2,661 research outputs found
Labeling research in support of through-the-season area estimation
The development of LANDSAT-based through-the-season labeling procedures for corn and soybeans is discussed. A model for predicting labeling accuracy within key time periods throughout the growing season is outlined. Two methods for establishing the starting point of one key time period, viz., early season, are described. In addition, spectral-temporal characteristics for separating crops in the early season time period are discussed
Analysis of scanner data for crop inventories
There are no author-identified significant results in this report
The usefulness of thermal infrared and related imagery in the evaluation of agricultural resources. An exploratory study, volume I Final report
Multispectral imagery for aerial inventory and analysis of cultivated crop resource
Application of remote sensing to selected problems within the state of California
Specific case studies undertaken to demonstrate the usefulness of remote sensing technology to resource managers in California are highlighted. Applications discussed include the mapping and quantization of wildland fire fuels in Mendocino and Shasta Counties as well as in the Central Valley; the development of a digital spectral/terrain data set for Colusa County; the Forsythe Planning Experiment to maximize the usefulness of inputs from LANDSAT and geographic information systems to county planning in Mendocino County; the development of a digital data bank for Big Basin State Park in Santa Cruz County; the detection of salinity related cotton canopy reflectance differences in the Central Valley; and the surveying of avocado acreage and that of other fruits and nut crops in Southern California. Special studies include the interpretability of high altitude, large format photography of forested areas for coordinated resource planning using U-2 photographs of the NASA Bucks Lake Forestry test site in the Plumas National Forest in the Sierra Nevada Mountains
Application of remote sensing to selected problems within the state of California
There are no author-identified significant results in this report
Radiation effects in silicon solar cells Quarterly report
Effect of lithium on production and annealing of damage in silico
Radiation effects in silicon solar cells Quarterly progress report, 1 Jul. - 30 Sep. 1970
Defects responsible for degradation in output of silicon solar cells irradiated by space radiatio
Users manual for the US baseline corn and soybean segment classification procedure
A user's manual for the classification component of the FY-81 U.S. Corn and Soybean Pilot Experiment in the Foreign Commodity Production Forecasting Project of AgRISTARS is presented. This experiment is one of several major experiments in AgRISTARS designed to measure and advance the remote sensing technologies for cropland inventory. The classification procedure discussed is designed to produce segment proportion estimates for corn and soybeans in the U.S. Corn Belt (Iowa, Indiana, and Illinois) using LANDSAT data. The estimates are produced by an integrated Analyst/Machine procedure. The Analyst selects acquisitions, participates in stratification, and assigns crop labels to selected samples. In concert with the Analyst, the machine digitally preprocesses LANDSAT data to remove external effects, stratifies the data into field like units and into spectrally similar groups, statistically samples the data for Analyst labeling, and combines the labeled samples into a final estimate
Free Unstable Modes and Massive Bodies in Saturn's Outer B Ring
Voyager images and Cassini occultation data have previously shown that the
behavior of the outer edge of Saturn's massive B ring is determined only in
part by a static response to the 2:1 inner Lindblad resonance with Mimas. In
Cassini images of this region, we find, in addition to the expected
wavenumber-2 forced distortion, evidence for unforced self-excited
wavenumber-3, wavenumber-2, and wavenumber-1 normal modes. These are the first
observations to suggest substantial wave amplification in Saturn's broad rings.
Moreover, the presence of these free modes strongly implicates viscous
overstability as their underlying cause and, by inference, the cause for most
if not all of the unforced structures throughout the high-mass-density B ring
and in other high-mass-density regions in Saturn's rings. Analysis of each of
the inferred waves reveals a consistent lower bound on the average surface mass
density of ~ 44 g/cm^2 for the outer 250 km of the ring, though the true
surface density could be as high as 100 g/cm^2 or higher. Interference between
the forced and free wavenumber-2 modes yields a total wavenumber-2 pattern that
varies in amplitude and orientation with a characteristic period of ~ 5.5
years. We also find localized disturbances, including 3.5-km-tall vertical
structures, that provide circumstantial evidence for embedded massive bodies in
the Mimas resonance zone. The presence of such bodies is supported by the
presence of a shadow-casting moonlet ~ 0.3 km wide near the ring's edge.Comment: 38 pages, 6 figure
Use of ERTS-1 data to assess and monitor change in the Southern California environment
There are no author-identified significant results in this report
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