2021
DOI: 10.1117/1.jatis.8.1.011012
|View full text |Cite
|
Sign up to set email alerts
|

Subkilometer scale ionospheric studies at the SKA-Low site, using MWA extended baselines

Abstract: The ambitious scientific goals of the square kilometre array (SKA) require a matching capability for calibration of instrumental and atmospheric propagation contributions as functions of time, frequency, and position. The development of calibration algorithms to meet these requirements is an active field of research. We aim to characterize these, focusing on the spatial and temporal structure scales of the ionospheric effects; ultimately, these provide the guidelines for designing the optimum calibration strat… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1

Citation Types

0
4
0

Year Published

2022
2022
2024
2024

Publication Types

Select...
2
1

Relationship

1
2

Authors

Journals

citations
Cited by 3 publications
(4 citation statements)
references
References 17 publications
(29 reference statements)
0
4
0
Order By: Relevance
“…For maximum precision one requires simultaneous observations of (nearby) calibrators uniformly distributed surrounding the target. Nominally, following from empirical ionospheric spatial structure studies with MWA [11], the expectations of residual errors with MultiView would be about 1 mTECU. See Figure 1 for an example of the ionospheric phase screens as observed with the MWA.…”
Section: Cm/m-vlbi Microarcsecond Astrometry Using Multiview Methodsmentioning
confidence: 99%
“…For maximum precision one requires simultaneous observations of (nearby) calibrators uniformly distributed surrounding the target. Nominally, following from empirical ionospheric spatial structure studies with MWA [11], the expectations of residual errors with MultiView would be about 1 mTECU. See Figure 1 for an example of the ionospheric phase screens as observed with the MWA.…”
Section: Cm/m-vlbi Microarcsecond Astrometry Using Multiview Methodsmentioning
confidence: 99%
“…If the distance to the irregularities is known (which can be determined by parallax: Loi et al 2015c) then these 2D fields of ionospheric gradients allow the structure function of the ionosphere to be determined from the separation of the closest detected sources (a few km) up to the field of view (∼100 km). Ionospheric scintillation provides a measurement on the smallest scale, with the approach of Rioja & Dodson (2022) potentially providing information on intermediate scales.…”
Section: Future Workmentioning
confidence: 99%
“…Weak scintillation measurements are sensitive to structures close to the Fresnel Scale (defined in Equation (7)), around 300 m at MWA frequencies and typical ionospheric heights, thus allowing us to probe spatial scales an order of magnitude smaller than those probed by refractive shifts, and even smaller than the scales probed by Rioja & Dodson (2022).…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation