Abstract
In the context of next-generation radio interferometers, we
are facing a big challenge of how to economically process data. The
classical averaging method to reduce the data is not optimal and can
even produce false negative errors in some cases, such as fast radio
transients (FRT) imaging, where temporal resolution is required. We
propose a robust dimensionality reduction method for FRT imaging in
the framework of compressed sensing-based imaging algorithms. For each
time slice of FRT imaging, our dimensionality reduction defines a linear
embedding operator to reduce the space spanned by the left singular
vectors of the measurement operator, which can be considered as a fast
approximation of singular value decomposition (SVD). The preliminary
results on simulated FRT showcase that the proposed dimensionality
reduction can simultaneously reduce the data significantly and recover
FRT correctly, while the averaging technique causes the FRT dilution
problem.
are facing a big challenge of how to economically process data. The
classical averaging method to reduce the data is not optimal and can
even produce false negative errors in some cases, such as fast radio
transients (FRT) imaging, where temporal resolution is required. We
propose a robust dimensionality reduction method for FRT imaging in
the framework of compressed sensing-based imaging algorithms. For each
time slice of FRT imaging, our dimensionality reduction defines a linear
embedding operator to reduce the space spanned by the left singular
vectors of the measurement operator, which can be considered as a fast
approximation of singular value decomposition (SVD). The preliminary
results on simulated FRT showcase that the proposed dimensionality
reduction can simultaneously reduce the data significantly and recover
FRT correctly, while the averaging technique causes the FRT dilution
problem.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the International BASP Frontiers Workshop 2019 |
| Publisher | BASP |
| Pages | 26-26 |
| Number of pages | 1 |
| Publication status | Published - 2019 |
| Event | International BASP Frontiers workshop 2019 - Villars sur Ollon, Switzerland Duration: 3 Feb 2019 → 8 Feb 2019 http://www.baspfrontiers.org |
Workshop
| Workshop | International BASP Frontiers workshop 2019 |
|---|---|
| Country/Territory | Switzerland |
| City | Villars sur Ollon |
| Period | 3/02/19 → 8/02/19 |
| Internet address |