Abstract Details
| Name: Sachin Shankar Sherkar Affiliation: NCRA Conference ID: ASI2015_556 Title : Statistical testing of the long term stability of the new GMRT Wideband Backend Authors and Co-Authors : Nilesh Sadashiv Raskar, National Centre for Radio Astrophysics (TIFR) Dharam Vir Lal, National Centre for Radio Astrophysics (TIFR) Abstract Type : Poster Abstract Category : Instrumentation and Techniques Abstract : The GMRT is the world's most sensitive radio interferometer and is currently undergoing a very significant upgrade. One of the key objectives of this upgrade is to improve the sensitivity of observations by increasing the bandwidth of observations from the present 30 MHz to a target of 400 MHz. A new GMRT Wideband Backend (GWB) is being implemented to achieve this. In its present state of prototyping, the GWB accepts 8 inputs and can provide a bandwidth of 200 MHz. It supports the following three modes of observation: (a) 8 antenna, single polarisation Stokes I products (b) 4 antenna, dual polarisation, Stokes I products, and (c) 4 antenna, dual polarisation, full Stokes products. The end-to-end wideband signal chain is now available on 12 of the 30 GMRT antennas. The GWB has been in use since February 2014, and here we present a statistical, long term stability analysis of the new wideband systems spanning this period using the existing GMRT Software Backend (GSB) as a benchmark. |