Expanded Owens Valley Solar Array

EOVSA (Expanded Owens Valley Solar Array) is a new solar-dedicated radio interferometer operated by the New Jersey Institute of Technology. This wiki serves as the site for EOVSA documentation.

EOVSA Documentation

• General
  • Downconversion and Frequency Tuning
  • Dealing with Radio Frequency Interference
  • Switching between 200 MHz and 300 MHz Correlator

• Computer-Network
  • Computing Systems
  • Network

• Control System
  • 27-m Antenna Commands
  • Schedule Commands
  • Control Commands
  • Attenuation and Level Control

• Hardware
  • Hardware Overview
  • 2.1-m Antennas
  • 27-m Antennas

• System Software
  • Calibration Database
  • Stateframe Database
  • Create CASA measurement sets

• Calibration
  • Calibration Overview
  • Pointing Calibration
  • Total Power Calibration
  • System Gain Calibration
  • Antenna Position (Baseline Calibration)
  • Reference Gain Calibration
  • Daily Gain Calibration
  • Delay Calibration
  • Bandpass Calibration
  • Polarization Calibration
  • Calibrator Survey
  • Practical Calibration Tutorial

• Starburst

Using EOVSA Data

• Analysis Software
  • SunCASA A wrapper around CASA (the Common Astronomy Software Applications package) for synthesis imaging and visualizing solar spectral imaging data. CASA is one of the leading software tool for "supporting the data post-processing needs of the next generation of radio astronomical telescopes such as ALMA and VLA", an international effort led by the National Radio Astronomy Observatory. The current version of CASA uses Python (2.7) interface. More information about CASA can be found on NRAO's CASA website . Note, CASA is available ONLY on UNIX-BASED PLATFORMS (and therefore, so is SunCASA).
  • GSFIT A IDL-widget(GUI)-based spectral fitting package called gsfit, which provides a user-friendly display of EOVSA image cubes and an interface to fast fitting codes (via platform-dependent shared-object libraries).
  • Spectrogram Software
• Data Analysis Guides
  • EOVSA Data Analysis Tutorial at RHESSI XVIII Workshop
  • Self-Calibrating Flare Data Example script and guides for self-calibrating EOVSA flare data (to be completed)

• EOVSA Modeling Guide
  • GX Simulator

• Other helpful links
  • CASA Guides
  • SolarSoft IDL
  • Miriad Guides
  • Fast Gyrosynchrotron Codes (Alexey Kuznetsov's website)
  • Basic GitHub Tutorial

• Full Disk Simulations
• Analyzing Pre-2017 Data

System Software

• LabVIEW software
• Python code Github repository

Observing Log

2016 November; December

2017 January; February; March; April; May; June July; August; September; [[2017 October] | October]; November; December

2018 January

2018 February

2018 March

2018 April

2018 July

2019 March

2019 April

2019 May

2019 June

2019 July

2019 November

Tohbans

Trouble Shooting Guide

Tohban Records

EOVSA Flare List

See this link for a list of EOVSA flares as a Google Spreadsheet.

Another link available at the EOVSA website.

EOVSA Publications

Here is a (partial) list of publications that utilizes EOVSA data.

2018

Polito et al. (2018), ApJ, 864, 63 Broad Non-Gaussian Fe XXIV Line Profiles in the Impulsive Phase of the 2017 September 10 X8.3-class Flare Observed by Hinode/EIS

Gary et al. (2018), ApJ, 863, 83 Microwave and Hard X-Ray Observations of the 2017 September 10 Solar Limb Flare

Kuroda et al. (2018), ApJ, 852, 32 Three-dimensional Forward-fit Modeling of the Hard X-ray and the Microwave Emissions of the 2015 June 22 M6.5 flare

VLA Flare List

See this link for a list of VLA flare observations.