The Mark IIIA Correlator System

The ROTSE-IIIa Telescope System

We report on the current operating status of the ROTSE-IIIa telescope, currently undergoing testing at Los Alamos National Laboratories in New Mexico. It will be shipped to Siding Spring Observatory, Australia, in first quarter 2002. ROTSE-IIIa has been in automated observing mode since early October, 2001, after completing several weeks of calibration and check-out observations. Calibrated lis...

A wideband analog correlator system for AMiBA

A wideband correlator system with a bandwidth of 16 GHz or more is required for Array for Microwave Background Anisotropy (AMiBA) to achieve the sensitivity of 10μK in one hour of observation. Double-balanced diode mixers were used as multipliers in 4-lag correlator modules. Several wideband modules were developed for IF signal distribution between receivers and correlators. Correlator outputs ...

The PAIVGLOSS MARK I MAT system

The goal of the PANGLOSS projecd is to develop a system which will, from the very beginning, produce highquality translations of unconstrained text. This can only be attained currently by keeping the human in the translation loop, in our case via a software module called the A U O ~ R . The main measure of progress in the development of the Pangloss system will therefore be the gradual decrease...

The FFX Correlator

We established a new algorithm for correlation process in radio astronomy. This scheme consists of the 1st-stage Fourier Transform as a filter and the 2nd-stage Fourier Transform for spectroscopy. The ”FFX” correlator stands for Filter and FX architecture, since the 1st-stage Fourier Transform is performed as a digital filter, and the 2nd-stage Fourier Transform is performed as a conventional F...

The Vector Current Correlator