MISR L2 FIRSTLOOK Aerosol Product subset for the ARCTAS region V001

ATSM2AEF_001 is the Multi-angle Imaging SpectroRadiometer (MISR) Level 2 FIRSTLOOK Aerosol Product subset for the ARCTAS region version 1 data product. It contains Aerosol optical depth and particle type, with associated atmospheric data produced using ancillary inputs from the previous time period. Data collection for this product is complete.

FIRSTLOOK processing uses the new time dependence of the Atmospheric and Surface Climatology (TASC) from the same month/previous year. The TASC data set now contains snow-ice and ocean surface wind speed values that are updated on a monthly basis. Therefore, these data sets cannot be generated until the end of the month. Products generated are distinguished by the presence of FIRSTLOOK in the file names. The MISR instrument consists of nine push-broom cameras that measure radiance in four spectral bands. Global coverage is achieved in nine days. The cameras are arranged with one camera pointing toward the nadir, four forward, and four aftward. It takes seven minutes for all nine cameras to view the same surface location. The view angles relative to the surface reference ellipsoid are 0, 26.1, 45.6, 60.0, and 70.5 degrees. The spectral band shapes are nominally Gaussian, centered at 443, 555, 670, and 865 nm.

MISR is designed to view Earth with cameras in 9 different directions. As the instrument flies overhead, each piece of Earth's surface below is successfully imaged by all nine cameras in 4 wavelengths (blue, green, red, and near-infrared). The goal of MISR is to improve our understanding of the fate of sunlight in Earth's environment and distinguish different types of clouds, particles, and surfaces. Specifically, MISR monitors the monthly, seasonal, and long-term trends in three areas: 1) amount and type of atmospheric particles (aerosols), including those formed by natural sources and by human activities; 2) amounts, types, and heights of clouds, and 3) distribution of land surface cover, including vegetation canopy structure.

Data and Resources

Additional Info

Field	Value
Maintainer	Earthdata Forum
Last Updated	September 21, 2026, 18:35 (UTC)
Created	April 28, 2025, 04:21 (UTC)
accessLevel	public
bureauCode	{026:00}
catalog_conformsTo	https://project-open-data.cio.gov/v1.1/schema
harvest_object_id	b4d22f6e-89fd-49c9-a363-f46a18ea5fc4
harvest_source_id	b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title	Science Discovery Engine
identifier	10.5067/Terra/MISR/ATSM2AEF_L2.001
license	https://www.usa.gov/government-works
modified	2026-09-14T22:16:00Z
programCode	{026:000}
publisher	NASA/JPL/MISR;NASA/LARC/SD/ASDC
resource-type	Dataset
source_datajson_identifier	true
source_hash	9d15e0ec7db42e11bcf19d9d61a800c6d5f8a811b49ac759161a1a4099f0b159
source_schema_version	1.1
spatial	["CARTESIAN", [{"WestBoundingCoordinate": -157, "NorthBoundingCoordinate": 71, "EastBoundingCoordinate": -110, "SouthBoundingCoordinate": 54}]]
temporal	2008-04-02/2008-07-24
theme	{"Earth Science"}