Measurement of Atmospheric Opacity in K-band of Nanshan 25 m Radio Telescope

AbstractSince the first light of the 2.4-m Thai National Telescope in 2013, Thailand foresees another great leap forward in astronomy. A project known as “Radio Astronomy Network and Geodesy for Development” (RANGD) by National Astronomical Research Institute of Thailand (NARIT) has been approved for year 2017-2021. A 40-m radio telescope has been planned to operate up to 115-GHz observation with prime-focus capability for low frequency and phased array feed receivers. The telescope’s first light is expected in late 2019 with a cryogenics K-band and L-band receivers. RFI environment at the site has been investigated and shown to be at reasonable level. A 13-m VGOS telescope is also included for geodetic applications. Early single-dish science will focus on time domain observations, such as pulsars and transients, outbursts and variability of maser and AGN sources.

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First Results Using a K-Band Maser Receiver on the Parkes 64-m Radio Telescope

Publications of the Astronomical Society of Australia ◽

10.1017/s1323358000021421 ◽

1982 ◽

Vol 4 (4) ◽

pp. 451-453

Author(s):

R. A. Batchelor ◽

J. L. Caswell ◽

J. R. Forster ◽

K. J. Wellington

Keyword(s):

Flux Density ◽

Radio Telescope ◽

Total System ◽

Astronomical Observations ◽

Antenna Temperature ◽

First Results ◽

System Temperature ◽

24 Ghz ◽

Csiro Division ◽

K Band

A new maser receiver, operating between 20 and 24 GHz and constructed by the radiometer group at the CSIRO Division of Radiophysics, was first scheduled for astronomical observations in December 1981. In good observing conditions the system temperature was as low as 60 K. In conjunction with the versatility of the 1024-channel correlator and the large collecting area of the Parkes telescope (the central 37 m illuminated at 22 GHz yields a ratio of flux density to antenna temperature of 9∼ Jy K-1) the total system is a very powerful new tool. Here we report some observations of naturally occuring celestial H2O masers which we have studied with this system.

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Calibration of K-band Cryogenic Receiver for Nanshan 26m Radio Telescope

2019 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC) ◽

10.1109/csqrwc.2019.8799351 ◽

2019 ◽

Author(s):

Kai Wang ◽

Hao Yan ◽

Maozheng Chen ◽

Jun Ma ◽

Xiaofei Li ◽

...

Keyword(s):

Radio Telescope ◽

K Band

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Interpretation of the Filament Depression at Millimetric and Centimetric Wavelengths

International Astronomical Union Colloquium ◽

10.1017/s0252921100065349 ◽

1979 ◽

Vol 44 ◽

pp. 131-134

Author(s):

A. Raoult ◽

P. Lantos ◽

E. Fürst

Keyword(s):

Radio Telescope ◽

Active Regions ◽

Simple Shape ◽

Quiet Sun ◽

Unstable Process

The depressions at centimetric and millimetric wavelengths associated with the filaments are studied using already published maps as well as unpublished observations from the Effelsberg 100 m radio telescope of the M.P.I., Bonn. The study has been restricted to large Ha quiescent prominences of relatively simple shape, situated far from the limb and from active regions. The data has been reduced employing one method whose main characteristics are choice of a local quiet sun definition and avoidance of the unstable process of deconvolution.

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