EOVSA Data Products: Difference between revisions
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[[File:pipeline_flowchart.jpg|center|600px]] | [[File:pipeline_flowchart.jpg|center|600px]] | ||
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. | 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. | ||
=Level 0 - Raw visibility data from the instrument= | |||
TBD | TBD | ||
=Level 1 - Calibrated visibility data= | |||
Level 1 data have all of the required content to produce Level 2 data products. | 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: | EOVSA 1-min averaged visibility data in CASA ms format can be retrieved from the following page: | ||
http://www.ovsa.njit.edu/fits/UDBms_slfcaled | http://www.ovsa.njit.edu/fits/UDBms_slfcaled | ||
==CASA Event ms== | |||
TBD | TBD | ||
=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: | EOVSA Level 2 data products can be retrieved from the "synoptic data" page: | ||
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==Reading level 2 data== | |||
===Software=== | |||
[https://github.com/suncasa/suncasa suncasa] | [https://github.com/suncasa/suncasa suncasa] | ||
===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. | Daily total power full-Sun-integrated spectrogram calibrated in solar flux units are provided at 451 frequencies and 1 s time resolution. | ||
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[[File:TPSP.jpeg|center|500px]] | [[File:TPSP.jpeg|center|500px]] | ||
===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. | 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. | ||
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[[File:XPSP.jpeg|500px| center]] | [[File:XPSP.jpeg|500px| center]] | ||
===Synoptic 6-band Images=== | |||
Full disk images at 6 selected frequency bands centered at 1.4, 3.0, 4.5, 6.8, 10.2, and 13.9 GHz are provided once per day, calibrated in brightness temperature. [[File:synoptic_image.jpg| center |400px]] | Full disk images at 6 selected frequency bands centered at 1.4, 3.0, 4.5, 6.8, 10.2, and 13.9 GHz are provided once per day, calibrated in brightness temperature. [[File:synoptic_image.jpg| center |400px]] | ||
===10-min 6-band Images=== | |||
===Event images=== | |||
Revision as of 21:23, 23 March 2020
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.
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.
Level 0 - Raw visibility data from the instrument
TBD
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:
http://www.ovsa.njit.edu/fits/UDBms_slfcaled
CASA Event ms
TBD
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:
http://www.ovsa.njit.edu/fits/synoptic
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
| category | data product | name |
|---|---|---|
| Dynamic Spectrum | All-day TP spectrum | EOVSA_TPall_yyyymmdd.fts |
| All-day XP spectrum | EOVSA_XPall_yyyymmdd.fts | |
| Image | ||
| 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
Software
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)
Synoptic 6-band Images
Full disk images at 6 selected frequency bands centered at 1.4, 3.0, 4.5, 6.8, 10.2, and 13.9 GHz are provided once per day, calibrated in brightness temperature.
