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The BOREAS RSS-17 team acquired and analyzed imaging radar data from the ESA's ERS-1 over a complete annual cycle at the BOREAS sites in Canada in 1994 to detect shifts in radar backscatter related to varying environmental conditions. This data set consists of dielectric constant profile measurements from selected trees at various BOREAS flux tower sites. The relative dielectric constant was measured at C-band (frequency = 5 GHz) as a function of depth into the trunk of three trees at each site. Measurements were made during April 1994 with an Applied Microwave Corporation field PDP fitted with a 0.358-cm (0.141-inch) diameter coaxial probe tip.

A guide document which includes more information about this data set can be found at

ORNL DAAC maintains information on the entire BOREAS Project.

Data Citation

Cite this data set as follows:

Way, J., K. McDonald, and R. Zimmermann. 1998. BOREAS RSS-17 Dielectric Constant Profile Measurements. Data set. Available on-line [] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.


Brunfeldt, D.R.. 1997. Theory and Design of a Field-Portable Dielectric Measurement System. Proc. of the 1987 International Geoscience and Remote Sensing Symposium. Ann Arbor, Michigan, May 18-21, pp. 559-563.

Dobson, M.C., "Calibration of field portable dielectric probes for use in radar experiments." May 1990. Radiation Laboratory Technical Report. The University of Michigan, Ann Arbor.

Hogg, E. H., T. A. Black, G. den Hartog, H. H. Neumann, R. Zimmerman, P. A. Hurdle, P. D. Blanken, Z. Nesic, P. C. Yang, R. M. Staebler, K. McDonald, and R. Oren. 1997. A Comparison of Sap Flow and Fluxes of Water Vapour from a Boreal deciduous forest. Journal of Geophysical Research (JGR), BOREAS Special Issue, 102(D24), Dec. 1997, pp. 28929-28937.

Sellers, P. and F. Hall. 1994. Boreal Ecosystem-Atmosphere Study: Experiment Plan. Version 1994-3.0, NASA BOREAS Report (EXPLAN 94).

Sellers, P., F. Hall, H. Margolis, B. Kelly, D. Baldocchi, G. den Hartog, J. Cihlar, M.G. Ryan, B. Goodison, P. Crill, K.J. Ranson, D. Lettenmaier, and D.E. Wickland. 1995. The boreal ecosystem-atmosphere study (BOREAS): an overview and early results from the 1994 field year. Bulletin of the American Meteorological Society. 76(9):1549-1577.

Sellers, P., F. Hall, and K.F. Huemmrich. 1996. Boreal Ecosystem-Atmosphere Study: 1994 Operations. NASA BOREAS Report (OPS DOC 94).

Sellers, P. and F. Hall. 1996. Boreal Ecosystem-Atmosphere Study: Experiment Plan. Version 1996-2.0, NASA BOREAS Report (EXPLAN 96).

Sellers, P., F. Hall, and K.F. Huemmrich. 1997. Boreal Ecosystem-Atmosphere Study: 1996 Operations. NASA BOREAS Report (OPS DOC 96).

Sellers, P. J., F. G. Hall, R. D. Kelly, A. Black, D. Baldocchi, J. Berry, M. Ryan, K. J. Ranson, P. M. Crill, D. P. Lettenmaier, H. Margolis, J. Cihlar, J. Newcomer, D. Fitzjarrald, P. G. Jarvis, S. T. Gower, D. Halliwell, D. Williams, B. Goodison, D. E. Wickland, and F. E. Guertin. 1997. BOREAS in 1997: Experiment Overview, Scientific Results and Future Directions. Journal of Geophysical Research 102 (D24): 28,731-28,770.

Way, J.B., R. Zimmermann, E. Rignot, K. McDonald, and R. Oren. Winter and spring thaw as observed with imaging radar at BOREAS. Journal of Geophysical Research (JGR), BOREAS Special Issue, 102(D24), Dec. 1997, pp. 29673-29684.

Data Format:

For information on Parameter/Variable Names, Variable Description/Definition, Units of Measurement, and Data File Format see this companion file

Document Information:

07-Dec-98 (data citation revised on 26-Sep-2002)

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