Journal Article10.1109/JRPROC.1955.277956
Survey of Airborne Microwave Refractometer Measurements
C. M. Crain
- 01 Oct 1955
- Vol. 43, Iss: 10, pp 1405-1411
36
TL;DR: A summary of airborne refractive index measurements which have been made at many locations in the United States both over land and off the east and west coasts, by several organizations is presented in this article.
read more
Abstract: This paper presents a summary of airborne refractive index measurements which have been made at many locations in the United States both over land and off the east and west coasts, by several organizations. Included are the results of studies of the mean vertical structure of the index of refraction of the atmosphere as a function of such factors as location, season, horizontal distance, and time. Included also are the results of measurements of the fine detail variations of refractive index about its mean value at several locations for altitudes up to 20,000 feet mean sea level.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Optical heterodyne detection of an atmospherically distorted signal wave front
D.L. Fried
- 01 Jan 1967
TL;DR: In this article, the effect of atmospheric distortion on the performance of an optical heterodyne detection system is examined theoretically and an exact expression relating the distortion to the detector signal-to-noise ratio is derived.
394
Partial reflection and scattering of VHF radar signals from the clear atmosphere
Jürgen Röttger,C. H. Liu +1 more
TL;DR: In this article, the received power due to partial reflection and turbulence scattering of VHF radar echoes from the clear atmosphere is estimated under rather general conditions and partial reflections from stratified layers in the atmosphere can contribute significantly to the received echo power and therefore should be considered in data interpretation.
186
A reflection theory for propagation beyond the horizon
TL;DR: In this article, the propagation of short radio waves beyond the horizon is discussed in terms of reflection from layers in the atmosphere formed by relatively sharp gradients of refractive index, and the dependence of the propagation on path length, antenna size and wavelength is obtained.
77
Radio-wave scattering by tropospheric irregularities
TL;DR: The subject of radio-wave scat tering by t urbulen t irregu lari t ies in t he t ropospheri c index of refraction is reviewed in this article.
XGB Model : Research on Evaporation Duct Height Prediction Based on XGBoost Algorithm
TL;DR: EXtreme Gradient Boosting (XGBoosting) algorithm is applied to the field of evaporation duct for the first time and it is shown that the generalization ability of XGB model is better than that of MLP model.
41
References
Frequency Stabilization of Microwave Oscillators
R.V. Pound
- 01 Dec 1947
TL;DR: In this article, two electronic circuits for frequency stabilization of electronically tunable microwave oscillators are described and discussed, one using a microwave circuit equivalent to the lowfrequency discriminator, in conjunction with a d.c. amplifier, to control the oscillator frequency at the frequency of a cavity resonator.
62
An Airborne Microwave Refractometer
C. M. Crain,A. P. Deam +1 more
TL;DR: In this paper, the change in resonant frequency of a cavity resonator exposed to atmospheric air is recorded continuously, thus giving a continuous recording of atmospheric index of refraction relative to an arbitrary reference.
25
Measurement of variations in atmospheric refractive index with an airborne microwave refractometer
H.E. Bussey,Birnbaum +1 more
TL;DR: In this article, a micro-refractometer for aircraft use is described, and some of the sources of error in the measuremen t of variations of a t mospheric refractive index with t his instrumen t a re discussed.
Recent Developments in Frequency Stabilization of Microwave Oscillators
W. G. Tuller,W. C. Galloway,F. P. Zaffarano +2 more
- 01 Jun 1948
TL;DR: In this paper, a system developed by R V Pound for frequency-stabilizing a microwave oscillator is discussed, and a change in the microwave circuit is described, which increases the usable frequency range of the stabilizing circuit.
Measurement of Tropospheric Index-of-Refraction Fluctuations and Profiles
C. M. Crain,A. P. Deam,J. R. Gerhardt +2 more
- 01 Feb 1953
TL;DR: In this article, measurements of index-of-refraction fluctuations and profiles made with a direct reading microwave refractometer over the Atlantic Ocean and coastal areas near Lakehurst, N.J., in April 1951 and over the vicinity of Wright-Patterson Field, Dayton, Ohio, in June 1951 were presented.
13