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Authors = Adrian Pope

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14 pages, 2447 KiB  
Article
Prospects of GPU Tensor Core Correlation for the SMA and the ngEHT
by Wei Yu, John W. Romein, L. Jonathan Dursi, Ru-Sen Lu, Adrian Pope, Gareth Callanan, Dominic W. Pesce, Lindy Blackburn, Bruce Merry, Ranjani Srinivasan, Jongsoo Kim and Jonathan Weintroub
Galaxies 2023, 11(1), 13; https://doi.org/10.3390/galaxies11010013 - 11 Jan 2023
Cited by 4 | Viewed by 3935
Abstract
Building on the base of the existing telescopes of the Event Horizon Telescope (EHT) and ALMA, the next-generation EHT (ngEHT) aspires to deploy ∼10 more stations. The ngEHT targets an angular resolution of ∼15 microarcseconds. This resolution is achieved using Very Long Baseline [...] Read more.
Building on the base of the existing telescopes of the Event Horizon Telescope (EHT) and ALMA, the next-generation EHT (ngEHT) aspires to deploy ∼10 more stations. The ngEHT targets an angular resolution of ∼15 microarcseconds. This resolution is achieved using Very Long Baseline Interferometry (VLBI) at the shortest radio wavelengths ∼1 mm. The Submillimeter Array (SMA) is both a standalone radio interferometer and a station of the EHT and will conduct observations together with the new ngEHT stations. The future EHT + ngEHT array requires a dedicated correlator to process massive amounts of data. The current correlator-beamformer (CBF) of the SMA would also benefit from an upgrade, to expand the SMA’s bandwidth and also match the EHT + ngEHT observations. The two correlators share the same basic architecture, so that the development time can be reduced using common technology for both applications. This paper explores the prospects of using Tensor Core Graphics Processing Units (TC GPU) as the primary digital signal processing (DSP) engine. This paper describes the architecture, aspects of the detailed design, and approaches to performance optimization of a CBF using the “FX” approach. We describe some of the benefits and challenges of the TC GPU approach. Full article
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38 pages, 1233 KiB  
Review
Open Access Data in Polar and Cryospheric Remote Sensing
by Allen Pope, W. Gareth Rees, Adrian J. Fox and Andrew Fleming
Remote Sens. 2014, 6(7), 6183-6220; https://doi.org/10.3390/rs6076183 - 1 Jul 2014
Cited by 34 | Viewed by 16362
Abstract
This paper aims to introduce the main types and sources of remotely sensed data that are freely available and have cryospheric applications. We describe aerial and satellite photography, satellite-borne visible, near-infrared and thermal infrared sensors, synthetic aperture radar, passive microwave imagers and active [...] Read more.
This paper aims to introduce the main types and sources of remotely sensed data that are freely available and have cryospheric applications. We describe aerial and satellite photography, satellite-borne visible, near-infrared and thermal infrared sensors, synthetic aperture radar, passive microwave imagers and active microwave scatterometers. We consider the availability and practical utility of archival data, dating back in some cases to the 1920s for aerial photography and the 1960s for satellite imagery, the data that are being collected today and the prospects for future data collection; in all cases, with a focus on data that are openly accessible. Derived data products are increasingly available, and we give examples of such products of particular value in polar and cryospheric research. We also discuss the availability and applicability of free and, where possible, open-source software tools for reading and processing remotely sensed data. The paper concludes with a discussion of open data access within polar and cryospheric sciences, considering trends in data discoverability, access, sharing and use. Full article
(This article belongs to the Special Issue Cryospheric Remote Sensing)
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