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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

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
Spatial Reference System(s)
MODIS Sinusoidal Tiling System
Location
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
Number of Files/Granules
379580
Processing Level
3
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. (2021). MODIS/Terra Surface Reflectance 8-Day L3 Global 500m SIN Grid V061 [Dataset]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MOD09A1.061 Date Accessed: 2026-07-11

File Naming Convention

MOD09A1.A2025209.h28v12.061.2025218035852.hdf

The file name begins with the Product Short Name (MOD09A1) followed by the Julian Date of Acquisition formatted as AYYYYDDD (A2025209), the Tile Identifier which is horizontal tile and vertical tile provided as hXXvYY (h28v12), the Version of the data collection (061), the Julian Date and Time of Production designated as YYYYDDDHHMMSS (2025218035852), 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
Evaluation of topographic effects on multiscale leaf area index estimation using remotely sensed observations from multiple sensors Jin, Huaan, Li, Ainong, Xu, Weixing, Xiao, Zhiqiang, Jiang, Jingyi, Xue, Huazhu Leaf Area Index (LAI), Fraction Of Absorbed Photosynthetically Active Radiation (fapar), Reflectance, RADAR IMAGERY, Terrain Elevation, Topographical Relief Maps, Digital Elevation/Terrain Model (DEM)
Generating high spatio-temporal resolution fractional vegetation cover by fusing GF-1 WFV and MODIS data Tao, Guofeng, Jia, Kun, Zhao, Xiang, Wei, Xiangqin, Xie, Xianhong, Zhang, Xiwang, Wang, Bing, Yao, Yunjun, Zhang, Xiaotong Reflectance
Generation of spatially complete and daily continuous surface soil moisture of high spatial resolution Long, Di, Bai, Liangliang, Yan, La, Zhang, Caijin, Yang, Wenting, Lei, Huimin, Quan, Jinling, Meng, Xianyong, Shi, Chunxiang Reflectance, Land Surface Temperature, Emissivity, Vegetation Index, Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI)
Woody plant cover estimation in Texas savanna from MODIS products Yang, Xuebin Leaf Area Index (LAI), Fraction Of Absorbed Photosynthetically Active Radiation (fapar), Reflectance, Canopy Characteristics, Evergreen Vegetation, Crown, Deciduous Vegetation, Leaf Characteristics, Vegetation Cover, Land Use/Land Cover Classification
Vegetation structural change since 1981 significantly enhanced the terrestrial carbon sink Chen, Jing M., Ju, Weimin, Ciais, Philippe, Viovy, Nicolas, Liu, Ronggao, Liu, Yang, Lu, Xuehe Reflectance, Nitrogen Compounds, Nitrogen Oxides
Land cover classification and wetland inundation mapping using MODIS Di Vittorio, Courtney A., Georgakakos, Aris P. Reflectance, Total Surface Precipitation Rate
Remote sensing of mangrove forest phenology and its environmental drivers Pastor-Guzman, J., Dash, Jadunandan, Atkinson, Peter M. Land Use/Land Cover Classification, Reflectance, Plant Phenology, Enhanced Vegetation Index (EVI)
Regional evapotranspiration from an image-based implementation of the Bhattarai, Nishan, Mallick, Kaniska, Brunsell, Nathaniel A., Sun, Ge, Jain, Meha Reflectance, Land Surface Temperature, Emissivity
Remote Sensing Detection of Vegetation and Landform Damages by Coal Wu, Qianhan, Liu, Kai, Song, Chunqiao, Wang, Jida, Ke, Linghong, Ma, Ronghua, Zhang, Wensong, Pan, Hang, Deng, Xinyuan Reflectance
Phenology-based residual trend analysis of MODIS-NDVI time series for assessing human-induced land degradation Chen, Hao, Liu, Xiangnan, Ding, Chao, Huang, Fang Land Use/Land Cover Classification, Reflectance
Quantifying grazing patterns using a new growth function based on MODIS Leaf Area Index Yu, Rui, Evans, A.J., Malleson, N. Leaf Area Index (LAI), Fraction Of Absorbed Photosynthetically Active Radiation (fapar), Reflectance, Photosynthesis, Primary Production, Vegetation Productivity
Quantifying impacts of land-use/cover change on urban vegetation gross primary productionA case study of Wuhan, China Liu, Shishi, Du, Wei, Su, Hang, Wang, Shanqin, Guan, Qingfeng Reflectance, Photosynthesis, Primary Production, Vegetation Productivity
Spatiotemporal variations of forest phenology in the Qinling Mountains and its response to a critical temperature of 10 degrees C Wang, Zhao, Xue, Chunfang, Quan, Wenting, He, Huijuan Reflectance
Spatio-Temporal Convergence of Maximum Daily Light-Use Efficiency Based Zhang, Yao, Xiao, Xiangming, Wolf, Sebastian, Wu, Jin, Wu, Xiaocui, Gioli, Beniamino, Wohlfahrt, Georg, Cescatti, Alessandro, van der Tol, Christiaan, Zhou, Sha, Gough, Christopher M., Gentine, Pierre, Zhang, Yongguang, Steinbrecher, Rainer, Ardo, Jonas Leaf Area Index (LAI), Fraction Of Absorbed Photosynthetically Active Radiation (fapar), Reflectance
Transitioning from MODIS to VIIRSAn analysis of inter-consistency of NDVI data sets for agricultural monitoring Skakun, Sergii, Justice, Christopher O., Vermote, Eric, Roger, Jean-Claude Reflectance
Validating the use of MODIS time series for salinity assessment over agricultural soils in California, USA Whitney, Kristen, Scudiero, Elia, El-Askary, Hesham M., Skaggs, Todd H., Allali, Mohamed, Corwin, Dennis L. Reflectance
Uncertainty in simulating regional gross primary productivity from satellite-based models over northern China grassland Jia, Wenxiao, Liu, Min, Wang, Duoduo, He, Honglin, Shi, Peili, Li, Yingnian, Wang, Yanfen Reflectance
21st century drought-related fires counteract the decline of Amazon deforestation carbon emissions Aragao, Luiz E. O. C., Anderson, Liana O., Fonseca, Marisa G., Rosan, Thais M., Vedovato, Laura B., Wagner, Fabien H., Silva, Camila V. J., Silva Junior, Celso H. L., Arai, Egidio, Aguiar, Ana P., Barlow, Jos, Berenguer, Erika, Deeter, Merritt N., Domingues, Lucas G., Gatti, Luciana, Gloor, Manuel, Malhi, Yadvinder, Marengo, Jose A., Miller, John B., Phillips, Oliver L., Saatchi, Sassan Reflectance, Total Surface Precipitation Rate
Direct impacts of climate change and indirect impacts of non-climate change on land surface phenology variation across Northern China Luo, Zhaohui, Song, Qingmei, Wang, Tao, Zeng, Huanmu, He, Tao, Zhang, Hengjun, Wu, Wenchen Reflectance
Distinguishing between hazardous flooding and non-hazardous agronomic inundation in irrigated rice fieldsA case study fromwest java Sianturi, Riswan, Jetten, Victor G., Ettema, Janneke, Sartohadi, Junun Reflectance
Dynamic change analysis of surface water in the yangtze river basin based on MODIS products Broadley, Robert W., Klenk, Jochen, Thies, Sibylle B., Kenney, Laurence P. J., Granat, Malcolm H. Vegetation Index, Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI), Reflectance
Dynamic monitoring of the Lake Area in the middle and lower reaches of the Yangtze River using MODIS images between 2000 and 2016 Xu, Yuyue, Liu, Wei, Song, Jia, Yao, Ling, Gu, Saihua Reflectance
Determining the start of the growing season from MODIS data in the Indian monsoon regionIdentifying available data in the rainy season and modeling the varied vegetation growth trajectories Shang, Rong, Liu, Ronggao, Xu, Mingzhu, Liu, Yang, Dash, Jadunandun, Ge, Quansheng Reflectance, Albedo, Anisotropy, Vegetation Index, Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI), Plant Phenology
Deep transfer learning for crop yield prediction with remote sensing data Wang, Anna X., Tran, Caelin, Desai, Nikhil, Lobell, David, Ermon, Stefano Reflectance, Land Surface Temperature, Emissivity
A simple method to improve the quality of NDVI time-series data by integrating spatiotemporal information with the Savitzky-Golay filter Cao, Ruyin, Chen, Yang, Shen, Miaogen, Chen, Jin, Zhou, Ji, Wang, Cong, Yang, Wei Reflectance, Vegetation Index, Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI)
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