Results 101 to 110 of about 1,264 (121)

The Nancay multifrequency radioheliograph: New observations

Advances in Space Research, 1988
Abstract The Nancay radioheliograph provides images of the sun on a north-south baseline at up to five frequencies between 150 and 450 MHz with time resolution up to 0.1 s. East-west images are also obtained at 164 MHz with a time resolution up to 0.02 s. This paper briefly presents the performances of the instrument and the observing modes.
C. Mercier, K.-L. Klein, G. Trottet
openaire   +1 more source

The nançay radioheliograph

2008
The Nancay Radioheliograph has been upgraded in order to provide high time resolution 2D images of the soler corona. This is due to its new digital correlator (Stokes I and V, 576 channels). Calibration has also been improved. The multifrequency operation remains almost unchanged. It allows simultaneous observations of up to 10 frequencies in the range
Alain Kerdraon, Jean-Marc Delouis
openaire   +1 more source

A proposed millimeter radioheliograph

Proceedings of the IEEE, 1973
A radio telescope capable of two-dimensional mapping of the sun at a millimeter wavelength with resolution of a few seconds of arc would add greatly to our knowledge of the sun and solar flares. A design which promises to make such an instrument possible is being studied at present.
openaire   +1 more source

EMC study in chinese spectral radioheliograph

2015 1st URSI Atlantic Radio Science Conference (URSI AT-RASC), 2015
There are always the Electromagnetic compatibility (EMC) problems where the electromagnetic phenomenon exists. EMC is an inescapable problem in radio astronomy and also common problem for radio astronomical telescopes.
null Lihong Geng, null Zhijun Chen, null Yihua Yan, null Qinghui Song   +3 more
openaire   +1 more source

The mark II Nan�ay radioheliograph

Solar Physics, 1977
We describe the new Nancay Radioheliograph (version II) which is a multicorrelator system. The main characteristics of this instrument are high space and time resolutions and flexible on-line data processing. At present it produces one-dimensional images at 169 MHz. This instrument is mainly intended for solar observations.
J. Bonmartin, I. Jones, A. Kerdraon, A. Lacombe, M. F. Lantos, P. Lantos, C. Mercier, M. Pick, G. Trottet, M. Bruley, C. Chantelat, M. Chapuis, Y. Chapuis, B. Clavelier, C. Couteret, J. P. Drouhin, P. Gueniau, R. Tocqueville   +17 more
openaire   +1 more source

EMC Study in Mingantu Spectral Radioheliograph

2018 2nd URSI Atlantic Radio Science Meeting (AT-RASC), 2018
There are always the Electromagnetic compatibility (EMC) problems where the electromagnetic phenomenon exists. EMC is an inescapable problem in radio astronomy and also common problem for radio astronomical telescopes.
Geng Lihong, Chen Zhijun, Yan Yihua, Liu Donghao, Li Sha, Su Cang   +5 more
openaire   +1 more source

The Polarization Performance of MingantU SpEctral Radioheliograph

2018 2nd URSI Atlantic Radio Science Meeting (AT-RASC), 2018
The MUSER(MingantU SpEctral Radioheliograph) is a new radio interferometric array for solar delicated, which will be used to image the Sun with high spatial resolution, high time resolution and high frequency resolution. The antenna works with ultra-wide band dual-circular polarized feed to obtain high quality dual circular polarized image of the Sun ...
Cang Su, Wei Wang, Yihua Yan
openaire   +1 more source

Three-frequency Radioheliograph Observations of Solar Continuum Events

Publications of the Astronomical Society of Australia, 1975
To date the Culgoora radioheliograph has recorded seven continuum bursts simultaneously at its three operating frequencies of 160, 80 and 43 MHz. In every case the radio emission is found to originate from stationary sources whose heights increase with decreasing frequency. The implications of these new observations are discussed below.
A. Magun, R.T. Stewart, R.D. Robinson
openaire   +1 more source

The Improved λ 8-cm Radioheliograph at Toyokawa

Publications of the Astronomical Society of Japan, 1984
Abstract The sensitivity and the phase stability of the λ 8-cm radioheliograph have been improved by replacing the waveguide network of the original system with low-noise and phase-stable front-end receivers and low-loss and phase-stable coaxial cables. Receiver noise temperatures of antennas are mostly around 800 K with a few exceptions
Masanori Nishio, Chikayoshi Torii, Shinzo Enome, Kiyoto Shibasaki, Yoshio Tsukiji, Shoji Kobayashi, Naohiko Yoshimi, Shigetoshi Takata, Toshio Takayanagi, Masato Ishiguro   +9 more
openaire   +1 more source

Polarization simulation for Mingantu Ultrawide SpEctral Radioheliograph

2016 URSI Asia-Pacific Radio Science Conference (URSI AP-RASC), 2016
The MUSER(Mingantu Ultrawide SpEctral Radioheliograph) is a new generation of solar dedicated radio telescope of which the instruments construction has been finished. Its objective is to obtain high quality solar images include dual circular (L, R) polarized signals in wide band.
Cang Su, Wei Wang, Yihua Yan
openaire   +1 more source