The objective of this experiment was to provide a data set which can be used as an intermediate level of extrapolation between data collected from contolled experimental plots at field research stations and data collection by satellite scanners. The purpose of the experiment is to study the spectral characteristics and separability of corn, soybeans, oats, and pasture as a function of growth stage and cultural practices. The intensive test site represents a 5 by 6 mile area over commercial fields. The major crops in this intensive test site are corn and soybeans. Other crops in the site include grass (pasture) and oats along with some fields with no cover (bare soil). This the second year for an experiment at this site.
Data were collected by a helicopter mounted Field Spectrometer System (FSS). The FSS system is based on a S191-H spectroradiometer. Data were collected for 6 lines running E-W across the test site. The FSS spectral data consists of .02 um wide bands from 0.4 to 1.1 um, .05 um wide bands from 1.1 to 2.4 um and 0.5 um wide bands from 8.0 to 14.0 um. The spectral data collected over the site are processed into two different formats. One format represents all individual observations collected over each field (termed single scan data) and the other format represents the average of all similar scans within each field (field averaged data).
The FSS data includes:
- Bidirectional reflectance factor data
- 70-millimeter boresight color photographs
- Flight logs
- Supporting agronomic, meteorological and atmospheric observations.
The study took place in 1980.
The supporting docs include a brief summary of used instruments, a wavelength table (Wavelength_ASCII.txt), reflectance note and reflectance tables (ReflectanceTable206.txt and ReflectanceTableMulti.txt), and file format description (ExperimentDataFormat3.txt). The format description file is in ASCII format in lines of 80 characters.
This research dataset is part the Field Research Data Library that consists of over 200,000 spectral observations of soils and vegetation that have been collected since 1972 till 1991 as part of the research focused on vegetation and soils at the Laboratory for Applications of Remote Sensing (LARS) located at the Purdue University.
Cite this work
Researchers should cite this work as follows:
- Location: "Commercial Fields";, Des Moines, IA
- County: Webster
- Latitude/Longitude: 0422300N / 0941000W
- Illumination: Solar
- Experiment Type: Crops - Corn, Grass, Soil, Soybeans
- Radiometer: Helicopter-mounted FSS
- Wavelength Range: 0.40-2.40 um