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FIFE_SE_UNL SE-590 Ground Data: UNL (FIFE) BLAD, B.L.; WALTER-SHEA, E.A. SE-590 Ground Data: UNL (FIFE) 1994 Oak Ridge, Tennessee, U.S.A. Oak Ridge National Laboratory Distributed Active Archive Center Online Files doi:10.3334/ORNLDAAC/82 82

ABSTRACT: The SE-590 Reflectance Factors and Radiances from UNL Data Set contains surface reflectance and viewing angle data that was collected at three sites within the FIFE study area via a SE590 mounted on a portable mast. All measurements were made on eleven days between July 15 and August 11, 1989. Measurements were typically coordinated with aircraft and/or satellite overpasses. On days when measurements were not made the bare soil was covered with a plastic mulch that allowed moisture to penetrate the surface but hindered the regrowth of the vegetation. Solar radiation data at or near the specific site should be used to screen possible times of variable cloud cover. Canopy, illumination, and viewing geometry are critical in determining the amount of reflected radiation received at the sensor. The measurements were predominantly made in the solar principal plane since the greatest variation in observed reflected radiation is expected to occur in that plane due to extremes in sunlit and shaded portions of the canopy (Norman and Walthall 1985). Reflected radiation measurements were converted to radiances and reflectance factor. Reflected radiation from a field reference panel corrected for non-perfect reflectance and sun angle was used as an estimate of the ideal Lambertian standard surface (Walter-Shea and Biehl 1990).

1989-06-15 1989-08-11 COMPLETE 39.05 39.09 -96.55 -96.54 ESIP Earth Science Information Partners Program EOSDIS Earth Observing System Data Information System TECHNICAL CONTACT ORNL DAAC User Services ORNL DAAC USER SERVICES OFFICE OAK RIDGE NATIONAL LABORATORY OAK RIDGE, TENNESSEE 37831 USA DIF AUTHOR ORNL DAAC User Services ornldaac@ornl.gov (865) 241-3952 (865) 574-4665

ORNL DAAC User Services Office

P.O. Box 2008, MS 6407

Oak Ridge National Laboratory

Oak Ridge Tennessee 37831-6407 USA 1994-07-24 ORNL_DAAC THE OAK RIDGE NATIONAL LABORATORY (ORNL) DISTRIBUTED ACTIVE ARCHIVE CENTER (DAAC) http://daac.ornl.gov/ 82 DATA CENTER CONTACT ORNL DAAC USER SERVICES ornldaac@ornl.gov +1(865)241-3952 +1(865)574-4665

ORNL DAAC USER SERVICES OFFICE

P.O. Box 2008, MS 6407

Oak Ridge National Laboratory

Oak Ridge Tennessee 37831-6407 USA EARTH SCIENCE ATMOSPHERE ATMOSPHERIC RADIATION REFLECTANCE SPECTRORADIOMETERS FIELD INVESTIGATION EARTH SCIENCE EOSDIS RADIATIVE PROCESSES GET DATA http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=82 VIEW RELATED INFORMATION https://daac.ornl.gov//FIFE/guides/SE-590_Ground_Data_UNL.html SE-590 Ground Data: UNL (FIFE) USA/NASA ENGLISH GCMD CEOS IDN DIF VERSION 9.0