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1. The Murchison Widefield Array Correlator

Author

Ord, S. M., Crosse, B., Emrich, D., Pallot, D., Wayth, R. B., Clark, M. A., Tremblay, S. E., Arcus, W., Barnes, D., Bell, M., Bernardi, G., Bhat, N. D. R., Bowman, J. D., Briggs, F., Bunton, J. D., Cappallo, R. J., Corey, B. E., Deshpande, A. A., deSouza, L., Ewell-Wice, A., Feng, L., Goeke, R., Greenhill, L. J., Hazelton, B. J., Herne, D., Hewitt, J. N., Hindson, L., Hurley-Walker, H., Jacobs, D., Johnston-Hollitt, M., Kaplan, D. L., Kasper, J. C., Kincaid, B. B., Koenig, R., Kratzenberg, E., Kudryavtseva, N., Lenc, E., Lonsdale, C. J., Lynch, M. J., McKinley, B., McWhirter, S. R., Mitchell, D. A., Morales, M. F., Morgan, E., Oberoi, D., Offringa, A., Pathikulangara, J., Pindor, B., Prabu, T., Procopio, P., Remillard, R. A., Riding, J., Rogers, A. E. E., Roshi, A., Salah, J. E., Sault, R. J., Shankar, N. Udaya, Srivani, K. S., Stevens, J., Subrahmanyan, R., Tingay, S. J., Waterson, M., Webster, R. L., Whitney, A. R., Williams, A., Williams, C. L., and Wyithe, J. S. B.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Computer Science - Computational Engineering, Finance, and Science
Abstract

The Murchison Widefield Array (MWA) is a Square Kilometre Array (SKA) Precursor. The telescope is located at the Murchison Radio--astronomy Observatory (MRO) in Western Australia (WA). The MWA consists of 4096 dipoles arranged into 128 dual polarisation aperture arrays forming a connected element interferometer that cross-correlates signals from all 256 inputs. A hybrid approach to the correlation task is employed, with some processing stages being performed by bespoke hardware, based on Field Programmable Gate Arrays (FPGAs), and others by Graphics Processing Units (GPUs) housed in general purpose rack mounted servers. The correlation capability required is approximately 8 TFLOPS (Tera FLoating point Operations Per Second). The MWA has commenced operations and the correlator is generating 8.3 TB/day of correlation products, that are subsequently transferred 700 km from the MRO to Perth (WA) in real-time for storage and offline processing. In this paper we outline the correlator design, signal path, and processing elements and present the data format for the internal and external interfaces., Comment: 17 pages, 9 figures. Accepted for publication in PASA. Some figures altered to meet astro-ph submission requirements

Published
2015
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2. The Murchison Widefield Array Correlator.

Author

Stephen M. Ord, Brian Crosse, David Emrich, Dave Pallot, Randall B. Wayth, Michael A. Clark, Steven E. Tremblay, Wayne Arcus, David Barnes, Martin E. Bell, Gianni Bernardi, N. D. Ramesh Bhat, Julie D. Bowman, Frank H. Briggs, John D. Bunton, Roger J. Cappallo, Brian E. Corey, Avinash A. Deshpande, Ludi deSouza, Aaron Ewell-Wice, Lu Feng, Robert F. Goeke, Lincoln J. Greenhill, Bryna J. Hazelton, David Edwin Herne, Jacqueline N. Hewitt, Luke Hindson, Natasha Hurley-Walker, Daniel C. Jacobs, Melanie Johnston-Hollitt, David L. Kaplan, Justin C. Kasper, Barton B. Kincaid, Ronald Koenig, Eric Kratzenberg, Nadia Kudryavtseva, E. Lenc, Colin J. Lonsdale, Mervyn J. Lynch, Benjamin McKinley, Stephen R. McWhirter, Daniel A. Mitchell, Miguel F. Morales, Edward H. Morgan, Divya Oberoi, André R. Offringa, Joseph Pathikulangara, Bart Pindor, Thiagaraj Prabu, Pietro Procopio, Ronald A. Remillard, J. Riding, Alan E. E. Rogers, Anish A. Roshi, Joseph E. Salah, Robert J. Sault, Udaya Shankar Natarajan, K. S. Srivani, James Stevens, Ravi Subrahmanyan, Steven J. Tingay, Mark F. Waterson, Rachel Lindsey Webster, Alan R. Whitney, Andrew J. Williams, Christopher L. Williams, and J. Stuart B. Wyithe

Published
2015

3. The Murchison Widefield Array Correlator

Author

Justin C. Kasper, Jamie Stevens, Lu Feng, J. Riding, Martin Bell, Ron Remillard, J. S. B. Wyithe, Joseph E. Salah, A. Roshi, Rachel L. Webster, K. S. Srivani, Frank H. Briggs, Robert F. Goeke, Lincoln J. Greenhill, Natasha Hurley-Walker, Andrew Williams, A. Ewell-Wice, Emil Lenc, Gianni Bernardi, Divya Oberoi, M. Waterson, Bryna J. Hazelton, Avinash A. Deshpande, Pietro Procopio, Nadia Kudryavtseva, Steven Tingay, Alan E. E. Rogers, Eric Kratzenberg, Robert J. Sault, Eric R. Morgan, Stephen M. Ord, Stephen R. McWhirter, Miguel F. Morales, Colin J. Lonsdale, Alan R. Whitney, John D. Bunton, Brian E. Corey, David Emrich, Thiagaraj Prabu, Luke Hindson, Ravi Subrahmanyan, Joseph Pathikulangara, David L. Kaplan, A. R. Offringa, B. B. Kincaid, D. Pallot, Melanie Johnston-Hollitt, M. J. Lynch, Brian Crosse, Daniel C. Jacobs, S. E. Tremblay, L. deSouza, Bartosz Pindor, Judd D. Bowman, Randall B. Wayth, David Herne, Daniel A. Mitchell, R. Koenig, Benjamin McKinley, David G. Barnes, Jacqueline N. Hewitt, Roger J. Cappallo, N. Udaya Shankar, N. D. R. Bhat, W. Arcus, Michael A. Clark, Christopher L. Williams, ITA, USA, AUS, Haystack Observatory, Cappallo, Roger J., Corey, Brian E., Kincaid, Barton B., Kratzenberg, Eric W., Lonsdale, Colin John, McWhirter, Stephen R., Rogers, Alan E. E., Salah, Joseph E., Whitney, Alan R., Ewall-Wice, Aaron Michael, Feng, Lu, Goeke, Robert F., Hewitt, Jacqueline N., Morgan, Edward H., Remillard, Ronald Alan, and Williams, Christopher Leigh

Subjects
FOS: Computer and information sciences, Aperture, FOS: Physical sciences, Murchison Widefield Array, 02 engineering and technology, 01 natural sciences, Signal, law.invention, Computational Engineering, Finance, and Science (cs.CE), Telescope, law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Astronomical interferometer, Computer Science - Computational Engineering, Finance, and Science, Field-programmable gate array, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, Physics, business.industry, 020206 networking & telecommunications, Astronomy and Astrophysics, Interferometry, Space and Planetary Science, Astrophysics - Instrumentation and Methods for Astrophysics, business, Tera, Computer hardware
Abstract

The Murchison Widefield Array (MWA) is a Square Kilometre Array (SKA) Precursor. The telescope is located at the Murchison Radio--astronomy Observatory (MRO) in Western Australia (WA). The MWA consists of 4096 dipoles arranged into 128 dual polarisation aperture arrays forming a connected element interferometer that cross-correlates signals from all 256 inputs. A hybrid approach to the correlation task is employed, with some processing stages being performed by bespoke hardware, based on Field Programmable Gate Arrays (FPGAs), and others by Graphics Processing Units (GPUs) housed in general purpose rack mounted servers. The correlation capability required is approximately 8 TFLOPS (Tera FLoating point Operations Per Second). The MWA has commenced operations and the correlator is generating 8.3 TB/day of correlation products, that are subsequently transferred 700 km from the MRO to Perth (WA) in real-time for storage and offline processing. In this paper we outline the correlator design, signal path, and processing elements and present the data format for the internal and external interfaces., Comment: 17 pages, 9 figures. Accepted for publication in PASA. Some figures altered to meet astro-ph submission requirements

Published
2015

4. First limits on the 21 cm power spectrum during the Epoch of X-ray heating

Author

Ewell-Wice, A., Dillon, Joshua, Hewitt, Jacqueline N, Loeb, Abraham, Mesinger, A., Neben, A R, Offringa, A., Tegmark, Max, Barry, N, Beardsley, A. P., Bernardi, G, Briggs, Franklin, Bowman, Judd D, Feng, Lu, Greenhill, Lincoln, Johnston-Hollitt, M, Jacobs, Daniel C., Kaplan, D L, Thyagarajan, Nithyanandan, Oberoi, D, Pindor, B., Prabu, T, Rogers, Alan, Udaya Shankar, N., Srivani, K. S., Whitney, Alan, Williams, Christopher L, Cappallo, R. J, Carroll, P, Corey, B.E, de Oliveira-Costa,, A, Emrich, David, Gaensler, B M, Goeke, R, Hazelton, B, Hurley-Walker, Natasha, Kasper, J.C., Kim, HS, Kratzenberg, Eric, Lenc, E, Line, J, Lonsdale, Colin J, Lynch, Mervyn J, McKinley, B, McWhirter, S.R., Mitchell, D.A., Morales, Miguel F, Morgan, Edward H, Ord, S M, Paul, S, Pober, J. C., Procopio, P., Riding, J, Roshi, A., Sethi, Shiv K, Subrahmanyan, R., Sullivan, I S, Tingay, S.J., Trott, C. M., Waterson, Mark, Wayth, Randall, B., Webster, Rachel L, Williams, A, Wu, Chen, Wyithe, J Stuart B, Ewell-Wice, A., Dillon, Joshua, Hewitt, Jacqueline N, Loeb, Abraham, Mesinger, A., Neben, A R, Offringa, A., Tegmark, Max, Barry, N, Beardsley, A. P., Bernardi, G, Briggs, Franklin, Bowman, Judd D, Feng, Lu, Greenhill, Lincoln, Johnston-Hollitt, M, Jacobs, Daniel C., Kaplan, D L, Thyagarajan, Nithyanandan, Oberoi, D, Pindor, B., Prabu, T, Rogers, Alan, Udaya Shankar, N., Srivani, K. S., Whitney, Alan, Williams, Christopher L, Cappallo, R. J, Carroll, P, Corey, B.E, de Oliveira-Costa,, A, Emrich, David, Gaensler, B M, Goeke, R, Hazelton, B, Hurley-Walker, Natasha, Kasper, J.C., Kim, HS, Kratzenberg, Eric, Lenc, E, Line, J, Lonsdale, Colin J, Lynch, Mervyn J, McKinley, B, McWhirter, S.R., Mitchell, D.A., Morales, Miguel F, Morgan, Edward H, Ord, S M, Paul, S, Pober, J. C., Procopio, P., Riding, J, Roshi, A., Sethi, Shiv K, Subrahmanyan, R., Sullivan, I S, Tingay, S.J., Trott, C. M., Waterson, Mark, Wayth, Randall, B., Webster, Rachel L, Williams, A, Wu, Chen, and Wyithe, J Stuart B

Published
2016

5. The Murchison Widefield Array Correlator

Author

Ord, SM, Crosse, B, Emrich, D, Pallot, D, Wayth, RB, Clark, MA, Tremblay, SE, Arcus, W, Barnes, D, Bell, M, Bernardi, G, Bhat, NDR, Bowman, JD, Briggs, F, Bunton, JD, Cappallo, RJ, Corey, BE, Deshpande, AA, deSouza, L, Ewell-Wice, A, Feng, L, Goeke, R, Greenhill, LJ, Hazelton, BJ, Herne, D, Hewitt, JN, Hindson, L, Hurley-Walker, N, Jacobs, D, Johnston-Hollitt, M, Kaplan, DL, Kasper, JC, Kincaid, BB, Koenig, R, Kratzenberg, E, Kudryavtseva, N, Lenc, E, Lonsdale, CJ, Lynch, MJ, McKinley, B, McWhirter, SR, Mitchell, DA, Morales, MF, Morgan, E, Oberoi, D, Offringa, A, Pathikulangara, J, Pindor, B, Prabu, T, Procopio, P, Remillard, RA, Riding, J, Rogers, AEE, Roshi, A, Salah, JE, Sault, RJ, Shankar, NU, Srivani, KS, Stevens, J, Subrahmanyan, R, Tingay, SJ, Waterson, M, Webster, RL, Whitney, AR, Williams, A, Williams, CL, Wyithe, JSB, Ord, SM, Crosse, B, Emrich, D, Pallot, D, Wayth, RB, Clark, MA, Tremblay, SE, Arcus, W, Barnes, D, Bell, M, Bernardi, G, Bhat, NDR, Bowman, JD, Briggs, F, Bunton, JD, Cappallo, RJ, Corey, BE, Deshpande, AA, deSouza, L, Ewell-Wice, A, Feng, L, Goeke, R, Greenhill, LJ, Hazelton, BJ, Herne, D, Hewitt, JN, Hindson, L, Hurley-Walker, N, Jacobs, D, Johnston-Hollitt, M, Kaplan, DL, Kasper, JC, Kincaid, BB, Koenig, R, Kratzenberg, E, Kudryavtseva, N, Lenc, E, Lonsdale, CJ, Lynch, MJ, McKinley, B, McWhirter, SR, Mitchell, DA, Morales, MF, Morgan, E, Oberoi, D, Offringa, A, Pathikulangara, J, Pindor, B, Prabu, T, Procopio, P, Remillard, RA, Riding, J, Rogers, AEE, Roshi, A, Salah, JE, Sault, RJ, Shankar, NU, Srivani, KS, Stevens, J, Subrahmanyan, R, Tingay, SJ, Waterson, M, Webster, RL, Whitney, AR, Williams, A, Williams, CL, and Wyithe, JSB

Abstract

The Murchison Widefield Array is a Square Kilometre Array Precursor. The telescope is located at the Murchison Radio–astronomy Observatory in Western Australia. The MWA consists of 4 096 dipoles arranged into 128 dual polarisation aperture arrays forming a connected element interferometer that cross-correlates signals from all 256 inputs. A hybrid approach to the correlation task is employed, with some processing stages being performed by bespoke hardware, based on Field Programmable Gate Arrays, and others by Graphics Processing Units housed in general purpose rack mounted servers. The correlation capability required is approximately 8 tera floating point operations per second. The MWA has commenced operations and the correlator is generating 8.3 TB day−1 of correlation products, that are subsequently transferred 700 km from the MRO to Perth (WA) in real-time for storage and offline processing. In this paper, we outline the correlator design, signal path, and processing elements and present the data format for the internal and external interfaces.

Published
2015

6. The Murchison Widefield Array Correlator

Author

Ord, Stephen, Crosse, B., Emrich, D., Pallot, D., Wayth, Randall, Clark, M., Tremblay, S., Arcus, W., Barnes, D., Bell, M., Bernardi, G., Bhat, N., Bowman, J., Briggs, F., Bunton, J., Cappallo, R., Corey, B., Deshpande, A., deSouza, L., Ewell-Wice, A., Feng, L., Goeke, R., Greenhill, L., Hazelton, B., Herne, D., Hewitt, J., Hindson, L., Hurley-Walker, N., Jacobs, D., Johnston-Hollitt, M., Kaplan, D., Kasper, J., Kincaid, B., Koenig, R., Kratzenberg, E., Kudryavtseva, N., Lenc, E., Lonsdale, C., Lynch, Mervyn, McKinley, B., McWhirter, S., Mitchell, D., Morales, M., Morgan, E., Oberoi, D., Offringa, A., Pathikulangara, J., Pindor, B., Prabu, T., Procopio, P., Remillard, R., Riding, J., Rogers, A., Roshi, A., Salah, J., Sault, R., Shankar, N., Srivani, K., Stevens, J., Subrahmanyan, R., Tingay, Steven, Waterson, M., Webster, R., Whitney, A., Williams, A., Williams, C., Wyithe, J., Ord, Stephen, Crosse, B., Emrich, D., Pallot, D., Wayth, Randall, Clark, M., Tremblay, S., Arcus, W., Barnes, D., Bell, M., Bernardi, G., Bhat, N., Bowman, J., Briggs, F., Bunton, J., Cappallo, R., Corey, B., Deshpande, A., deSouza, L., Ewell-Wice, A., Feng, L., Goeke, R., Greenhill, L., Hazelton, B., Herne, D., Hewitt, J., Hindson, L., Hurley-Walker, N., Jacobs, D., Johnston-Hollitt, M., Kaplan, D., Kasper, J., Kincaid, B., Koenig, R., Kratzenberg, E., Kudryavtseva, N., Lenc, E., Lonsdale, C., Lynch, Mervyn, McKinley, B., McWhirter, S., Mitchell, D., Morales, M., Morgan, E., Oberoi, D., Offringa, A., Pathikulangara, J., Pindor, B., Prabu, T., Procopio, P., Remillard, R., Riding, J., Rogers, A., Roshi, A., Salah, J., Sault, R., Shankar, N., Srivani, K., Stevens, J., Subrahmanyan, R., Tingay, Steven, Waterson, M., Webster, R., Whitney, A., Williams, A., Williams, C., and Wyithe, J.

Abstract

The Murchison Widefield Array is a Square Kilometre Array Precursor. The telescope is located at the Murchison Radio–astronomy Observatory in Western Australia. The MWA consists of 4 096 dipoles arranged into 128 dual polarisation aperture arrays forming a connected element interferometer that cross-correlates signals from all 256 inputs. A hybrid approach to the correlation task is employed, with some processing stages being performed by bespoke hardware, based on Field Programmable Gate Arrays, and others by Graphics Processing Units housed in general purpose rack mounted servers. The correlation capability required is approximately 8 tera floating point operations per second. The MWA has commenced operations and the correlator is generating 8.3 TB day−1 of correlation products that are subsequently transferred 700 km from the MRO to Perth (WA) in real-time for storage and offline processing. In this paper, we outline the correlator design, signal path, and processing elements and present the data format for the internal and external interfaces.

Published
2015

7. The Murchison Widefield Array Correlator

Author

Ord, S. M., primary, Crosse, B., additional, Emrich, D., additional, Pallot, D., additional, Wayth, R. B., additional, Clark, M. A., additional, Tremblay, S. E., additional, Arcus, W., additional, Barnes, D., additional, Bell, M., additional, Bernardi, G., additional, Bhat, N. D. R., additional, Bowman, J. D., additional, Briggs, F., additional, Bunton, J. D., additional, Cappallo, R. J., additional, Corey, B. E., additional, Deshpande, A. A., additional, deSouza, L., additional, Ewell-Wice, A., additional, Feng, L., additional, Goeke, R., additional, Greenhill, L. J., additional, Hazelton, B. J., additional, Herne, D., additional, Hewitt, J. N., additional, Hindson, L., additional, Hurley-Walker, N., additional, Jacobs, D., additional, Johnston-Hollitt, M., additional, Kaplan, D. L., additional, Kasper, J. C., additional, Kincaid, B. B., additional, Koenig, R., additional, Kratzenberg, E., additional, Kudryavtseva, N., additional, Lenc, E., additional, Lonsdale, C. J., additional, Lynch, M. J., additional, McKinley, B., additional, McWhirter, S. R., additional, Mitchell, D. A., additional, Morales, M. F., additional, Morgan, E., additional, Oberoi, D., additional, Offringa, A., additional, Pathikulangara, J., additional, Pindor, B., additional, Prabu, T., additional, Procopio, P., additional, Remillard, R. A., additional, Riding, J., additional, Rogers, A. E. E., additional, Roshi, A., additional, Salah, J. E., additional, Sault, R. J., additional, Udaya Shankar, N., additional, Srivani, K. S., additional, Stevens, J., additional, Subrahmanyan, R., additional, Tingay, S. J., additional, Waterson, M., additional, Webster, R. L., additional, Whitney, A. R., additional, Williams, A., additional, Williams, C. L., additional, and Wyithe, J. S. B., additional

Published
2015
Full Text
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