ALMA Chapter 3.1: Calibration issues for ALMA
نویسنده
چکیده
The precision imaging to be attained by the ALMA will be achieved through accurate calibration. The types of calibration are summarized in Table 3.1. Table 3.1 ALMA Calibration Requirements. Pointing 0.6" absolute Primary Beam 2-3% Baseline Determination 0.1 mm Flux Calibration 1% absolute flux accuracy goal Phase Calibration 0.15 radian at 230 GHz Bandpass Calibration 10000:1 to 100000:1 Polarization Calibration 10000:1 Single Antenna Calibration Employed
منابع مشابه
Calibration Issues for the ALMA
The precision imaging to be attained by the ALMA will be achieved through accurate calibration. The types of calibration are summarized in Table 3.1. Calibration strategies will be developed and implemented on the NRAO 12m telescope, and the OVRO and BIMA arrays. The principal goals to be achieved by the end of the ALMA Design and Development (D&D) Phase are to demonstrate radiometric phase cor...
متن کاملSome biological parameters of Silver Crucian carp, Carassius auratus, in the international wetlands of Alma-Gol and Ala-Gol (Golestan Province, Iran)
In the present study, age, growth and reproduction of Carassius auratus were investigated in the Alma-Gol and Ala-Gol (northern Iran) from September 2000 to August 2002. Among the total of 1450 specimens, the estimated ages ranged from 0+ to 8+ years. C. auratus showed an allometric growth, negatively in Alma-Gol and positively in Ala-Gol. The von Bertalanffy growth curves were fitted to mean t...
متن کاملSome biological parameters of Silver Crucian carp, Carassius auratus, in the international wetlands of Alma-Gol and Ala-Gol (Golestan Province, Iran)
In the present study, age, growth and reproduction of Carassius auratus were investigated in the Alma-Gol and Ala-Gol (northern Iran) from September 2000 to August 2002. Among the total of 1450 specimens, the estimated ages ranged from 0+ to 8+ years. C. auratus showed an allometric growth, negatively in Alma-Gol and positively in Ala-Gol. The von Bertalanffy growth curves were fitted to mean t...
متن کاملALMA Project Book Chapter 3.2, Calibration: Hardware Schemes
In this section, hardware solutions to the problem of calibrating the ALMA amplitude and phase are described. Both solutions use the blocked area in the center of the subreflector as the source of radiation from either a two-temperature load or a coherent signal source. A simple mirror mechanism is used to select between the two systems. The coherent source may be made phase stable through a ro...
متن کاملALgorithms for the Modelling of Acoustic interactions
1 Introduction This report describes the final results of integrating virtual reality graphics, sound, and user interface technology with ALMA sound synthesis into a virtual instrument. In effect, the report summarizes months 9-33 of ALMA activities at the Telecommunications Software and The parameters of physical sound models can be altered while playing, which creates the need for controllers...
متن کامل