KOKUNUN TÜKETİCİ SATIN ALMA DAVRANIŞI ÜZERİNDEKİ ETKİSİ

ALMA Chapter 3.1: Calibration issues for 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. 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 Polar...

ALMA Memo XXX Bandpass Calibration for ALMA

This memo contains a detailed evaluation of the expected performance of the bandpass calibration for ALMA. We evaluate the limitations on the bandpass accuracy due to the imperfect knowledge of the atmospheric transmission. We show that the best bandpass accuracy is obtained when the amplitude calibration is applied in a single-load scheme. The proposed scheme is a variant of the so-called band...

1 Satellite - Umts Ip - Based Network ( Satin )

The EU-IST IP based satellite project, SATIN is presented in this paper. Role of satellite in 3G mobile communications systems is discussed based on success and failure of the first (1G) and second (2G) generation satellite systems. The significant of the SATIN project in terms of present and future market and technology trend is stressed. Objectives and the technical approaches of the project ...

ALMA Memo 493 Finding Fast Switching Calibrators for ALMA

In order to perform fast switching phase calibration effectively, we need to have a database of bright point-like sources at millimeter wavelengths. Optimally, this would include flux measurements at 86 GHz and spectral information at higher frequencies. We present a sample of 31145 compact flat spectrum radio sources with −40 < δ < +60, presumed extragalactic, which will be likely candidates f...

ALMA Memo No. 324 Proposal for ALMA Front End Optics