MCD19A2.006: Terra & Aqua MAIAC Land Aerosol Optical Depth Daily 1km

Dataset Availability

2000-02-26T00:00:00Z–2023-01-23T23:55:00

Dataset Provider

NASA LP DAAC at the USGS EROS Center

Earth Engine Snippet

ee.ImageCollection("MODIS/006/MCD19A2_GRANULES")

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Tags

aerosol aqua daily global modis nasa terra usgs

aod

maiac

mcd19a2

Description

The MCD19A2 V6 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.

Documentation:

• User's Guide

• Algorithm Theoretical Basis Document (ATBD)

• General Documentation

Bands

Resolution
1000 meters

Bands

Name	Units	Min	Max	Scale	Description
Optical_Depth_047		-100	5000	0.001	Blue band (0.47 μm) aerosol optical depth over land
Optical_Depth_055		-100	5000	0.001	Green band (0.55 μm) aerosol optical depth over land
AOD_Uncertainty		-100	30000	0.0001	AOD uncertainty based on blue-band surface brightness (reflectance)
FineModeFraction		0	10000	0.0001	Fine mode fraction for ocean
Column_WV	cm	0	30000	0.001	Column water vapor over land
AOD_QA					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 8 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 (may be unreliable) 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
AOD_MODEL		0	100		AOD model used in retrieval
Injection_Height	m	0	10000		Smoke injection height
cosSZA		0	10000	0.0001	Cosine of solar zenith angle (5 km resolution)
cosVZA		0	10000	0.0001	Cosine view zenith angle (5 km resolution)
RelAZ		-18000	18000	0.01	Relative azimuth angle (5 km resolution)
Scattering_Angle		-18000	18000	0.01	Scattering angle (5 km resolution)
Glint_Angle		-18000	18000	0.01	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 for information on citing LP DAAC datasets.

DOIs

• https://doi.org/10.5067/MODIS/MCD19A2.006

Explore in 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 sign up for Earth Engine access.

var collection = ee.ImageCollection('MODIS/006/MCD19A2_GRANULES')
                  .select('Optical_Depth_047')
                  .filterDate('2019-01-01', '2019-01-15');

var band_viz = {
  min: 0,
  max: 500,
  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

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MCD19A2.006: Terra & Aqua MAIAC Land Aerosol Optical Depth Daily 1km

The MCD19A2 V6 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. Documentation: User's Guide Algorithm Theoretical Basis Document (ATBD) General …

MODIS/006/MCD19A2_GRANULES, aerosol,aqua,daily,global,modis,nasa,terra,usgs

2000-02-26T00:00:00Z/2023-01-23T23:55:00

Google Earth Engine

https://developers.google.com/earth-engine/datasets

• https://doi.org/10.5067/MODIS/MCD19A2.006