EOVSA Data products
Welcome to the EOVSA data products documentation. EOVSA observes the full disk of the Sun at all times when the Sun is >10 degrees above the local horizon, which is season dependent and ranges from 7-12 hours duration centered on 20 UT. During January, coverage will be 16-24 UT daily, 7 days/week. EOVSA will provide microwave spectra and imaging at up to 451 frequencies between 1 and 18 GHz. We deliver the radio interferometry data in level 0-2.
Brief description of the data products:
Our working definition is that Level 0 is the raw visibility data from the instrument, whereas Level 1 corresponds to the calibrated visibility data, which have all of the required content to produce Level 2 images and spectrogram data in standard FITS format. All of these data products are archived and available online, accessed from the EOVSA server.
- 1 Level 0 - Raw visibility data from the instrument
- 2 Level 1 - Calibrated visibility data
- 3 Level 2 - Images and spectrogram data in standard FITS format
Level 0 - Raw visibility data from the instrument
Level 1 - Calibrated visibility data
Level 1 data have all of the required content to produce Level 2 data products.
CASA 1-min averaged ms
EOVSA 1-min averaged visibility data in CASA ms format can be retrieved from the following page:
CASA Event ms
Level 2 - Images and spectrogram data in standard FITS format
Getting level 2 data
EOVSA Level 2 data products can be retrieved from the "synoptic data" page:
Example - get the synoptic data on December 25, 2019
- go to EOVSA browser page.
- Browse to December 25, 2019.
- Click "synoptic fits" button next to the calendar tool.
- Select the data product you want to download based on the name in the following list.
List of Level 2 data products
|Dynamic Spectrum||All-day TP spectrum||EOVSA_TPall_yyyymmdd.fts|
|All-day XP spectrum||EOVSA_XPall_yyyymmdd.fts|
|Synoptic 1.4 GHz image||eovsa_20191225.spw00-01.tb.disk.fits|
|Synoptic 3.0 GHz image||eovsa_20191225.spw02-05.tb.disk.fits|
|Synoptic 4.5 GHz image||eovsa_20191225.spw06-10.tb.disk.fits|
|Synoptic 6.8 GHz image||eovsa_20191225.spw11-20.tb.disk.fits|
|Synoptic 10.2 GHz image||eovsa_20191225.spw21-30.tb.disk.fits|
|Synoptic 13.9 GHz image||eovsa_20191225.spw31-43.tb.disk.fits|
Reading level 2 data
All-day TP spectrum
Daily total power full-Sun-integrated spectrogram calibrated in solar flux units are provided at 451 frequencies and 1 s time resolution.
from suncasa.eovsa import eovsa_dspec as ds ## define the dynamic spectrum file. tpfits = 'EOVSA_TPall_20191225.fts' ## display the dynamic spectrum. ds.dspec(tpfits)
All-day XP spectrum
Daily cross power spectrogram (mean flux from baselines with "intermediate" lengths) calibrated in solar flux units are provided at 451 frequencies and 1 s time resolution. XP spectrogram has much better sensitivity to weak bursts.
from suncasa.eovsa import eovsa_dspec as ds ## define the dynamic spectrum file. tpfits = 'EOVSA_XPall_20191225.fts' ## display the dynamic spectrum. ds.dspec(tpfits)