Custom Query (61 matches)

A list of FITS header keywords that need to be updated -- from RM:

For the rewrite, can you you please use v3.4 attached.

Main header:

NRCVR = 2
OBSBW = 32.0
OBSNCHAN = 256
COORD_MD = “J2000”

History table

SCALE = “UNCAL”
POL_TYPE = “AA+BB”
NSUB = the number of rows in the (completed) table.
NPOL = 1
CHAN_BW = 0.125

Subint table:

SCALE = “UNCAL”
POL_TYPE = “AA+BB”
NBIN_PRD = 1
NSUBOFFS = 0
NCHAN = 256 (replaces NCH_FILE)
CHAN_BW = -0.125
NCHNOFFS = 0 (replaces NCH_STRT)
NSBLK It might be good to increase this by a factor of 8 or maybe 16 to reduce the overhead of the subint header. At present the headers are about 10% of the data volume. A possible reason for not doing this is that you would generally have to pad the final row. Ideally this would be done with ones and zeros in alternate frequency channels for all pad samples.
DAT_FREQ. These should increase from 420.0625 as discussed above.

If you use the query form to perform a query where you select a range of years, then return to the query form, the pulldown list for year will begin at the year range you previously selected.

eg

select from 2000 to 2008 perform the query create a new query you will not be able to select 1999 or below.

CPSR2 observations consist of a directory containing several files, these have already been scrunched to l subint of duration 1 min each. The web archive identifies these observations as having 1 subint, but should be adding the number of subints from all directories

I will change the web interface to count the files in a CPSR2 directory in the meantime, but ultimately the script for loading the data into the database should be changed to do this instead.