Rufus E. Bruce

Experimental Study of the Relationship Between Radiosonde Temperatures and Satellite-Derived Temperatures

Abstract A large sample of temperature observations was statistically analyzed to estimate horizontal temperature variability as a function of distance. These estimates were determined at several altitudes from the surface to 15 km and are applicable to horizontal distances up to 175 km, from a data set collected at White Sands Missile Range,. N. M. The results were used to assess the amount of disagreement one should expect when comparing radiosonde temperature measurements with corresponding measurements derived from satellite radiometric observations. The conclusion was that horizontal temperature variations over the radiometrically observed area contribute approximately 1 K rms disagreement between such comparisons. When the separation distance between the radiosonde and satellite observation approaches 200 km, rms differences of greater than 2 K are to be expected at this location.

Discussion on Equivalence Methods for Inhomogeneous Paths

Abstract Weinreb and Neuendorffer have demonstrated a new method for applying infrared homogeneous band models to slant path atmospheric attenuation calculations. The relation between this and the Curtis-Godson equivalence method is examined, and it shown that they are identical in the limits of weak- and strong-line absorption.

CALIBRATION PROCEDURE FOR EXTENDING THE VERSATILITY OF THERMOVISION SYSTEMS.

In this paper a field calibration procedure for the AGA 680 Thermovision system is described. The procedure is necessary because there are numerous uses of a thermovision system for which the standard calibration curves supplied by the manufacturer are inadequate. These uses include measurements with bandpass filtered optics, as well as measurements of radiance. In effect, the system may be calibrated so that it serves as a field radiometer.

An Ir System For Measurement Of The Spatial, Temporal And Spectral Distributions Of Radiating Sources--Calibration And Spectral Properties

An infrared system for measuring the spatial, temporal and low resolution spectral distributions of radiating sources is described. The system has three main subassemblies: a Data Acquisition subsystem consisting of a selectively filtered spatially scanning IR camera; a Display and Preprocessing subsystem; and a Digital Video Process subsystem. Unique features of the system include data display components which provide grey scale, two configurations of pseudo-color, and 3-D graphical displays, a video digitizing interface, and an interim storage facility. The system can be operated in a real-time or delayed playback mode. The IR Scanner camera (AGA System 680 Thermovision) provides 16 frames per second of an optional 10 X 10 or 2 X 2 fields-of-view, with 1.3 or .3 millirad instantaneous fields-of-view, respectively. Spectral content is obtained by changing discrete bandpass filters. System characteristics, atmospheric attenuation corrections and calibration procedures for direct source radiance determination from pseudo-color displays are given.

An Ir System For Measurement Of The Spatial, Temporal And Spectral Distributions Of Radiating Sources--System Versatility

A system for measuring the spatial, temporal and low resolution (visible and IR) spectral distributions of radiating sources is described. The system has three main subassemblies: A Data Collection system of five standard and special purpose visable and IR scanning cameras; a Preprocessing and Display system capable of handling digital or analog data and containing an interim storage facility; and a Digital Video Processing system. Unique features include data display subsystems which provide grey scale, two configurations of pseudo-color and a 3-D graphical displays. The system can be operated in a real-time or delayed playback mode. Discussed in this paper are the features of the several input devices and the system characteristics and capabilities. The time history of the spatial distribution of source radiance in each of several spectral bands regions can be visually displayed. The display system is used for preliminary analysis and selection of data for off line digital computer analysis.

Effect of the cluster integrals on three particles on the calculated electron density of a hydrogen plasma

The effect of the calculation of the cluster integrals on three particles is analyzed and evaluated for a hydrogen plasma where a pairwise‐additive hard sphere‐Coulomb potential is assumed. The Mayer cluster integral method was used to calculate the Helmholtz free energy which was then applied to the calculation of the electron number density through an iterative technique using a corrected Saha equation. It is seen that the three particle integrals provide a substantial correction to the calculations in the low energy‐high density region of the hydrogen plasma.