MODIS Land Validation: Data Availability and Product Status Update
Joanne
M
Nightingale, Sigma Space Corp, joanne.m.nightingale@nasa.gov
(Presenting)
Jaime
E
Nickeson, Sigma Space Corp, jaime.e.nickeson@nasa.gov
Robert
E
Wolfe, NASA GSFC, robert.e.wolfe@nasa.gov
The Moderate Resolution Imaging Spectro-radiometer (MODIS) sensors currently provide a 10-year suite of land products essential to Earth system science. There are 11 MODIS land product types produced operationally by the land discipline team, each with varying levels of maturity (years of production) and validation status. The value of these products for science applications and research is dependent on the known accuracy of the data. The goal of the MODIS land validation group, in conjunction with the Land Product Validation (LPV) sub-group of the Committee on Earth Observation Satellites (CEOS) Working Group on Calibration and Validation (WGCV), is to foster the quantitative evaluation of geophysical products and convey accuracy assessment data and results to users. Product validation status is defined using a recently updated 4-stage hierarchical system that accounts for systematic validation as a product time-series expands. MODIS land products are validated using various techniques to develop uncertainty information including: direct comparisons with in-situ field data collected at Earth Observing System (EOS) core sites and scientific observation networks (e.g. FLUXNET, AERONET); comparisons with data and products from higher spatial resolution sensors (e.g. Landsat, ASTER, SPOT, IKONOS); as well as inter-comparison of trends derived from independently-obtained reference data and derived products. There are currently 34 EOS validation core sites that continue to provide the user community with ground, aircraft, and satellite data for science and validation investigations. Data archives for the core sites and annually updated validation status pages for each of the land products are located at the MODIS Validation webpage (http://landval.gsfc.nasa.gov/). The MODIS validation effort contributes to international activities by helping to establish standards and protocols for satellite land product validation.
Presentation Type: Poster
Poster Session: Data Records and Systems
NASA TE Funded Awards Represented:
Wolfe, Robert
Maintaining NASAs Land Product Validation Infrastructure and Using Related Data for Model Sensitivity Studies