1 / 11

LOFAR Beam-Formed Data Pipeline Overview

Explore the scientific applications and processing requirements of the Pulsar/Beam-Formed Pipeline, covering known pulsars, fast transient surveys, and observations of planets, the Sun, and flare stars. Learn about the unique capabilities of LOFAR "Beams" and how the pipeline facilitates high timing resolution observations. The text explains the challenging aspects of forming multiple beams and how the Beam-Formed Data Flow operates online and offline.

guadalupephillips
Download Presentation

LOFAR Beam-Formed Data Pipeline Overview

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. LOFAR Beam Formed (BF) Data & PipelineOverviewSeptember 9, 2010 Anastasia Alexov & The Pulsar Working Group & ASTRON SW Group

  2. Transient Science • Pulsar/Beam-Formed Pipeline has many scientific applications. The following areas of study set the requirements on processing for each of the modes: • Known pulsars - channelization, Stokes Parameters, dedispersion, folding, Radio Frequency Interference (RFI) excision • Pulsar/fast transient survey - channelization, dedispersion [10,000 trial Dispersion Measures (DMs)], RFI excision, searching • Planets, Sun, flare stars - channelization, RFI excision, dynamic spectra, Stokes Parameters Pulsar SOHO Sun

  3. LOFAR “Beams” Tied-Array (Pencil) Beams Station Beams • Low Band Antennas (LBA): 10-80MHz • High Band Antennas (HBA): 100-240MHz • One to N Stations can be use to observe • Imaging and high time resolution observations can be done simultaneously • High time resolution observing mode will be widely used for Transient Science: • Forming multiple beams is a difficult observing mode • Beam-formed modes trade spatial resolution for time resolution • Pulsar Pipeline effort can be applied to other high timing resolution pipelines Element Beams Stations

  4. LOFAR “Beams” • Show Movie

  5. Beam-Formed Data Flow On-Line TAB Pipeline BF Writer BF Offline Pipeline

  6. Beam-Formed Pipeline Data Flow On-Line TAB Pipeline BF Writer BF Offline Pipeline

  7. BF -> to -> H5 Writer (bf2h5) Tied-Array (Pencil) Beams • BF Raw and BF TAB data  HDF5 BF file • Need online (BG/P TAB data) and • single-station (raw data only) • versions of bf2h5 • BF H5 Structure: Sub-Array Pointing Station Beams Element Beams Stations

  8. Data Packaging Options: One Table per Subband (1D) [Shown] One Table for all Subbands (ND) One Array per Subband (1D) One Array for all Subbands (ND)

  9. Beam-Formed Data Sizes (Challenging)

More Related