![MODIS/061/MCD19A2_GRANULES](https://developers.google.com/earth-engine/datasets/images/MODIS/MODIS_061_MCD19A2_GRANULES_sample.png) Dataset Availability : 2000-02-24T00:00:00Z--2026-11-12T23:55:00Z Dataset Producer : [NASA LP DAAC at the USGS EROS Center](https://doi.org/10.5067/MODIS/MCD19A2.061) Cadence : 1 Day Tags : [aerosol](https://developers.google.com/earth-engine/datasets/tags/aerosol.md.txt) [aod](https://developers.google.com/earth-engine/datasets/tags/aod.md.txt) [aqua](https://developers.google.com/earth-engine/datasets/tags/aqua.md.txt) [atmosphere](https://developers.google.com/earth-engine/datasets/tags/atmosphere.md.txt) [daily](https://developers.google.com/earth-engine/datasets/tags/daily.md.txt) [global](https://developers.google.com/earth-engine/datasets/tags/global.md.txt) [maiac](https://developers.google.com/earth-engine/datasets/tags/maiac.md.txt) [modis](https://developers.google.com/earth-engine/datasets/tags/modis.md.txt) [nasa](https://developers.google.com/earth-engine/datasets/tags/nasa.md.txt) [terra](https://developers.google.com/earth-engine/datasets/tags/terra.md.txt) [usgs](https://developers.google.com/earth-engine/datasets/tags/usgs.md.txt) mcd19a2 #### Description The MCD19A2 V6.1 data product is a MODIS Terra and Aqua combined Multi-angle Implementation of Atmospheric Correction (MAIAC) Land Aerosol Optical Depth (AOD) gridded Level 2 product produced daily at 1 km resolution. For more information see the [MAIAC user guide](https://lpdaac.usgs.gov/documents/1500/MCD19_User_Guide_V61.pdf). NOTE: This product has been released with the caveat that the reprocessing for the full mission is expected to continue through summer 2023. ### Bands **Bands** Pixel size: varies | Name | Units | Min | Max | Scale | Pixel Size | Description | |---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---| | `Optical_Depth_047` | | -100 | 8000 | 0.001 | 1000 meters | Aerosol optical depth over land retrieved in the MODIS Blue band (0.47 μm). AOD is not received at high altitude (greater than 4.2 km) except when smoke or dust is detected; rather, we report a static value of 0.02 used for atmospheric correction. | | `Optical_Depth_055` | | -100 | 8000 | 0.001 | 1000 meters | Aerosol optical depth over land retrieved in the MODIS Green band (0.55 μm). | | `AOD_Uncertainty` | | 0 | 30000 | 0.0001 | 1000 meters | AOD uncertainty based on blue-band surface brightness (reflectance) | | `FineModeFraction` | | 0 | 1000 | | 1000 meters | Fine mode fraction for ocean and large inland lakes | | `Column_WV` | cm | 0 | 30000 | 0.001 | 1000 meters | Column water vapor over land, retrieved from MODIS near-IR bands at 0.94 μm. When reported for cloudy pixels, it represents water vapor above the cloud. | | `AOD_QA` | | | | | 1000 meters | AOD QA | | Bitmask for AOD_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 - Bits 8-11: QA for AOD - 0: Best quality - 1: Water Sediments are detected (water) - 3: There is 1 neighbor cloud - 4: There is \>1 neighbor clouds - 5: No retrieval (cloudy, or whatever) - 6: No retrievals near detected or previously detected snow' - 7: Climatology AOD - altitude above 3.5km (water) and 4.2km (land)' - 8: No retrieval due to sun glint (water) - 9: Retrieved AOD is very low (\<0.05) due to glint (water) - 10: AOD within +-2km from the coastline is replaced by nearby AOD - 11: Land, research quality: AOD retrieved but CM is possibly cloudy - Bit 12: Glint mask - 0: No glint - 1: Glint (glint angle \< 40°) - Bits 13-14: Aerosol model - 0: Background model (regional) - 1: Smoke model (regional) - 2: Dust model - Bit 15: Reserved - 0: Reserved for future use - 1: Reserved for future use |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| | `Injection_Height` | m | 0 | 10000 | | 1000 meters | Smoke injection height | | `AngstromExp_470-780` | | | | 0.0001 | 1000 meters | Angstrom exponent 470-780nm over the ocean | | `cosSZA` | | 0 | 10000 | 0.0001 | 5000 meters | Cosine of solar zenith angle (5 km resolution) | | `cosVZA` | | 0 | 10000 | 0.0001 | 5000 meters | Cosine view zenith angle (5 km resolution) | | `RelAZ` | | -18000 | 18000 | 0.01 | 5000 meters | Relative azimuth angle (5 km resolution) | | `Scattering_Angle` | | -18000 | 18000 | 0.01 | 5000 meters | Scattering angle (5 km resolution) | | `Glint_Angle` | | -18000 | 18000 | 0.01 | 5000 meters | Glint angle (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. ### Citations Citations: - Please visit [LP DAAC 'Citing Our Data' page](https://lpdaac.usgs.gov/citing_our_data) for information on citing LP DAAC datasets. ### DOIs - ### Explore with Earth Engine > [!NOTE] > **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) ### Code Editor (JavaScript) ```javascript var collection = ee.ImageCollection('MODIS/061/MCD19A2_GRANULES') .select('Optical_Depth_047') .filterDate('2023-01-01', '2023-01-15'); var band_viz = { min: 0, max: 1100, palette: ['black', 'blue', 'purple', 'cyan', 'green', 'yellow', 'red'] }; Map.addLayer(collection.mean(), band_viz, 'Optical Depth 047'); Map.setCenter(76, 13, 6); ``` [Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_061_MCD19A2_GRANULES) [MCD19A2.061: Terra \& Aqua MAIAC Land Aerosol Optical Depth Daily 1km](https://developers.google.com/earth-engine/datasets/catalog/MODIS_061_MCD19A2_GRANULES.md.txt) The MCD19A2 V6.1 data product is a MODIS Terra and Aqua combined Multi-angle Implementation of Atmospheric Correction (MAIAC) Land Aerosol Optical Depth (AOD) gridded Level 2 product produced daily at 1 km resolution. For more information see the MAIAC user guide. NOTE: This product has been released with the caveat ... MODIS/061/MCD19A2_GRANULES, aerosol,aod,aqua,atmosphere,daily,global,maiac,modis,nasa,terra,usgs 2000-02-24T00:00:00Z/2026-11-12T23:55:00Z -90 -180 90 180 Google Earth Engine https://developers.google.com/earth-engine/datasets - [https://doi.org/10.5067/MODIS/MCD19A2.061](https://doi.org/https://doi.org/10.5067/MODIS/MCD19A2.061) - [https://doi.org/10.5067/MODIS/MCD19A2.061](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_061_MCD19A2_GRANULES)