Sanjay Bhatnagar | Scientist | Group Lead | Reports to Head DMSD |
Mingyu (Genie) Hsieh | Software Engg-IV (New Hire) | Reports to Lead ARDG | |
Preshanth Jagannathan | Assit. Scientist | Reports to Lead ARDG | |
Martin Pokorny | Software Engg-IV, ngVLA | Reports to Lead ARDG | |
Brian Kirk | NRAO Student Intern/PhD Student | Reports to Lead ARDG | |
Srikrishna Sekhar | NRAO-IDIA/SA Joint PDF | Reports to Lead ARDG/Director IDIA |
Reference | Author(s) | Date |
Wideband Mosaic Imaging for VLASS | U.Rau, S.Bhatnagar | Sep 2018 |
Building a model for antenna aperture illumination pattern | S.Sekhar, P.Jagannathan, B.Kirk, S.Bhatnagar, R.A.Taylor | Feb 2019 |
Reference | Author(s) | Date |
Understanding and using the AWProjection algorithm | S. Bhatnagar | Sept. 7, 2018 |
Algorithms R&D Update: Retrospective 2019 + Proposed plan 2020 | S. Bhatnagar | Jan. 22, 2020 |
TOPIC | DESCRIPTION | DATE |
Foundations of radio interferometric observations | Details of the measurement process in theory and in practice | MM/DD/YY |
Demystification of post-processing: Understanding RA calibration and indirect imaging | Simplified description of the theoretical framework for calibration and imaging | MM/DD/YY |
Quantization in the measurement chain | Understanding the effects of the inevitable quantization at various stages of the measurement, calibration & imaging process | MM/DD/YY |
User-level understanding the algorithmic framework implementation in CASA | Mapping the theory to the data processing operations most users are familiar with | MM/DD/YY |
Understanding connections between algorithms, imaging performance and computing load | Impact on run-time of the algorithmic choices, estimating what's needed when | MM/DD/YY |
Deconvolution through the ages | A review and comparison of deconvolution algorithm formulations over the past 20yrs. | MM/DD/YY |
Spectral Line Deconvolution | State of the art in line search algorithms and the need for joint deconvolution algorithms | MM/DD/YY |
RFI mitigation | ngVLA study and other ideas to pursue at the VLA. Review of what other observatories do | MM/DD/YY |
Faraday Rotation Synthesis | Review of methods and what would be useful to adopt here | MM/DD/YY |
Wide-field Imaging | Review of methods such as AW-Projection, Different types of DD-cals, Using spherical geometry for W-term, etc | MM/DD/YY |
Single Dish and Interferometer Combinations | State of the art and outstanding problems/requirements | MM/DD/YY |
Generic HPC solver frameworks | Moving beyond our standard chi-square minimization and major/minor cycles for next gen algorithms | MM/DD/YY |
Primary Beam Models | CASA's models, Zernicke models for ALMA/VLA/MeerKAT, Review of other approaches, guidelines for what a good model is | MM/DD/YY |
Full Mueller Imaging | Review of methods, explanation of Full Mueller Imaging vs what is usually described as Full-Stokes Imaging | MM/DD/YY |
Machine Learning Applications | Do we have use cases where Machine Learning and AI will halp ? | MM/DD/YY |
Pipeline Heuristics | Invite SRDP/ALMA/VLA pipeline folk to describe top heuristics they depend on plus unsolved algorithmic problems they face | MM/DD/YY |
Simulations in CASA | Going beyond simobserve. | MM/DD/YY |
I | Attachment | Action | Size | Date | Who | Comment |
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ARDG_ManagementPlan_Final.pdf | manage | 537 K | 2018-09-24 - 15:27 | SanjayBhatnagar | ARDG/Proposal Mangement Plan (2018) |
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ARDG_Original_Proposal.pdf | manage | 20 K | 2009-03-19 - 18:23 | GarethHunt | Original Proposal |
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ARDG_VLASS_Imaging_Report_v2.pdf | manage | 1 MB | 2018-09-28 - 11:20 | SanjayBhatnagar | VLASS Imaging Test Report (June-Aug 2018) |
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AtoZSolver.pdf | manage | 5 MB | 2019-02-26 - 16:50 | PreshanthJagannathan | Building an aperture illumination model using zernike polynomials |
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HPCForUsers.pdf | manage | 2 MB | 2011-08-19 - 17:04 | KumarGolap | HPC talk |
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ImagingWithAWProject.pdf | manage | 6 MB | 2018-09-24 - 15:16 | SanjayBhatnagar | Using and understanding AWProjection algorithm |
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LectureAutoFlagSummary.pdf | manage | 28 K | 2011-08-07 - 20:25 | SanjayBhatnagar | Thrusday Lecture Series, Lecture 3.1: Summry of auto-flagging algorithms |
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LectureBasicsIntro.pdf | manage | 1 MB | 2011-08-07 - 20:22 | SanjayBhatnagar | Thrusday Lecture Series, Lecture 1: Introduction |
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LectureCalibration.pdf | manage | 1 MB | 2011-08-07 - 20:27 | SanjayBhatnagar | Thrusday Lecture Series, Lecture 3.2: Calibration |
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LectureWideBand.pdf | manage | 5 MB | 2011-08-07 - 20:23 | SanjayBhatnagar | Thrusday Lecture Series, Lecture 1: Wideband Imaging |
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LectureWideField.pdf | manage | 2 MB | 2011-08-07 - 20:24 | SanjayBhatnagar | Thrusday Lecture Series, Lecture 1: Widefield Imaging |
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Mosaicking_aoc.pdf | manage | 692 K | 2011-08-12 - 10:58 | KumarGolap | Mosaic presentation slides |
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SummaryImagingRadioInterferometry.pdf | manage | 365 K | 2018-10-11 - 12:16 | UrvashiRV | Summary of Image Reconstruction Algorithms in RI (as of summer 2018) |
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WedLunch_15Jan2020.pdf | manage | 12 MB | 2020-01-22 - 16:50 | SanjayBhatnagar | /home/dhruva/disk1/sanjay/Work/Talks/NRAO/WedLunch/15Jan2020/ |