Mitaka Correlator for the Space VLBI

The S2 VLBI Correlator: A Correlator for Space VLBI and Geodetic Signal Processing

A unique lag-based VLBI correlator system has been developed for the purpose of supporting both S2-based Space VLBI observations in the Japanese-led VSOP mission and the Canadian Geodetic VLBI program. The system architecture has been designed so that replication of a small number of modules can be used to construct systems with a wide range of sizes. Optimized for a large correlator, the desig...

Distributed Correlator for Space Applications

Earthbound radio telescopes use for the processing of the received signals a central correlator system. However, for interferometry in space using free flying units, where downlink bandwidth, the power dissipation and space per satellite is limited, a distributed correlator can be more advantageous. This distribution reduces the risk of failures as well. In this paper the proposed architecture ...

An Architecture for Integrating VLBI Digital Processing into the Next Generation IRAM PdBI Correlator

Space VLBI at Low Frequencies

At sufficiently low frequencies, no ground-based radio array will be able to produce high resolution images while looking through the ionosphere. A space-based array will be needed to explore the objects and processes which dominate the sky at the lowest radio frequencies. An imaging radio interferometer based on a large number of small, inexpensive satellites would be able to track solar radio...

Space - VLBI phase - reference mapping and astrometry

We present 5 GHz space-VLBI observations of the quasar pair B 1342+662 / B 1342+663 that demonstrate the feasibility of phase-reference techniques using an antenna in space. The space-based data were taken by the satellite HALCA, of the space-VLBI mission VSOP. From residual (referenced) phases we derive an upper bound of 10 meters to the uncertainty of the spacecraft orbit reconstruction. An a...