Abstract
The work is dedicated to calculation of daily variability of monthly averaged full vertical at-mospheric absorption for six well-known moun- tain locations of sub-millimeter wave band ra-diotelescopes obtained with usage of chosen by authors models combination. Test locations we- re defined as follows: Chajnantor plateau in the Atacama mountain desert (Chile), Hanle (India), South Pole (Antarctic), Mauna Kea (Hawaii, USA), Sierra Negra (Puebla, Mexico) and El Leoncito (Argentine). The data of these calculations were compared with the data of long term radiometric observations of other authors. Se- arching for new alternative places to complement existing sub-millimeter telescopes locations was attempted too.
Highlights
Earth atmosphere causes considerable impediments for radioastronomical observations at millimeter and submillimeter waves bands due to atmosphere attenuation and instability its transfer function
Even a slight improvement of the transfer function and its stability can lead to a tangible radioastronomical observations efficiency increase, especially in the submillimeter wave range
As we have shown recently in [7,8,9] utilization of the chosen combination of Liebe’s atmosphere attenuation model and the latest meteorological atmosphere standard [10,11,12] allows us to acquire a good harmony of analytical calculations and experimental data concerning the monthly attenuation average in the atmosphere above the plain-type landscape
Summary
Earth atmosphere causes considerable impediments for radioastronomical observations at millimeter and submillimeter waves bands due to atmosphere attenuation and instability its transfer function. Even a slight improvement of the transfer function and its stability can lead to a tangible radioastronomical observations efficiency increase, especially in the submillimeter wave range. In view of this and taking uniqueness and high cost of the radiotelescopes that are installed in various regions of the world, location astroclimatic suitability assessment is required. These assessments are usually experimental and consist of gathering the statistical information concerning the extent of atmospheric attenuation, it’s seasonal and daily unsteadiness to reveal the most favorable time and place for the observation to be performed [1,2,3,4,5]. The most significant disadvantages of this approach are the fact that only a limited set of frequencies is used for the experiment (usually 1 or 2 frequencies) [1,2,3,4], the necessity of continuous observations cycles that last several years, financial, hardware and organizational efforts and expenses of this important, but yet auxiliary support for radioastronomic observation
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