ExCon: Making billion pixel radio interferometric images

Imaging a wide field of view with high enough resolution is needed for calibration and achieving a high dynamic range, especially with low frequency interferometers. This paper describes a new imager (ExCon) that is able to make widefield images that are far larger in size compared to images made by existing imaging software. In the process of implementing this new imager, we have also introduced new algorithms in image weighting and convolution kernel calculation. We also give details about these algorithms. Deconvolution algorithms will be implemented as future work.