aiapy.calibrate.update_pointing(smap, *, pointing_table=None)[source]#

Update the pointing information in the input map header.

This function updates the pointing information in smap by updating the CRPIX1, CRPIX2, CDELT1, CDELT2, CROTA2 keywords in the header using the information provided in pointing_table. If pointing_table is not specified, the 3-hour pointing information is queried from the JSOC.


The method removes any PCi_j matrix keys in the header and updates the CROTA2 keyword.


If correcting pointing information for a large number of images, it is strongly recommended to query the table once for the appropriate interval and then pass this table in rather than executing repeated queries.


This function is only intended to be used for full-disk images at the full resolution of 4096x4096 pixels. It will raise a ValueError if the input map does not meet these criteria.

  • smap (AIAMap) – Input map.

  • pointing_table (QTable, optional) – Table of pointing information. If not specified, the table will be retrieved from JSOC.



See also