Real-time Ionospheric Tomography Using Terrestrial GPS Sensors (2007)
We present a novel technique for estimating the four-dimensional state of the ionosphere based on tomography using a terrestrial based reference network. The two key innovations in this technique are...
Landscape Ecology vol. 7 no. 3 pp 163-180 (1992) SPB Academic Publishing bv, The Hague (2007)
Avian Response To, Andrew J. Hansen, Dean L. Urban
We suggest that the life histories of species within communities may differ among geographic locations and that communities from distinct biomes may respond uniquely to a given trajectory of...
Science Priorities for Reducing the Threat of Invasive Species to Sustainable Forestry (2005)
ELIZABETH A. CHORNESKY, ANN M. BARTUSKA, GREGORY H. APLET, KERRY O. BRITTON, JANE CUMMINGS-CARLSON, FRANK W. DAVIS, ...
Invasive species pose a major, yet poorly addressed, threat to sustainable forestry. Here we set forth an interdisciplinary science strategy of research, development, and applications to reduce this...
Science Priorities for Reducing the Threat of Invasive Species to Sustainable Forestry (2005)
Chornesky, Elizabeth A, Bartuska, Ann M, Aplet, Gregory H, Britton, Kerry O, Cummings-Carlson, Jane, Davis, Frank W, ...
Invasive species pose a major, yet poorly addressed, threat to sustainable forestry. Here we set forth an interdisciplinary science strategy of research, development, and applications to reduce this...
Ecological Causes and Consequences of Demographic Change in the New West (2002)
ANDREW J. HANSEN, RAY RASKER, BRUCE MAXWELL, JAY J. ROTELLA, JERRY D. JOHNSON, ANDREA WRIGHT PARMENTER, ...
Global Change in Forests: Responses of Species, Communities, and Biomes (2001)
ANDREW J. HANSEN, RONALD P. NEILSON, VIRGINIA H. DALE, CURTIS H. FLATHER, LOUIS R. IVERSON, DAVID J. CURRIE, ...
Models for Guiding Management of Prairie Bird Habitat in Northwestern North Dakota (2000)
ELIZABETH M. MADDEN, ROBERT K. MURPHY, ANDREW J. HANSEN, LEIGH MURRAY
With grassland bird populations in the Great Plains exhibiting steep declines, grassland managers require information on bird habitat needs to optimally manage lands dedicated to wildlife. During...
Ionospheric correction using tomography (1997)
Andrew J. Hansen, Todd Walter, Per Enge
The most demanding application of wide area di erential corrections to GPS is vertical positioning of aircraft on precision approach. Here the Wide Area Augmentation System (WAAS) combines accuracy...
Ionospheric estimation and integrity threat detection (1997)
Hansen's research is focused on ionospheric estimation using tomographic inversion and integrity monitoring of WAAS ionospheric corrections. Y.C. Chao is a Ph.D student of Aeronautics and...
Thesis (M.S.)--Worcester Polytechnic Institute.