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Astrometric accuracy (celestial location) monitor
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Final approval of astromon/celmon web pages #30

Open javierggt opened 2 years ago

javierggt commented 2 years ago

There are two versions of celmon pages. Both have been modified in the latest astromon release, and are updated on a weekly basis. The change should be approved before going online.

Public MTA
current current
new new

These pages are saved in $SKA/data/astromon/web. For them to replace the older versions, the only thing we need to do is to create symbolic links (on $SKA):

mv www/ASPECT_CAL_PUBLIC/celmon www/ASPECT_CAL_PUBLIC/celmon_old
mv www/ASPECT/celmon www/ASPECT/celmon_old
ln -s data/astromon/web/cal www/ASPECT_CAL_PUBLIC/celmon
ln -s data/astromon/web/mta www/ASPECT/celmon
jeanconn commented 2 years ago

Looking at the new page at https://cxc.cfa.harvard.edu/mta/ASPECT/jgonzalez/celmon/mta/ , it has been so long since I've looked at it that I've forgotten how to interpret it.

Previously we'd look at celmon pages with the question of "is it still basically OK or do we need to update CALALIGN". How does one answer that question now?

javierggt commented 2 years ago

Previously we'd look at celmon pages with the question of "is it still basically OK or do we need to update CALALIGN". How does one answer that question now?

In what way is this different from before?

A "proper" way to answer this could be to look at whether a fixed number N of points deviate by more than x-sigma, with N and x still to determine. This page does not answer that, and neither did the old one.

This one at least gives a band to give you an idea, because just a scatter plot does not convey that.

jeanconn commented 2 years ago

Does the band tell me what corrections we've already put in CALALIGN or does it show me the offsets we should put in the next one?

javierggt commented 2 years ago

it tells you the offset in the latest processing of the OBSID. In this case it is a mixed state, because if we were to reprocess the data for OBSIDs before the CalDB was updated, then we would see no offset. OBSIDs from after the CalDB update should (in principle) show no offset.

It is a valid question, whether we should reprocess everything with the latest CalDB, but that is not what astromon does currently.