The Vatly Radio Telescope: Performance Study

Nguyen Thi Phuong, Pham Ngoc Diep, Darriulat Pierre, Pham Tuyet Nhung, Pham Tuan Anh, Pham Ngoc Dong, Do Thi Hoai, Nguyen Thi Thao

Abstract


A detailed account of the performance of the VATLY radio telescope, operated in HaNoi on and near the 21 cm HI line, is given. Drift scans across the Sun are used to measure the dependence of the gain on frequency and power, revealing small nonlinearities at or below the percent level. Interferences associated with the electromagnetic pollution in the Ha Noi environment are described. The sensitivity of the instrument is discussed and demonstrated with the detection of the Crab. The reliability of the measurement of the spectral flux density is illustrated by comparing solar flux data measured in Ha Noi and at the Australian observatory of Learmonth.

Keywords


Radio Telescope, 21 cm HI line, sensitivity

Full Text:

PDF

References


N.V. Hiep et al., The VATLY radio telescope, Comm. Phys.Vietnam, Vol 22, No 4 (2012), 365. N.V. Hiep, Observation of the 21 cm sky using the VATLY radio telescope, Master thesis, presented at Vietnam Institute of Physics, 2012.

N.V. Hiep et al., Mapping atomic hydrogen in the disk of the Milky Way, Comm. Phys. Vietnam, Vol 23, No 2 (2013), 107-119.

N.V. Hiep et al., Radio Observation of Solar-Activity-Related mHz Oscillations, Sol. Phys. 289, 3 (2014), 939-950.

N.T. Phuong et al., Multipath generated correlations between apparent solar oscil-

lations observed by two distant radio telescopes, submitted for publication in Sol. Phys (2014).

P.N. Diep et al., Correlated multipath eects between distant radio telescopes, submitted for publication in Publications of the Astronomical Society of Australia (2014).

A. Rogers, http://www.haystack.mit.edu/edu/undergrad/srt/oldsrt.html.

H. Weaver and D.R.W. Williams, The Berkeley Low Latitude Survey of Neutral Hydrogen, Astron. & Astrophys. Suppl., 17 (1974) 1-249.




DOI: https://doi.org/10.15625/0868-3166/24/3/3981 Display counter: Abstract : 160 views. PDF : 24 views.

Refbacks

  • There are currently no refbacks.




Editorial Office:

Communications in Physics

1st Floor, A16 Building, 18B Hoang Quoc Viet Street, Cau Giay District, Hanoi, Vietnam

Tel: (+84) 024 3791 7102 

Email: cip@vjs.ac.vn

Copyright by