Daily Gain Calibration

Similar as reference complex gain calibration, daily gain calibration refers to tuning the "system" amplitude and phase as a function of IF band at a finer level. Typically, daily gain calibration would be carried out three times between two reference gain calibrations every day. We have a routine to retrieve and analyze the daily gain calibration data, named phacal_anal.py. Start from a timestamp (Note: The time of day is important! Make sure to set it to somewhere in the middle of the day, e.g. 15:00 UT)

import phacal_anal as pa
from util import Time
t = Time('2017-07-03 15:00')
pa.phacal_anal(t)

phacal_anal will find all daily gain calibrations occurred during that natural day (CA local time).

Commands for calibrating the eclipse [temporary]

15:00 UT

First run the refcal analysis for the day (can be done by 15:00 UT):

from util import Time
import refcal_anal as ra
import cal_header as ch
out = ra.rd_refcal(Time(['2017-08-21 11:00','2017-08-21 14:00'))
out_corr = ra.unrot_refcal(out)
refcal = ra.refcal_anal(out)
ch.refcal2sql(refcal)

19:20 UT

Next, as soon as the solar (eclipse) UDB file appears (around 19:20 UT) run the pipeline processing. Change directory to the one where the final eclipse files will be, /data1/dgary/solar/eclipse. Note: the <tab> will complete the filename, but delete the trailing /.:

from util import Time
import pipeline_cal as pc
filename = '/data1/eovsa/fits/UDB/2017/UDB20170821155<tab>'
pc.udb_corr(filename)
== 20:00 UT ==
Run the phasecal analysis, answering y to questions about plots and accepting:
<pre>
from util import Time
import phacal_anal as pa
pa.phacal_anal(Time('2017-08-21 19:00'))

Immediately after that, exit ipython, cd to /data1/dgary/solar/eclipse and get into CASA, then do

default importeovsa
idbfiles = 'UDB20170821<tab>'