This data set includes ground-based radar observations carried out at the Fraser Experimental Forest Headquarters, Colorado, USA (39.95 N, 105.9 W), between 17-26 February and 26-30 March 2003. Truck-mounted L- and Ku-band scatterometers were used to collect fully polarimetric backscattering coefficients of snow. The calibrated radar systems measured the amplitude and phase of backscattered signal ... over a relatively wide bandwidth at L-band (1.1-1.4 GHz) and Ku-band (15.25-15.75 GHz). Backscatter measurements of an open snow pack were collected at three different incidence angles (20, 35, and 50 degrees) several times a day. This data set is part of the NASA Cold Land Processes Field Experiment (CLPX). The NASA CLPX is a multi-sensor, multi-scale experiment that focuses on extending a local-scale understanding of water fluxes, storage, and transformations to regional and global scales. Within a framework of nested study areas in the central Rocky Mountains of the western United States, ranging from 1-ha to 160,000 km2, intensive ground, airborne, and spaceborne observations are collected. Data collection focuses on two seasons: mid-winter, when conditions are generally frozen and dry, and early spring, a transitional period when both frozen and thawed, dry and wet conditions are widespread.
(Click for Interactive Map)
Data Set Citation
CLPX-Ground: Ground-based L and Ku band polarimetric scatterometry
Dataset Release Date:
Dataset Release Place:
Boulder, CO, USA
National Snow and Ice Data Center (NSIDC)
National Weather Service
National Operational Hydrologic Remote Sensing Center
1735 Lake Drive W.
Province or State:
Tassoudji, M. A., K. Sarabandi and F.T. Ulaby, Design consideration and implementation of the LCX polarimetric scatterometer (POLARSCAT), RadiationLaboratory Report No 022486-T-2, The University of Michigan, June 1989.
Kendra, J. R., Microwave Remote Sensing of Snow: An Empirical/Theoretical Scattering Model for Dense Random Media. Ph. D. thesis, Univ. of Michigan, Sept.1995.
Ulaby, F.T., ... C. Elachi, Radar Polarimetry for Geoscience Applications, Dedham MA: Artech House, Inc., 1990.
Sarabandi, K. and F.T. Ulaby, A convenient technique for polarimetric calibration of single-antenna radar systems, IEEE Trans. Geosci. Remote Sensing, Vol. 28, pp 1022-1033, 1990.
Sarabandi, K., F.T. Ulaby, and M.A. Tassoudji, Calibration of polarimetric radar systems with good polarization isolation, IEEE Trans. Geosci. Remote Sens., Sept. 1989.
Sarabandi, K., Y. Oh, and F.T. Ulaby, Measurement and calibration of differential Mueller matrix of distributed targets, IEEE Trans. Antennas Propagat., Vol. 40, pp 1524-1532, 1992.
Ulaby, F.T., R.K. Moore, and A.D. Fung, Microwave Remote Sensing: Active and Passive, Vol 1, Dedham, MA: Artech House, Inc., 1986.