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MODIS/Aqua Surface Reflectance (SREF) at Arizona Walnut Gulch Kendall Grasslands

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BandDescriptionData BandsQuality Filtered and ScaledSummary Data
sur_refl_b01Surface reflectance for band 1 csv json csv jsoncsv json
sur_refl_b02Surface reflectance for band 2 csv json csv jsoncsv json
sur_refl_b03Surface reflectance for band 3 csv json csv jsoncsv json
sur_refl_b04Surface reflectance for band 4 csv json csv jsoncsv json
sur_refl_b05Surface reflectance for band 5 csv json csv jsoncsv json
sur_refl_b06Surface reflectance for band 6 csv json csv jsoncsv json
sur_refl_b07Surface reflectance for band 7 csv json csv jsoncsv json
sur_refl_day_of_yearSurface reflectance day of year csv json
sur_refl_qc_500mSurface reflectance 500m quality control flags csv json
sur_refl_razRelative azimuth csv json
sur_refl_state_500mSurface reflectance 500m state flags csv json
sur_refl_szenSolar zenith csv json
sur_refl_vzenView zenith csv json
All Bandscsv jsoncsv jsoncsv json

See File Formats documentation for details. Pixel Numbering Scheme

ProductMODIS/Aqua Surface Reflectance (SREF)
CoordinatesLatitude: 31.736527, Longitude: -109.94188 (WGS84 datum)
Areal ExtentApproximately 8.5 km [17 Pixels] Wide x 8.5 km [17 Pixels] High
Subset Date Range2002-07-04 (2002185) to 2026-03-06 (2026065)
Site IDus_arizona_walnut_gulch_kendall_grasslands
Quality Control ConditionsAs Specified by Science Team (See QC Details tab)

Cite the Fixed Sites Subsets Tool [1] and the subset product [2] with the following citations. You may also download BibTeX citation

[1] ORNL DAAC. 2018. Fixed Sites Subsetting and Visualization Tool. ORNL DAAC, Oak Ridge, Tennessee, USA. Accessed April 02, 2026. Subset obtained for MYD09A1 product at site id 'us_arizona_walnut_gulch_kendall_grasslands'. https://doi.org/10.3334/ORNLDAAC/1567

[2] E. Vermote. 2021. MYD09A1 MODIS/Aqua Surface Reflectance 8-Day L3 Global 500m SIN Grid V061. NASA EOSDIS Land Processes DAAC. https://doi.org/10.5067/MODIS/MYD09A1.061

Location Details

Latitude [31.736527] Longitude [-109.94188]: Horizontal Tile [08] Vertical Tile [05] Sample [779] Line [991]

Subset area boundarySubset area boundary
Corner Coordinates
Northwest Corner Latitude,Longitude: 31.771917 N, 110.025568 WNortheast Corner Latitude,Longitude: 31.771917 N, 109.94225 W
Southwest Corner Latitude,Longitude: 31.701083 N, 109.941472 WSoutheast Corner Latitude,Longitude: 31.701083 N, 109.858217 W
  • QC Filter Conditions
  • QC explanation for MODIS/Aqua Surface Reflectance SREF_QC
  • QC bit word numbering (0,1,2,3,4,5,6,....n):(n=7 or 15 or 31)
Filter ClassBitsBinaryQA-bitsValue
(Bin)		Value
(Int)		Bands
applied		QC bandDescriptionDisplay
Aerosol_Quality16yes8-9000allsur_refl_state_500maerosol quantity - ClimatologyPresented
Aerosol_Quality16yes8-90164allsur_refl_state_500maerosol quantity - LowPresented
Aerosol_Quality16yes8-910128allsur_refl_state_500maerosol quantity - AveragePresented
Aerosol_Quality16yes8-911192allsur_refl_state_500maerosol quantity - HighSupressed
Cloud_Shadow16yes1314allsur_refl_state_500mcloud shadow - YesSupressed
Cloud_Shadow16yes1300allsur_refl_state_500mcloud shadow - NoPresented
MODLAND_QA32yes30-31000allsur_refl_qc_500mideal quality all bandsPresented
MODLAND_QA32yes30-31011allsur_refl_qc_500mless than ideal quality some or all bandsPresented
MODLAND_QA32yes30-31102allsur_refl_qc_500mcloud effects all bandsSupressed
MODLAND_QA32yes30-31113allsur_refl_qc_500mother reasons some or all bands may be fill valueSupressed

Timeseries View

MYD09A1 / sur_refl_b01 (All acceptable pixels)

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Includes all pixels that have acceptable quality

MYD09A1 / sur_refl_b02 (All acceptable pixels)

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Includes all pixels that have acceptable quality

MYD09A1 / sur_refl_b03 (All acceptable pixels)

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Includes all pixels that have acceptable quality

MYD09A1 / sur_refl_b04 (All acceptable pixels)

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Includes all pixels that have acceptable quality

MYD09A1 / sur_refl_b05 (All acceptable pixels)

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Includes all pixels that have acceptable quality

MYD09A1 / sur_refl_b06 (All acceptable pixels)

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Includes all pixels that have acceptable quality

MYD09A1 / sur_refl_b07 (All acceptable pixels)

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Includes all pixels that have acceptable quality

Gridded View



Additional Information

MODIS Landcover IGBP Classification Scheme (Type_1 MCD12Q1)

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BandDescriptionData Bands
LC_Type1Land Cover Type 1: Annual International Geosphere-Biosphere Programme (IGBP) classification csv json

Shannon Diversity Components: Richness= Evenness=

User Guide for the MODIS Land Cover Type Product (MCD12Q1)PDF

MODIS Phenology time series (MCD12Q2)

Phenology region for user selected area 8.5 km wide x 8.5 km high

Cycle 1

Cycle 2
  • Greenup: Average date of the greenup (date when EVI2 first crossed 15% of amplitude) in the subset area
  • MidGreenup: Average date of the mid greenup (date when EVI2 first crossed 50% of amplitude) in the subset area
  • Maturity: Average date of the maturity (date when EVI2 first crossed 90% of amplitude) in the subset area
  • Peak: Average date of the peak (date when EVI2 reached maximum amplitude) in the subset area
  • Senescence: Average date of the senescence (date when EVI2 last crossed 90% of amplitude) in the subset area
  • MidGreendown: Average date of the mid greendown (date when EVI2 last crossed 50% of amplitude) in the subset area
  • Dormancy: Average date of the dormancy (date when EVI2 last crossed 15% of amplitude) in the subset area

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ProductData Bands
MCD12Q2.061 csv json

User Guide for the MODIS Land Cover Dynamics Product (MCD12Q2)PDF

Resources

Create statistics plots in R
Visualize the data from the 'Downloads' section above as informative plots in R. Using the provided scripts, different statistical plots can be easily generated, such as plots of mean monthly values or mean yearly values, frequency histograms, time series plots with years stacked, etc.