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http://hdl.handle.net/2289/6597| Title: | Ionospheric modelling using GPS to Calibrate the MWA. II: Regional ionospheric modelling using GPS and GLONASS to estimate ionospheric gradients |
| Authors: | Arora, B. S. Morgan, J. Ord, S.M. Dwarakanath, K.S. +15 Co-authors |
| Keywords: | atmospheric effects techniques - interferometric |
| Issue Date: | Jul-2016 |
| Publisher: | Cambridge University Press for Astronomical Society of Australia |
| Citation: | Publications of the Astronomical Society of Australia, 2016, Vol.33, e031 |
| Abstract: | We estimate spatial gradients in the ionosphere using the Global Positioning System and GLONASS (Russian global navigation system) observations, utilising data from multiple Global Positioning System stations in the vicinity of Murchison Radio-astronomy Observatory. In previous work, the ionosphere was characterised using a single-station to model the ionosphere as a single layer of fixed height and this was compared with ionospheric data derived from radio astronomy observations obtained from the Murchison Widefield Array. Having made improvements to our data quality (via cycle slip detection and repair) and incorporating data from the GLONASS system, we now present a multi-station approach. These two developments significantly improve our modelling of the ionosphere. We also explore the effects of a variable-height model. We conclude that modelling the small-scale features in the ionosphere that have been observed with the MWA will require a much denser network of Global Navigation Satellite System stations than is currently available at the Murchison Radio-astronomy Observatory. |
| Description: | Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations) |
| URI: | http://hdl.handle.net/2289/6597 |
| ISSN: | 1323-3580 1448-6083(online) |
| Alternative Location: | http://adsabs.harvard.edu/abs/2016PASA...33...31A http://arxiv.org/abs/1605.02409 http://dx.doi.org/10.1017/pasa.2016.22 |
| Copyright: | 2016 Astronomical Society of Australia |
| Appears in Collections: | Research Papers (A&A) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2016_PubAstSocAust_33_e031.pdf Restricted Access | Restricted Access | 2.64 MB | Adobe PDF | View/Open Request a copy |
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