Showing papers in "Remote Sensing of Environment in 1985"

TL;DR: In this paper, the spectral behavior of a cotton canopy with four soil types alternately inserted underneath was examined at various levels of vegetation density, showing that soil and plant spectra interactively mix in a nonadditive, partly correlated manner to produce composite canopy spectra.

TL;DR: In this article, a strong correlation between the integrated NOAA-7 satellite data and end-of-season above-ground dry biomass was found for ground samples collected over a 3-year period.

TL;DR: In this article, a transformation of TM-waveband reflectance-factor data which provides features related as directly as possible to the corresponding TM Tasseled Cap brightness, greennes, and wetness features is presented.

TL;DR: In this paper, the differential equations describing radiative transfer in vegetative canopies are generalized and solved to derive a layer scattering matrices, which can be applied to the calculation of optical parameters for multilayer ensembles according to the Adding method.

TL;DR: In this article, the statistical relationship between remotely sensed thermal emissions and reflected spectral radiance was investigated for a complex vegetated land area, for a site near Hartford, CT on a single date.

TL;DR: In this paper, a comparison of how n-spaced and ratio-based vegetation indices respond to rock and soil spectral variation is made, using a set of ground-based reflectance spectra and airborne Thematic Mapper imagery of the Virginia Range, NV.

TL;DR: In this article, the authors used the heat capacity mapping mission (HCMM) data at times of day favorable for estimation of surface thermal properties and the surface energy budget, which is potentially misleading in agricultural areas because surface evaporation reduces the amplitude of the soil heat flux compared to the amplitude in dry areas.

TL;DR: In this paper, the relationship between photosynthetically active radiation (PAR) absorbed by corn canopies and spectral reflectance of the canopy was investigated with a LANDSAT MSS band radiometer.

TL;DR: In this paper, the relationship between directional reflectances spanning the entire reflecting hemisphere and hemispherical reflectance (albedo) and the effect of solar zenith angle and cover type on these relationships were investigated, using the results obtained from NOAA's 7/8 AVHRR ground-level reflectance measurements.

TL;DR: In this paper, the authors analyzed the dynamics of the observed reflectance distributions and those reported in the literature and validated physical principles that cause the reflectance distribution dynamics as proposed by field and simulation studies.

TL;DR: In this article, the influence of management practices and solar illumination angle on the leaf area index (LAI) was estimated from measurements of wheat canopy reflectance evaluated by two methods, a regression formula and an indirect technique.

TL;DR: In this paper, the effects of sun and view angles on bidirectional reflectance factors from corn (Zea mays L.) canopies ranging in development from the six leaf stage to harvest maturity were examined.

TL;DR: In this paper, the authors evaluated evapotranspiration by combining remotely sensed reflected solar radiation and surface temperatures with ground station meteorological data (incoming solar radiation, air temperature, windspeed, and vapor pressure) to calculate net radiation and sensible heat flux.

TL;DR: In this paper, multispectral reflectance and thermal emittance data were used in conjunction with micrometeorological data in a simple model to estimate above-ground total dry phytomass production of several spring wheat canopies.

TL;DR: In this paper, the microwave radiometric measurements made by the Skylab 1.4 GHz and by the 6.6 GHz and 10.7 GHz channels of the Nimbus-7 Scanning Multichannel Microwave Radiometer were analyzed to study the large-area soil moisture variations of land surfaces.

TL;DR: In this article, a Mark II radiometer was used to estimate the off-nadir to nadir radiance in the NIR band (0.76-0.90 μm) for wheat canopies.

TL;DR: In this paper, the atmospheric modulation transfer function (MTF) is used in Fourier transform analyses to simulate the atmospheric effect on the imagery of a non-uniform surface and to demonstrate the effect of the MTF on separability of field classes.

TL;DR: In this paper, the spectral regions (seven bands in four major spectral regions for TM versus four bands in two regions for MSS) were evaluated to stimulate all possible combinations of these MSS and TM parameters.

TL;DR: In this article, a statistical modeling approach was used to predict the green leaf area index (LAI) of oats from bidirectional reflectance data collected with multiband radiometers, and two sets of spectral reflectance factors accounted for 73 percent and 65 percent of the variance in green LAI of oats.

TL;DR: In this article, the use of an inexpensive multiband video system that provides narrowband imagery within the visible/near-infrared region for assessment of vegetal condition and discrimination of plant species.

TL;DR: In this paper, spectral reflectance data were obtained for winter wheat over a full growing season and four irrigation treatments, applied to six genotypes, provided a variety of crop growth conditions.

TL;DR: In this article, the normalized vegetation index (NVI) was calculated from afternoon overpasses of NOAA-7 for two important farming regions of New Zealand, approximately 1000 k 2 in area, for the period from October 1981 through June 1984.

TL;DR: In this paper, reflectance and agronomic Thematic Mapper (TM) data were analyzed to determine possible data transformations for evaluating several plant parameters of corn, and three transformation forms were used: the ratio of two TM bands, logarithms of two-band ratios and normalized differences of two bands.

TL;DR: In this paper, the authors evaluated the performance of the Suits and SAIL models, taking into account two data sets on soybean and corn, and found that the tested models have significant deficiencies.

TL;DR: In this paper, the variability from wind on spectral reflectance of crop canopies was quantified and minimized by quantifying and minimizing the variability of spectral reflectances from wind.

TL;DR: In this article, the spectral reflectance of granitic rocks was analyzed using visible and near infrared spectra (400-1100 nm) of the rock and lichen samples collected from bedrock exposures and talus slopes.

TL;DR: In this paper, a study conducted in order to determine the rate of changes in spectral properties of detached leaves and to evaluate the effectiveness of low temperature and cytokinins for delaying the changes, is examined.

TL;DR: A pair of algorithms, run in sequence, were designed to sort the 57 coregistered images which were collected from the satellite NOAA-6 for the Coastal Ocean Dynamics Experiment (CODE) in 1981, finding some variations in input parameters from one image to the next were found to be essential to retain all reasonably cloud-free data.

TL;DR: Fifty-six multispectral imaging systems have been used during the past decade for earth resources studies from aircraft or spacecraft, or are currently in the proposal or design and development stage.

TL;DR: In this paper, the same model has been applied to corn and soybeans using Landsat-4 Thematic Mapper (TM) data combined with simulated TM data to provide a multitemporal data set in TM band intervals.