An apparatus was built for this experiment, to allow a four meter diameter pseudo plot to be rotated beneath a Landsat band radiometer mounted 8.8 meters above the `plot'. The pseudo plot consisted of several .3 x .3 x .6 meter boxes of soybeans aligned in rows. The backgrounds were trays of Russell soils or boards painted with 3M flat black and 3M flat white to allow for a wide range in reflectance backgrounds. The pseudo plot is easily rotated to obtain any desired row direction.
Data were obtained for three soil covers, three backgrounds, and 37 row directions for several solar zenith-azimuth ranges. Data were collected on three different days.
LARSPEC Identification Record Codes:
1. Plot Number
_______________________________________________________ Plot Description Number _______________________________________________________ 841 Soybeans - 100% soil cover 842 Russell soil - 0% soil cover 843 3M flat black - 0% 'soil' cover 844 3M flat white - 0% 'soil' cover 851 Soybeans in rows with soil background 901 Soybeans in rows with 3M flat black background 951 Soybeans in rows with 3M flat white background _______________________________________________________2. Experimenter Parameter 02 (additional information)
Experimenter parameter 02 is a unique observation code for each scene (soil, 3M flat black, soybean/soil background, etc.) and row direction.
_______________________________________________________ Experimenter Description Parameter 02 _______________________________________________________ 841 Soybean - 100% soil cover 842 Russell soil 843 3M flat black 844 3M flat white 851-887 37 row directions of soybeans/soil, 270, 265, 260, ... 90 degrees, respectively 901-937 37 row directions of soybeans/black, 270, 265, 260, ... 90 degrees, respectively 951-987 37 row directions of soybeans/white, 270, 265, 260, ... 90 degrees, respectively _______________________________________________________This experimenter parameter is envisioned to be used when updating the identification records.
3. Scene Type
The number after the scene description, eg. SOY/SOIL 0, represents the angular postion of the turntable per predefined marks. The angular position given in the scene type is related to the row direction by: row direction = 270 - angular position of the turntable.