Showing papers in "Remote Sensing of Environment in 1971"

TL;DR: In this paper, the non-Lambertian directional reflectance of a multilayer vegetative canopy is derived and the cause of the reflectance is traced to the properties of the biological elements of the canopy.

TL;DR: In this article, an extension of a previous directional reflectance model of vegetative canopies is presented to quantify the effect of solar flux illumination on the canopy's reflectance with azimuthal view angle.

TL;DR: In this article, measurements of the microwave emission from Arctic Sea ice were made with aircraft at 8 wavelengths ranging from 0.510 cm to 2.81 cm and the expected contrast in emissivities between ice and water was observed at all wavelengths.

TL;DR: Satellite imagery from four successful ERTS-1 passes over Delaware Bay during different portions of the tidal cycle are interpreted with special emphasis on visibility of suspended sediment and its use as a natural tracer for gross circulation patterns as mentioned in this paper.

TL;DR: In this article, the maize dwarf mosaic virus (MDMV)-infected, and Helminthosporium maydis -infected leaves possessed similar reflectivities in the visible range (0.4-0.75 μ) but significantly different reflectivity in the near infrared range ( 0.8-2.60 μ).

TL;DR: In this article, the results of an analysis of laser terrain profile data obtained with coincident photography from an altitude of 1000 ft over the sea ice fields of the Beaufort Sea in April 1968 were presented.

TL;DR: In this paper, the authors measured the directional variation in reflected solar radiation over soil surface and vegetation using scanning radiometer, using the same approach as the one we use in this paper.

TL;DR: In this article, a model for calculating the directional spectral reflectance of vegetative canopies was verified for the case of mature corn by field reflectance measurements on two different mature corn fields at each of two viewing angles and over the visible and near infrared spectral bands.

TL;DR: In this paper, the Raman backscatter from a pulsed laser was compared with measurements from meteorological instruments located on a tower, and the results indicated that water vapor profile measurement to a range of approximately 4 km is feasible with the lidar used in this experiment.

TL;DR: Crop surveys from multiband and multibase satellite photography during Apollo 9 mission, using statistical multispectral pattern recognition digital techniques as discussed by the authors, were performed using statistical multi-scale pattern recognition techniques.

TL;DR: The detection and measurement of oil pollution in the marine environment are receiving augmented attention, as the incidence of oil spills increases with a corresponding demand for information to direct cleanup operations and assign legal responsibility.

TL;DR: In this article, it was shown that the microwave emission of sea water is dependent upon salinity in the low microwave spectrum, and it appears possible to measure remotely surface salinity at 21-cm wavelength with an accuracy up to one part salt per thousand parts water (.1%) for a.5 to 3.5% salinity range.

TL;DR: In this article, an expression to evaluate the information content of solutions of the radiative transfer equation other than the minimum-rms solution is derived, which can be applied to the problem of selecting the spectral location and number of tropospheric channels for a remote temperature sounder.

TL;DR: In this article, the spectral reflectance and photometric properties of selected rocks at the USGS Mill Creek, Oklahoma, remote sensing test site demonstrate that discrimination of rock types is possible through reflection measurements, but that the discrimination is complicated by surface conditions, such as weathering and lichen growth.

TL;DR: In this paper, a ship's observations of surface temperature and salinity along the western edge of the Gulf Stream made from a ship and of concurrent temperature observations obtained by instrumented aircraft at six altitudes were compared with a theoretical model.

TL;DR: In this article, the analysis of information obtained with the multispectral scanning system of the ERTS-1 satellite in the form of images of the earth's surface (Northern California) in four spectral regions (channels) is presented.

TL;DR: In this article, the feasibility of discriminating agricultural crop types with color infrared photography taken in late July in northeastern Kansas was examined using a standard spot-reading color densitometer using coarse resolutions to crudely simulate photography from spacecraft altitudes.

TL;DR: In this article, a method is presented for the systematic comparison of the sensitivities of atmospheric sounders, which is illustrated by three examples: the first involves the comparison of two microwave radars, the second is a comparison of a microwave radar with an acoustic echo sounder, and the third one is an analysis of two continuous wave radars.

TL;DR: In this paper, eight hundred and thirty-five miles of selected traverses on the island of Puerto Rico were monitored via helicopter with a prototype single-channel gamma ray spectrometer.

TL;DR: In this paper, the results obtained from a statistical comparison of the laser and stereophotogrammetric sea ice profiles collected on that mission were presented, which showed agreement in the elevations of identifiable features to approximately 23 cm.

TL;DR: In this paper, the authors used an empirical formula for the water vapour absorption coefficient, which included a component proportional to the water vapor pressure, to account for the apparent temperature decrease.

TL;DR: In this article, a linear signature on the imagery and several ground truth positions of the ecotone in Canada were shown to be linear in expression and the position of the linear signature all across northern Canada was then mapped.

TL;DR: In this paper, the effect of water vapor on the velocity of electromagnetic signals through the atmosphere is dependent upon the signal frequency and the proper choice of frequencies, measurements of the differential phase delays of two signals may be used to indicate the water vapor averaged along a path of several to several hundred kilometers.

TL;DR: In this article, the surface morphology of an alluvial floodplain was examined using near-infrared photographic imagery and features such as abandoned meanders, channel course change, and floodplain terraces could be clearly distinguished.

TL;DR: Using colorenhanced infrared imagery from satellites for displaying temperature gradients and differences of ocean surface, the authors used color-enhanced IR images from satellites to calculate ocean surface temperature.