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Start Over Subject Ondřejov Observatory

1. A solar radio telescope for the wavelengths of 56 and 130 cm

Creator:
Budějický, J.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Ondřejov Observatory, radio telescope, and measurement accuracy
Language:
Czech
Description:
In the paper is described the construction of the radio telescope for the wavelengths of 56 and 130 cm which has been used on the observatory of the Astronomical Institute of the ČSAV at Ondřejov for radio observations of the sun. Prevailing part of the work is devoted to the receiving equipment for the wavelength of 56 crn, which whole was built in own laboratories and which has been for 3 years in everyday operation. The author explains the determination of the fundamental parameters of the equipment and describes the means necessary to reach them. The design proposal and the realization of the receiver for the wavelength of 56 cm together with a high-stability d. c. amplifier and the design and realization of the calibrating arrangements including diode noisegenerator are described. Further the author considers to the details the influence of different quantities on the measurement accuracy and on the estimation of the resulting power flux density in the antenna apertuře with this instrument. Finally, a servomechanism performing automatic transformation of equatorial to azimuthal coordinates is described. In the next part the 130 cm - equipment is briefly mentioned. This equipment was of substantial part built outside the Institute. The both receiving apparatus use a common mirror of 7‘5m diameter having in its focus two primary feeds with polarizations perpendicular to each other.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2. Přehled erupcí pozorovaných na Ondřejově během MGR

Creator:
Kvíčala, J., Hřebík, F., Letfus, V., Olmr, J., Švestka, Z., and Křivský, L.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
astronomical observations, solar flares, and Ondřejov Observatory
Language:
Czech
Description:
This Paper is a continuation of four proceeding lists, which contained flares observed at Ondřejov since 1948 up to the end of June, 1957. This list presents data abour 727 flares, associated 536 Mc/s outburst, and atmospheries observed and recorded during the I. G. Y. Curves of the H2 line-width changes for all these flares are plotted in Fig. 1-15.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

3. Spectral observations of solar radio bursts at 2.0 - 4.5 GHz January - December 1990

Creator:
Tlamicha, A., Ambrožová, Z., and Sigmund, T.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Ondřejov Observatory and solar radio bursts
Language:
Czech
Description:
Spectral observations of solar radio bursts at 2.0 - 4.5 GHz taken at the Astronomical Observatory Ondřejov between January and December 1990 are presented. Also given are a tables and computer outputs in equidensities and in time intensity profiles of the bursts.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

4. Spectral observations of solar rado bursts at 2.0 - 4.5 GHz January - August 1991

Creator:
Tlamicha, A., Ambrožová, Z., and Sigmund, T.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Ondřejov Observatory and solar radio bursts
Language:
Czech
Description:
Spectral Observations of solar radio bursts at 2.0 - 4.5 GHz taken at the Astronomical Observatory Ondřejov between January and August 1991 are presented. Also given are a tables and computer outputs in equidensities and in time intensity profiles of the bursts. and - Abstract (s. 1) - zde před článkem - Observed data (s. 9-139)
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public