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

Page Summary

• This dataset, MCD19A2 V6, provides daily MODIS Terra and Aqua combined MAIAC Land Aerosol Optical Depth (AOD) at 1 km resolution.

• The dataset is available from February 26, 2000, to February 17, 2023.

• It has been superseded by the MODIS/061/MCD19A2_GRANULES dataset.

• Data includes various bands such as Optical_Depth, AOD_Uncertainty, FineModeFraction, Column_WV, AOD_QA, and more, with specific pixel sizes and descriptions.

• There are no restrictions on the subsequent use, sale, or redistribution of this data.

Caution: This dataset has been superseded by MODIS/061/MCD19A2_GRANULES.

Dataset Availability

2000-02-26T00:00:00Z–2023-02-17T00:00:00Z

Dataset Provider

NASA LP DAAC at the USGS EROS Center

Earth Engine Snippet

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

Cadence

1 Day

Tags

aerosol

aod

aqua

atmosphere

daily

global

maiac

mcd19a2

modis

nasa

terra

usgs

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

Pixel Size
1000 meters

Bands

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

DOIs

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

Explore with Earth Engine

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Code Editor (JavaScript)

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

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

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,aod,aqua,atmosphere,daily,global,maiac,modis,nasa,terra,usgs

2000-02-26T00:00:00Z/2023-02-17T00:00:00Z

-90 -180 90 180

Google Earth Engine

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

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