Record Details

Record 1 of 1
Recent Efforts to Improve the Near Real Time Forest Disturbance Monitoring Capabilities of the ForWarn System
Author and Affiliation:
Spruce, Joseph(NASA Stennis Space Center, Stennis Space Center, MS, United States);
Hargrove, William(Department of Agriculture, United States);
Gasser, Gerald(Lockheed Engineering and Sciences Co., Bay Saint Louis, MS, United States)
Abstract: This presentation discusses the development of anew method for computing NDVI temporal composites from near real time eMODIS data This research is being conducted to improve forest change products used in the ForWarn system for monitoring regional forest disturbances in the United States. ForWarn provides nation-wide NDVI-based forest disturbance detection products that are refreshed every 8 days. Current eMODIS and historical MOD13 24 day NDVI data are used to compute the disturbance detection products. The eMODIS 24 day NDVI data re-aggregated from 7 day NDVI products. The 24 day eMODIS NDVIs are generally cloud free, but do not necessarily use the freshest quality data. To shorten the disturbance detection time, a method has been developed that performs adaptive length/maximum value compositing of eMODIS NDVI, along with cloud and shadow "noise" mitigation. Tests indicate that this method can reduce detection rates by 8-16 days for known recent disturbance events, depending on the cloud frequencies and disturbance type. The noise mitigation in these tests, though imperfect, helped to improve quality of the resulting NDVI and forest change products.
Publication Date: Jan 07, 2013
Document ID:
20130003517
(Acquired Jan 29, 2013)
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Report/Patent Number: SSTI 2220-0245
Document Type: Conference Paper
Meeting Information: U.S. Regional Association of the International Association for Landscape Ecology (US-IALE) 2013 Annual Symposium; 14-18 Apr. 2013; Austin, TX; United States
Contract/Grant/Task Num: NNS10AA35C; NNS04AB54T; USFS3PCC00; C04843.01372
Financial Sponsor: NASA Stennis Space Center; Stennis Space Center, MS, United States
Organization Source: NASA Stennis Space Center; Stennis Space Center, MS, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CLOUDS (METEOROLOGY); NORMALIZED DIFFERENCE VEGETATION INDEX; REAL TIME OPERATION; FORESTS; DETECTION; HISTORIES; EARTH SCIENCES
Availability Source: Other Sources
Availability Notes: Abstract Only
› Back to Top
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed
Find Similar Records
 
NASA Logo, External Link

NASA Official: Gerald Steeman

Sponsored By: NASA Scientific and Technical Information Program

Site Curator: STI Support Services

Last Modified: January 29, 2013

Privacy Policy & Important Notices Disclaimers, Copyright, Terms of Use Freedom of Information Act USA.gov NASA.gov NASA OCIO Free Adobe PDF Reader Free MS Word Viewer