resolution Dependency of Dust Emission Modeling Using Chappell, Adrian, Hennen, Mark, Schepanski, Kerstin, Dhital, Saroj, Tong, Daniel Land Use/Land Cover Classification, Reflectance, Albedo, Anisotropy
Risk factors associated with heatwave mortality in Chinese adults over 65 years Xi, Di, Liu, Linxin, Zhang, Min, Huang, Cunrui, Burkart, Katrin G., Ebi, Kristie, Zeng, Yi, Ji, John S. Reflectance
The high spatial resolution Drought Response Index (HiDRI): An Xu, Zhenheng, Sun, Hao, Zhang, Tian, Xu, Huanyu, Wu, Dan, Gao, JinHua Reflectance, Land Surface Temperature, Emissivity
Tailoring the surface energy balance algorithm for land-improved (SEBALI) model using high-resolution land/use land cover for monitoring actual evapotranspiration Mekonnen, Yilkal Gebeyehu, Alamirew, Tena, Malede, Demelash Ademe, Pareeth, Sajid, Bantider, Amare, Chukalla, Abebe Demissie Reflectance, Land Use/Land Cover Classification
Spatially Interpolated CYGNSS Data Improve Downscaled 3 km SMAP/CYGNSS Wernicke, Liza J., Chew, Clara C., Small, Eric E. Reflectance, Brightness Temperature, SIGMA NAUGHT, Surface Soil Moisture, Radar Cross-Section, Radar Reflectivity, Flight Data Logs, Soil Moisture/Water Content, Soil Temperature
Vegetation Phenology Changes and Recovery after an Extreme Rainfall Lin, Yinghao, Guo, Xiaoyu, Liu, Yang, Zhou, Liming, Wang, Yadi, Ge, Qiang, Wang, Yuye Reflectance
Wavelet local multiple correlation analysis of long-term AOD, LST, and NDVI time-series over different climatic zones of India Kadaverugu, Rakesh, Nandeshwar, Sukeshini, Biniwale, Rajesh Reflectance, Aerosol Optical Depth/Thickness, Land Surface Temperature, Emissivity
How do tradeoffs in satellite spatial and temporal resolution impact snow water equivalent reconstruction? Bair, Edward H., Dozier, Jeff, Rittger, Karl, Stillinger, Timbo, Kleiber, William, Davis, Robert E. Heat Flux, Air Temperature, Skin Temperature, Specific Humidity, Water Vapor, Precipitation Rate, Snow/Ice, Evaporation, Latent Heat Flux, Latent Heat Flux, Sensible Heat Flux, Diffusion, Surface Winds, Wind Speed, U/V Wind Components, Wind Stress, Wind Stress, Surface Roughness, Planetary Boundary Layer Height, Ice Fraction, Reflectance
A web-based system for satellite-based high-resolution global soil moisture maps Khazaei, Morteza, Hamzeh, Saeid, Samani, Najmeh Neysani, Muhuri, Arnab, Goita, Kalifa, Weng, Qihao Reflectance, Land Surface Temperature, Emissivity, Surface Soil Moisture
Assessing Phenological Shifts of Deciduous Forests in Turkey under Senel, Tugce, Kanmaz, Oguzhan, Bektas Balcik, Filiz, Avc, Meral, Dalfes, H. Nuzhet Reflectance
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