The MCD19A1 Version 6.1 data product is a Moderate Resolution Imaging
Spectroradiometer (MODIS) Terra and Aqua combined Land Surface Bidirectional
Reflectance Factor (BRF) gridded Level 2 product produced daily at 500 meter
and 1 kilometer resolution. For more information see theMAIAC user guide.
Bands
Pixel Size1000 meters
Bands
Name
Min
Max
Scale
Pixel Size
Description
Sur_refl1
-100
16000
0.0001
meters
Surface reflectance at 500m for band 1.
Sur_refl2
-100
16000
0.0001
meters
Surface reflectance at 500m for band 2.
Sur_refl3
-100
16000
0.0001
meters
Surface reflectance at 500m for band 3.
Sur_refl4
-100
16000
0.0001
meters
Surface reflectance at 500m for band 4.
Sur_refl5
-100
16000
0.0001
meters
Surface reflectance at 500m for band 5.
Sur_refl6
-100
16000
0.0001
meters
Surface reflectance at 500m for band 6.
Sur_refl7
-100
16000
0.0001
meters
Surface reflectance at 500m for band 7.
Sur_refl8
-100
16000
0.0001
meters
Surface reflectance at 1km for band 8.
Sur_refl9
-100
16000
0.0001
meters
Surface reflectance at 1km for band 9.
Sur_refl10
-100
16000
0.0001
meters
Surface reflectance at 1km for band 10.
Sur_refl11
-100
16000
0.0001
meters
Surface reflectance at 1km for band 11.
Sur_refl12
-100
16000
0.0001
meters
Surface reflectance at 1km for band 12.
Sigma_BRFn1
-100
16000
0.0001
meters
BRFn uncertainty over time at 1km, for band 1
Sigma_BRFn2
-100
16000
0.0001
meters
BRFn uncertainty over time at 1km, for band 2
Status_QA
meters
QA bits
Bitmask for Status_QA
Bits 0-2: Cloud mask
0: Undefined
1: Clear
2: Possibly cloudy (detected by AOD filter)
3: Cloudy (detected by cloud mask algorithm)
5: Cloud shadow
6: Hot spot of fire
7: Water sediments
Bits 3-4: Land water snow/ice mask
0: Land
1: Water
2: Snow
3: Ice
Bits 5-7: Adjacency mask
0: Normal condition/Clear
1: Adjacent to clouds
2: Surrounded by more than 4 cloudy pixels
3: Adjacent to a single cloudy pixel
4: Adjacent to snow
5: Snow was previously detected in this pixel
Bit 8: AOD level
0: AOD is low (<=0.6)
1: AOD is high (> 0.6) or undefined
Bits 9-10: AOD Type
0: Background aerosol
1: Smoke
2: Dust
Bit 11: BRF retrieved over snow assuming AOD = 0.05
0: no
1: yes
Bit 12: Altitude >4.2km (land)/3.5km (water), BRF is retrieved using
climatology AOD =0.02
0: no
1: yes
Bits 13-15: Surface Change Mask
0: No change
1: Regular change Green up (Relative change in Red and NIR
nadir-normalized BRF is more than 5% but less than 15%).
2: Big change Green up (Relative change in Red and NIR
nadir-normalized BRF is more than 15%).
3: Regular change Senescence
4: Big change Senescence
cosSZA
0
10000
0.0001
meters
Cosine of Solar zenith angle (5 km resulution)
cosVZA
0
10000
0.0001
meters
Cosine view zenith angle (5 km resolution)
RelAZ
-18000
18000
0.01
meters
Relative azimuth angle (5 km resolution)
Scattering_Angle
-18000
18000
0.01
meters
Scattering angle (5 km resolution)
SAZ
-18000
18000
0.01
meters
Solar Azimuth Angle (5 km resolution)
VAZ
-18000
18000
0.01
meters
View Azimuth Angle (5 km resolution)
Glint_Angle
-18000
18000
0.01
meters
Glint angle (5 km resolution)
Fv
-100
100
meters
RTLS volumetric kernel (5 km resolution)
Fg
-100
100
meters
RTLS geometric kernel (5 km resolution)
Terms of Use
Terms of Use
MODIS data and products acquired through the LP DAAC
have no restrictions on subsequent use, sale, or redistribution.
The MCD19A1 Version 6.1 data product is a Moderate Resolution Imaging Spectroradiometer (MODIS) Terra and Aqua combined Land Surface Bidirectional Reflectance Factor (BRF) gridded Level 2 product produced daily at 500 meter and 1 kilometer resolution. For more information see the MAIAC user guide.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],[],[[["\u003cp\u003eMCD19A1 V6.1 provides daily land surface reflectance data at 500m and 1km resolutions from MODIS Terra and Aqua satellites.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset includes surface reflectance bands, quality assessment information, and angular parameters.\u003c/p\u003e\n"],["\u003cp\u003eData is available from December 21, 2000, to December 10, 2024, and is provided by NASA LP DAAC at the USGS EROS Center.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset is freely available for use, with no restrictions on subsequent use, sale, or redistribution.\u003c/p\u003e\n"],["\u003cp\u003eUsers can access and analyze the data using Google Earth Engine.\u003c/p\u003e\n"]]],[],null,["Dataset Availability\n: 2000-12-21T00:00:00Z--2025-09-06T23:45:00Z\n\nDataset Provider\n:\n\n\n [NASA LP DAAC at the USGS EROS Center](https://doi.org/10.5067/MODIS/MCD19A1.061)\n\nCadence\n: 1 Day\n\nTags\n:\n[aerosol](/earth-engine/datasets/tags/aerosol) [aod](/earth-engine/datasets/tags/aod) [aqua](/earth-engine/datasets/tags/aqua) [daily](/earth-engine/datasets/tags/daily) [global](/earth-engine/datasets/tags/global) [maiac](/earth-engine/datasets/tags/maiac) [modis](/earth-engine/datasets/tags/modis) [nasa](/earth-engine/datasets/tags/nasa) [satellite-imagery](/earth-engine/datasets/tags/satellite-imagery) [terra](/earth-engine/datasets/tags/terra) [usgs](/earth-engine/datasets/tags/usgs) \n\nDescription \nThe MCD19A1 Version 6.1 data product is a Moderate Resolution Imaging\nSpectroradiometer (MODIS) Terra and Aqua combined Land Surface Bidirectional\nReflectance Factor (BRF) gridded Level 2 product produced daily at 500 meter\nand 1 kilometer resolution. For more information see the\n[MAIAC user guide](https://lpdaac.usgs.gov/documents/1500/MCD19_User_Guide_V61.pdf).\n\nBands\n\n\n**Pixel Size**\n\n1000 meters\n\n**Bands**\n\n| Name | Min | Max | Scale | Pixel Size | Description |\n|--------------------|--------|-------|--------|------------|------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `Sur_refl1` | -100 | 16000 | 0.0001 | meters | Surface reflectance at 500m for band 1. |\n| `Sur_refl2` | -100 | 16000 | 0.0001 | meters | Surface reflectance at 500m for band 2. |\n| `Sur_refl3` | -100 | 16000 | 0.0001 | meters | Surface reflectance at 500m for band 3. |\n| `Sur_refl4` | -100 | 16000 | 0.0001 | meters | Surface reflectance at 500m for band 4. |\n| `Sur_refl5` | -100 | 16000 | 0.0001 | meters | Surface reflectance at 500m for band 5. |\n| `Sur_refl6` | -100 | 16000 | 0.0001 | meters | Surface reflectance at 500m for band 6. |\n| `Sur_refl7` | -100 | 16000 | 0.0001 | meters | Surface reflectance at 500m for band 7. |\n| `Sur_refl8` | -100 | 16000 | 0.0001 | meters | Surface reflectance at 1km for band 8. |\n| `Sur_refl9` | -100 | 16000 | 0.0001 | meters | Surface reflectance at 1km for band 9. |\n| `Sur_refl10` | -100 | 16000 | 0.0001 | meters | Surface reflectance at 1km for band 10. |\n| `Sur_refl11` | -100 | 16000 | 0.0001 | meters | Surface reflectance at 1km for band 11. |\n| `Sur_refl12` | -100 | 16000 | 0.0001 | meters | Surface reflectance at 1km for band 12. |\n| `Sigma_BRFn1` | -100 | 16000 | 0.0001 | meters | BRFn uncertainty over time at 1km, for band 1 |\n| `Sigma_BRFn2` | -100 | 16000 | 0.0001 | meters | BRFn uncertainty over time at 1km, for band 2 |\n| `Status_QA` | | | | meters | QA bits |\n| Bitmask for Status_QA - Bits 0-2: Cloud mask - 0: Undefined - 1: Clear - 2: Possibly cloudy (detected by AOD filter) - 3: Cloudy (detected by cloud mask algorithm) - 5: Cloud shadow - 6: Hot spot of fire - 7: Water sediments - Bits 3-4: Land water snow/ice mask - 0: Land - 1: Water - 2: Snow - 3: Ice - Bits 5-7: Adjacency mask - 0: Normal condition/Clear - 1: Adjacent to clouds - 2: Surrounded by more than 4 cloudy pixels - 3: Adjacent to a single cloudy pixel - 4: Adjacent to snow - 5: Snow was previously detected in this pixel - Bit 8: AOD level - 0: AOD is low (\\\u003c=0.6) - 1: AOD is high (\\\u003e 0.6) or undefined - Bits 9-10: AOD Type - 0: Background aerosol - 1: Smoke - 2: Dust - Bit 11: BRF retrieved over snow assuming AOD = 0.05 - 0: no - 1: yes - Bit 12: Altitude \\\u003e4.2km (land)/3.5km (water), BRF is retrieved using climatology AOD =0.02 - 0: no - 1: yes - Bits 13-15: Surface Change Mask - 0: No change - 1: Regular change Green up (Relative change in Red and NIR nadir-normalized BRF is more than 5% but less than 15%). - 2: Big change Green up (Relative change in Red and NIR nadir-normalized BRF is more than 15%). - 3: Regular change Senescence - 4: Big change Senescence ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n| `cosSZA` | 0 | 10000 | 0.0001 | meters | Cosine of Solar zenith angle (5 km resulution) |\n| `cosVZA` | 0 | 10000 | 0.0001 | meters | Cosine view zenith angle (5 km resolution) |\n| `RelAZ` | -18000 | 18000 | 0.01 | meters | Relative azimuth angle (5 km resolution) |\n| `Scattering_Angle` | -18000 | 18000 | 0.01 | meters | Scattering angle (5 km resolution) |\n| `SAZ` | -18000 | 18000 | 0.01 | meters | Solar Azimuth Angle (5 km resolution) |\n| `VAZ` | -18000 | 18000 | 0.01 | meters | View Azimuth Angle (5 km resolution) |\n| `Glint_Angle` | -18000 | 18000 | 0.01 | meters | Glint angle (5 km resolution) |\n| `Fv` | -100 | 100 | | meters | RTLS volumetric kernel (5 km resolution) |\n| `Fg` | -100 | 100 | | meters | RTLS geometric kernel (5 km resolution) |\n\nTerms of Use\n\n**Terms of Use**\n\nMODIS data and products acquired through the LP DAAC\nhave no restrictions on subsequent use, sale, or redistribution.\n\nCitations \nCitations:\n\n- Please visit [LP DAAC 'Citing Our Data' page](https://lpdaac.usgs.gov/citing_our_data)\n for information on citing LP DAAC datasets.\n\nDOIs\n\n- \u003chttps://doi.org/10.5067/MODIS/MCD19A1.061\u003e\n\nExplore with Earth Engine **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\nCode Editor (JavaScript) \n\n```javascript\nvar collection = ee.ImageCollection('MODIS/061/MCD19A1_GRANULES')\n .select('Sur_refl1')\n .filterDate('2000-01-01', '2000-03-07');\n\nvar band_viz = {\n min: 0,\n max: 1100,\n palette: ['black', 'blue', 'purple', 'cyan', 'green', 'yellow', 'red']\n};\n\nMap.addLayer(collection.mean(), band_viz, 'Surface Bidirectional Reflectance Factor');\nMap.setCenter(76, 13, 6);\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_061_MCD19A1_GRANULES) \n[MCD19A1.061: Land Surface BRF Daily L2G Global 500m and 1km](/earth-engine/datasets/catalog/MODIS_061_MCD19A1_GRANULES) \nThe MCD19A1 Version 6.1 data product is a Moderate Resolution Imaging Spectroradiometer (MODIS) Terra and Aqua combined Land Surface Bidirectional Reflectance Factor (BRF) gridded Level 2 product produced daily at 500 meter and 1 kilometer resolution. For more information see the MAIAC user guide. \nMODIS/061/MCD19A1_GRANULES, aerosol,aod,aqua,daily,global,maiac,modis,nasa,satellite-imagery,terra,usgs \n2000-12-21T00:00:00Z/2025-09-06T23:45:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/MODIS/MCD19A1.061](https://doi.org/https://doi.org/10.5067/MODIS/MCD19A1.061)\n- [https://doi.org/10.5067/MODIS/MCD19A1.061](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_061_MCD19A1_GRANULES)"]]
