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ABoVE: Corrected MODIS MAIAC Reflectance at Tower Sites, Alaska and Canada, 2000-2016

Metadata Updated: December 6, 2023

This dataset provides angular corrections of MODIS Multi-Angle Implementation of Atmospheric Correction algorithm (MAIAC) surface reflectances by two methods at each of 62 flux tower sites (1 km x 1 km area) across the ABoVE domain in Alaska and western Canada from 2000 to 2015/2016. The original MAIAC reflectance data were corrected to consistent view and illumination angles (0 degree view zenith angle and 45 degree of sun zenith angle) using two independent algorithms: the first based on the original BRDF (Bidirectional Reflectance Distribution Function) parameters provided by the MAIAC team, and the second based on a machine learning approach (random forests). The corrected data preserve the original MAIAC data's sub-daily temporal resolution and 1 km spatial resolution with seven land bands (bands 1-7) and five ocean bands (bands 8-12). The resulting tower site sub-daily timeseries of angular corrected surface reflectances are suitable for long-term studies on patterns, processes, and dynamics of surface phenomena.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Created Date December 1, 2022
Metadata Updated Date December 6, 2023

Metadata Source

Harvested from NASA Data.json

Graphic Preview

MAIAC tiles, flux sites with their IGBP classes, and ABoVE core and extended domain boundaries. IGBP classes: DBF-deciduous broadleaf forests; ENF-evergreen needleleaf forests; GRA-grasslands; MF-mixed forests; OSH-open shrubland; WET-permanent wetland; OSH-open shrubland; WET-permanent wetland (Yu et al., 2019, in preparation).

Additional Metadata

Resource Type Dataset
Metadata Created Date December 1, 2022
Metadata Updated Date December 6, 2023
Publisher ORNL_DAAC
Maintainer
Identifier C2143403511-ORNL_CLOUD
Data First Published 2019-07-31
Language en-US
Data Last Modified 2023-06-12
Category ABoVE, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Citation Yu, R., G. Hmimina, K.F. Huemmrich, D.P. Billesbach, A. Lyapustin, Y. Wang, and J.A. Gamon. 2019. ABoVE: Corrected MODIS MAIAC Reflectance at Tower Sites, Alaska and Canada, 2000-2016. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1700
Graphic Preview Description MAIAC tiles, flux sites with their IGBP classes, and ABoVE core and extended domain boundaries. IGBP classes: DBF-deciduous broadleaf forests; ENF-evergreen needleleaf forests; GRA-grasslands; MF-mixed forests; OSH-open shrubland; WET-permanent wetland; OSH-open shrubland; WET-permanent wetland (Yu et al., 2019, in preparation).
Graphic Preview File https://daac.ornl.gov/ABOVE/guides/MODIS_MAIAC_Reflectance_Fig2.png
Harvest Object Id e2297a94-5e39-401c-8e31-cec83fab9ce7
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://doi.org/10.3334/ORNLDAAC/1700
Metadata Type geospatial
Old Spatial -157.41 42.64 -74.04 71.32
Program Code 026:001
Source Datajson Identifier True
Source Hash 620661fa607e4357a8c4ff8dceb5bea8712e64d7296d7388ca4536be984da69e
Source Schema Version 1.1
Spatial
Temporal 2000-02-24T00:00:00Z/2016-07-31T23:59:59Z

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