Radio Astronomy: Instruments and Observations

ISBN-13: 9781468415773 / Angielski / Miękka / 2012 / 184 str.

D. V. Skobel Tsyn

Opis

In this volume are collected scientific research reports written in recent years at the Radio-Astronomy Laboratory in the field of radio-astronomical apparatus and methods of ob- servation. Modern radiometers of high sensitivity, using masers and parametric amplifiers, have been installed at the R T-22 radio telescope of the Laboratory's Radio-Astronomy station. Some of the papers are devoted to a description of these original radiometers and to their operating conditions. Considerable space is given to a description of the meter-wave equipment and to the ad- justment of the DKR-1000 diapason cruciform radio telescope. Two papers describe radio in- terferometers with radio relaying. This method of increasing the resolving power is extreme- ly effective and it is expected that it will be further developed under laboratory conditions, primarily in the meter wave range. Problems of radio-telescope design occupy an important place in contemporary radio astronomy and radio engineering. Three articles are devoted to this important line of work. In 1966, an experiment was carried out at the Radio-Astronomy Laboratory on the inves- tigation of the solar wind by a radio-astronomical method. The experiment gave substantially new data concerning the nonuniformity of the plasma around the sun; the experimental part of the work carried out is described in the collection.

Spis treści

A 5.2-cm Null Radiospectrometer with a Symmetrical Method of Reception.- Possibility of Using the Compensation Method for Spectral Measurements.- An 8-cm Radiometer with a Quantum Paramagnetic Amplifier.- Static Design of a Parabolic Reflector Supported at Many Points.- Rigidity of Cantilever Mounting of Parabolic Mirrors.- Design Elastic Deformations of a 7.5-Meter Parabolic Mirror.- Radially Symmetric Multiple-Support of Parabolic Antennas.- Toward a Theory of the Solar Wind.- A Possible Hydrodynamic Model for a Finite-Radius Region of Frequency Collisions.- Gain Stabilization of Transistorized Selective LF Amplifiers in Radiometric Receivers.- Investigation of Random-Variable Moments of Wind Loading Acting on a Rotating Antenna.- A 3-cm Null Radiospectrometer for Observations of the Galactic Radio Line of Excited Hydrogen.- Discrete Diode Phase Shifter for Very Short Wavelengths.- Radiometers with 1.6- and 3.3-cm Band Parametric Amplifiers for the RT-22 Telescope.- Parametric Amplifier for Radio-Astronomical Investigations at 21 cm.- Determination of the Orientation of the Electric Axis for the East— West Array of the DKR-1000 Cruciform Radio Telescope by Statistical Reduction of Observations of Many Discrete Sources.- Radio Interferometry with Radio-Relay Links.- Basic Parameters of the East—West Antenna Feed of the Lebedev Institute Wideband Cruciform Radio Telescope.- Apparatus and Methods Used in Radio-Astronomical Measurements of the Velocity of the Solar Wind.- Radio-Relay Interferometer for the Meter Waveband.