Lossy Compression of Large-Scale Radio Interferometric Data. (arXiv:2304.07050v1 [astro-ph.IM])

This work proposes to reduce visibility data volume using a
baseline-dependent lossy compression technique that preserves smearing at the
edges of the field-of-view. We exploit the relation of the rank of a matrix and
the fact that a low-rank approximation can describe the raw visibility data as
a sum of basic components where each basic component corresponds to a specific
Fourier component of the sky distribution. As such, the entire visibility data
is represented as a collection of data matrices …

approximation arxiv astro collection components compression data distribution exploit low matrix radio raw reduce scale tensor visibility work