Ionospheric Modelling using GPS to Calibrate the MWA. I: Comparison of First Order Ionospheric Effects between GPS Models and MWA Observations

Copyright © Astronomical Society of Australia 2015 We compare first-order (refractive) ionospheric effects seen by the MWA with the ionosphere as inferred from GPS data. The first-order ionosphere manifests itself as a bulk position shift of the observed sources across an MWA field of view. These ef...

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Main Authors:	Arora, B., Morgan, John, Ord, S., Tingay, Steven, Hurley-Walker, Natasha, Bell, M., Bernardi, G., Bhat, Ramesh, Briggs, F., Callingham, J., Deshpande, A., Dwarakanath, K., Ewall-Wice, A., Feng, L., For, B., Hancock, Paul, Hazelton, B., Hindson, L., Jacobs, D., Johnston-Hollitt, M., Kapinska, A., Kudryavtseva, N., Lenc, E., McKinley, B., Mitchell, D., Oberoi, D., Offringa, A., Pindor, B., Procopio, P., Riding, J., Staveley-Smith, L., Wayth, Randall, Wu, C., Zheng, Q., Bowman, J., Cappallo, R., Corey, B., Emrich, David, Goeke, R., Greenhill, L., Kaplan, D., Kasper, J., Kratzenberg, E., Lonsdale, C., Lynch, Mervyn, McWhirter, S., Morales, M., Morgan, E., Prabu, T., Rogers, A., Roshi, A., Shankar, N., Srivani, K., Subrahmanyan, R., Waterson, M., Webster, R., Whitney, A., Williams, A.
Format:	Journal Article
Published:	Cambridge University Press 2015
Online Access:	http://hdl.handle.net/20.500.11937/11608

id	curtin-20.500.11937-11608
recordtype	eprints
spelling	curtin-20.500.11937-116082017-09-13T14:58:13Z Ionospheric Modelling using GPS to Calibrate the MWA. I: Comparison of First Order Ionospheric Effects between GPS Models and MWA Observations Arora, B. Morgan, John Ord, S. Tingay, Steven Hurley-Walker, Natasha Bell, M. Bernardi, G. Bhat, Ramesh Briggs, F. Callingham, J. Deshpande, A. Dwarakanath, K. Ewall-Wice, A. Feng, L. For, B. Hancock, Paul Hazelton, B. Hindson, L. Jacobs, D. Johnston-Hollitt, M. Kapinska, A. Kudryavtseva, N. Lenc, E. McKinley, B. Mitchell, D. Oberoi, D. Offringa, A. Pindor, B. Procopio, P. Riding, J. Staveley-Smith, L. Wayth, Randall Wu, C. Zheng, Q. Bowman, J. Cappallo, R. Corey, B. Emrich, David Goeke, R. Greenhill, L. Kaplan, D. Kasper, J. Kratzenberg, E. Lonsdale, C. Lynch, Mervyn McWhirter, S. Morales, M. Morgan, E. Prabu, T. Rogers, A. Roshi, A. Shankar, N. Srivani, K. Subrahmanyan, R. Waterson, M. Webster, R. Whitney, A. Williams, A. Williams, A. Copyright © Astronomical Society of Australia 2015 We compare first-order (refractive) ionospheric effects seen by the MWA with the ionosphere as inferred from GPS data. The first-order ionosphere manifests itself as a bulk position shift of the observed sources across an MWA field of view. These effects can be computed from global ionosphere maps provided by GPS analysis centres, namely the CODE. However, for precision radio astronomy applications, data from local GPS networks needs to be incorporated into ionospheric modelling. For GPS observations, the ionospheric parameters are biased by GPS receiver instrument delays, among other effects, also known as receiver DCBs. The receiver DCBs need to be estimated for any non-CODE GPS station used for ionosphere modelling. In this work, single GPS station-based ionospheric modelling is performed at a time resolution of 10 min. Also the receiver DCBs are estimated for selected Geoscience Australia GPS receivers, located at Murchison Radio Observatory, Yarragadee, Mount Magnet and Wiluna. The ionospheric gradients estimated from GPS are compared with that inferred from MWA. The ionospheric gradients at all the GPS stations show a correlation with the gradients observed with the MWA. The ionosphere estimates obtained using GPS measurements show promise in terms of providing calibration information for the MWA. 2015 Journal Article http://hdl.handle.net/20.500.11937/11608 10.1017/pasa.2015.29 Cambridge University Press fulltext
repository_type	Digital Repository
institution_category	Local University
institution	Curtin University Malaysia
building	Curtin Institutional Repository
collection	Online Access
description	Copyright © Astronomical Society of Australia 2015 We compare first-order (refractive) ionospheric effects seen by the MWA with the ionosphere as inferred from GPS data. The first-order ionosphere manifests itself as a bulk position shift of the observed sources across an MWA field of view. These effects can be computed from global ionosphere maps provided by GPS analysis centres, namely the CODE. However, for precision radio astronomy applications, data from local GPS networks needs to be incorporated into ionospheric modelling. For GPS observations, the ionospheric parameters are biased by GPS receiver instrument delays, among other effects, also known as receiver DCBs. The receiver DCBs need to be estimated for any non-CODE GPS station used for ionosphere modelling. In this work, single GPS station-based ionospheric modelling is performed at a time resolution of 10 min. Also the receiver DCBs are estimated for selected Geoscience Australia GPS receivers, located at Murchison Radio Observatory, Yarragadee, Mount Magnet and Wiluna. The ionospheric gradients estimated from GPS are compared with that inferred from MWA. The ionospheric gradients at all the GPS stations show a correlation with the gradients observed with the MWA. The ionosphere estimates obtained using GPS measurements show promise in terms of providing calibration information for the MWA.
format	Journal Article
author	Arora, B. Morgan, John Ord, S. Tingay, Steven Hurley-Walker, Natasha Bell, M. Bernardi, G. Bhat, Ramesh Briggs, F. Callingham, J. Deshpande, A. Dwarakanath, K. Ewall-Wice, A. Feng, L. For, B. Hancock, Paul Hazelton, B. Hindson, L. Jacobs, D. Johnston-Hollitt, M. Kapinska, A. Kudryavtseva, N. Lenc, E. McKinley, B. Mitchell, D. Oberoi, D. Offringa, A. Pindor, B. Procopio, P. Riding, J. Staveley-Smith, L. Wayth, Randall Wu, C. Zheng, Q. Bowman, J. Cappallo, R. Corey, B. Emrich, David Goeke, R. Greenhill, L. Kaplan, D. Kasper, J. Kratzenberg, E. Lonsdale, C. Lynch, Mervyn McWhirter, S. Morales, M. Morgan, E. Prabu, T. Rogers, A. Roshi, A. Shankar, N. Srivani, K. Subrahmanyan, R. Waterson, M. Webster, R. Whitney, A. Williams, A. Williams, A.
spellingShingle	Arora, B. Morgan, John Ord, S. Tingay, Steven Hurley-Walker, Natasha Bell, M. Bernardi, G. Bhat, Ramesh Briggs, F. Callingham, J. Deshpande, A. Dwarakanath, K. Ewall-Wice, A. Feng, L. For, B. Hancock, Paul Hazelton, B. Hindson, L. Jacobs, D. Johnston-Hollitt, M. Kapinska, A. Kudryavtseva, N. Lenc, E. McKinley, B. Mitchell, D. Oberoi, D. Offringa, A. Pindor, B. Procopio, P. Riding, J. Staveley-Smith, L. Wayth, Randall Wu, C. Zheng, Q. Bowman, J. Cappallo, R. Corey, B. Emrich, David Goeke, R. Greenhill, L. Kaplan, D. Kasper, J. Kratzenberg, E. Lonsdale, C. Lynch, Mervyn McWhirter, S. Morales, M. Morgan, E. Prabu, T. Rogers, A. Roshi, A. Shankar, N. Srivani, K. Subrahmanyan, R. Waterson, M. Webster, R. Whitney, A. Williams, A. Williams, A. Ionospheric Modelling using GPS to Calibrate the MWA. I: Comparison of First Order Ionospheric Effects between GPS Models and MWA Observations
author_facet	Arora, B. Morgan, John Ord, S. Tingay, Steven Hurley-Walker, Natasha Bell, M. Bernardi, G. Bhat, Ramesh Briggs, F. Callingham, J. Deshpande, A. Dwarakanath, K. Ewall-Wice, A. Feng, L. For, B. Hancock, Paul Hazelton, B. Hindson, L. Jacobs, D. Johnston-Hollitt, M. Kapinska, A. Kudryavtseva, N. Lenc, E. McKinley, B. Mitchell, D. Oberoi, D. Offringa, A. Pindor, B. Procopio, P. Riding, J. Staveley-Smith, L. Wayth, Randall Wu, C. Zheng, Q. Bowman, J. Cappallo, R. Corey, B. Emrich, David Goeke, R. Greenhill, L. Kaplan, D. Kasper, J. Kratzenberg, E. Lonsdale, C. Lynch, Mervyn McWhirter, S. Morales, M. Morgan, E. Prabu, T. Rogers, A. Roshi, A. Shankar, N. Srivani, K. Subrahmanyan, R. Waterson, M. Webster, R. Whitney, A. Williams, A. Williams, A.
author_sort	Arora, B.
title	Ionospheric Modelling using GPS to Calibrate the MWA. I: Comparison of First Order Ionospheric Effects between GPS Models and MWA Observations
title_short	Ionospheric Modelling using GPS to Calibrate the MWA. I: Comparison of First Order Ionospheric Effects between GPS Models and MWA Observations
title_full	Ionospheric Modelling using GPS to Calibrate the MWA. I: Comparison of First Order Ionospheric Effects between GPS Models and MWA Observations
title_fullStr	Ionospheric Modelling using GPS to Calibrate the MWA. I: Comparison of First Order Ionospheric Effects between GPS Models and MWA Observations
title_full_unstemmed	Ionospheric Modelling using GPS to Calibrate the MWA. I: Comparison of First Order Ionospheric Effects between GPS Models and MWA Observations
title_sort	ionospheric modelling using gps to calibrate the mwa. i: comparison of first order ionospheric effects between gps models and mwa observations
publisher	Cambridge University Press
publishDate	2015
url	http://hdl.handle.net/20.500.11937/11608
first_indexed	2018-09-06T18:53:29Z
last_indexed	2018-09-06T18:53:29Z
_version_	1610885375419482112

Ionospheric Modelling using GPS to Calibrate the MWA. I: Comparison of First Order Ionospheric Effects between GPS Models and MWA Observations

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