GPS Reflection Publications

Chew, C.C., E.E. Small, K.M. Larson, An Algorithm for Soil Moisture Estimation Using GPS Interferometric Reflectometry for Bare and Vegetated Soil, GPS Solutions, doi:10.1007/s10291-015-0462-4, 2016.
Larson, K.M., E.E. Small, Snow Depth Retrievals using L1 GPS SNR Data, IEEE JSTARS, doi:10.1109/JSTARS.2015.2508673, 2016.
Small, E.E., K.M. Larson, C.C. Chew, J. Dong, T.E. Oschner, Validation of GPS-IR Soil Moisture Retrievals: comparison of algorithms with different adjustments for vegetation effects, IEEE JSTARS, doi:10.1109/JSTARS.2015.2504527, 2016.
Chew, C., E.E. Small, K.M. Larson, V. Zavorotny, Vegetation Sensing Using GPS interferometric reflectometry: Theoretical Effects of Canopy Parameters on Signal to Noise Ratio Data, IEEE Trans. Geo. Rem. Sens., 53(5), doi:10.1109/TGRS.2014.2364513, 2015.
Larson, K.M., J. Wahr, P. Kuipers Munneke, Constraints on Snow Accumulation and Firn Density in Greenland Using GPS Receivers, J. Glaciology, 61(225), doi:10.3189/2015JoG14J130, 2015.
Wei, W., K.M. Larson, E.E. Small, C.C. Chew, J.J. Braun, Using GPS Receivers to Measure Vegetation Water Content, GPS Solutions, doi:10.1007/s10291-014-0383-7, 2015.
Chew, C, E. Small, K.M. Larson, V. Zavorotny, Effects of near-surface soil moisture on GPS SNR data: Development of a retrieval algorithm for volumetric soil moisture, IEEE Trans. Geo. Rem. Sens., 52(1), doi:10.1109/TGRS.2013.2242332, 2014.
Evans, S., E.E. Small, K.M. Larson, Comparison of vegetation phenology in the Western U.S. determined from reflected GPS microwave signals and NDVI, Int. Journ. Remote Sensing, 35(9), doi:10.1080/01431161.2014.894660, 2014.
Jones, M., M. Kimball, E. Small, K.M. Larson, Comparing Land Surface Phenology Derived from Satellite and GPS Network Microwave Remote Sensing, Int. Journ. Biometeorology., 58(6), doi:10.1007/s00484-013-0726-z, 2014.
Larson, K.M., E.E. Small, Normalized Microwave Reflection Index, part 1: A Vegetation Measurement Derived from GPS Networks, IEEE JSTARS, 7(5), doi:10.1109/JSTARS.2014.2300116, 2014.
Larson, KM, EE Small, GPS Ground Networks for Environmental Sensing, Proc. IGARSS, 2014.
McCreight, J., E.E. Small, K.M. Larson, Snow depth, density, and SWE derived from GPS reflection data: validation in the western U.S., Water Resources Research, 50(8), doi:10.1002/2014WR015561, 2014.
Nievinski, F.G., K.M. Larson, Forward modeling of GPS multipath for near-surface reflectometry and positioning applications, GPS Solutions, 18(2), doi:10.1007/s10291-013-0331-y, 2014.
Nievinski, F.G., K.M. Larson, Inverse modeling of GPS multipath for snow depth estimation, Part I: Formulation and simulations, IEEE Trans. Geosci. Rem. Sens., 52(10), doi:10.1109/TGRS.2013.2297681, 2014.
Nievinski, F.G., K.M. Larson, Inverse modeling of GPS multipath for snow depth estimation, Part II: Application and validation, IEEE Trans. Geosci. Rem. Sens., 52(10), doi:10.1109/TGRS.2013.2297688, 2014.
Nievinski, F.G., K.M. Larson, An open source GPS multipath simulator in Matlab/Octave, GPS Solutions, 18(3), doi:10.1007/s10291-014-0370-z, 2014.
Larson, K.M., J. Lofgren, R. Haas, Coastal Sea Level Measurements Using A Single Geodetic GPS Receiver, Adv. Space Research, 51(8), 2013.
Larson, K.M., F.G. Nievinski, GPS Snow Sensing: Results from the EarthScope Plate Boundary Observatory., GPS Solutions, 17(1), doi:10.1007/s10291-012-0259-7, 2013.
Larson, K.M., R. Ray, F. Nievinski, J.T. Freymueller, The Accidental Tide Gauge, IEEE GRSL, 10(5), doi:10.1109/LGRS.2012.2236075, 2013.
Larson, K.M., E.E. Small, Using GPS to study the Terrestrial Water Cycle, EOS, 94(52), 2013.
McCreight, J., E.E. Small, Modeling bulk density and snow water equivalent using daily snow depth observations, The Cryosphere, 8, doi:10.5194/tc-8-521-2014, 2013.
Nievinski, F.G., Forward and Inverse Modeling of GPS Multipath for Snow Monitoring, PhD Dissertation, University of Colorado, 2013.
Ochsner, T. et al., The State of the Art in Large-scale Soil Moisture Monitoring, Soil Science Society of America Journal, 77(6), doi:10.2136/sssaj2013.03.0093, 2013.
Gutmann, E., K. M. Larson, M. Williams, F. G. Nievinski, V. Zavorotny, Snow measurement by GPS interferometric reflectometry: an evaluation at Niwot Ridge, Colorado, Hydrological Processes, doi:10.1002/hyp.8329, 2012.
Larson, K. M., J. Braun, E. E. Small, V. Zavorotny, E. Gutmann, A. Bilich, GPS Multipath and Its Relation to Near-Surface Soil Moisture Content, IEEE J-STARS, 2010.
Small, E. E., K. M. Larson, J. Braun, Sensing Vegetation Growth Using Reflected GPS Signals, Geophysical Research Letters, 37(L12401), doi:10.1029/2010GL042951, 2010.
Zavorotny, V., K. M. Larson, J. Braun, E. E. Small, E. Gutmann, A. Bilich, A physical model of GPS multipath caused by land reflections: toward bare soil moisture retrievals, IEEE J-STARS, 2010.
Larson, K. M., E. Gutmann, V. Zavorotny, J. Braun, M. Williams, F. G. Nievinski, Can We Measure Snow Depth with GPS Receivers?, Geophysical Research Letters, 36(L17502), doi:10.1029/2009GL039430, 2009.
Larson, K. M., E. E. Small, E. Gutmann, A. Bilich, P. Axelrad, J. Braun, Using GPS multipath to measure soil moisture fluctuations: initial results, GPS Solutions, 12(3), doi:10.1007/s10291-007-0076-6, 2008.
Larson, K. M., E. E. Small, E. Gutmann, A. Bilich, J. Braun, V. Zavorotny, Use of GPS receivers as a soil moisture network for water cycle studies, Geophysical Research Letters, 35(L24405), doi:10.1029/2008GL036013, 2008.
Bilich, A., P. Axelrad, K.M. Larson, Scientific Utility of the Signal-to-Noise Ratio (SNR) Reported by Geodetic GPS Receivers, Proc. ION. (Note: these are results for older receivers and signals)., 2007.
Also see recent posters from the group.

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