20021105: Setting up LDM for McIDAS-XCD (cont.)

>From: Richard Massa <address@hidden>
>Organization: UC Davis
>Keywords: 200210282019.g9SKJIX04447 McIDAS-XCD mcscour

Hi Richard,

Here is a good example that illustrates the need to scour the XCD created
MD and GRID files before they get to be 10 days old.

I was watching atm20, when I decided to see how big the XCD GRID files
are.  I saw one GRID file, GRID0009, that was over 1 GB.  Since this
is a very unusual situation, I decided to do a list of the contents
of the file.  I found that grids from 2002299 (26 Oct 2002) and today,
2002309 (05 Nov 2002).  I deleted the file and then took a look at
other GRID files where I found the same situation:

mcidas@atm20:~/workdata$ grdlist.k MYDATA/GRIDS.5809 NUM=ALL
Dataset position 5809   Directory Title= ALL  12Z AVN 0  HR<=VT<=24 HR
PAR    LEVEL       DAY        TIME    SRC FHOUR     FDAY       FTIME  GRID  PRO
---- --------- ------------ -------- ---- ----- ------------ -------- ----- ----
T     850 MB   26 OCT 02299 12:00:00  AVN    12 27 OCT 02300 00:00:00     1 MERC
T     700 MB   26 OCT 02299 12:00:00  AVN    12 27 OCT 02300 00:00:00     2 MERC
T     600 MB   26 OCT 02299 12:00:00  AVN    12 27 OCT 02300 00:00:00     3 MERC
T     500 MB   26 OCT 02299 12:00:00  AVN    12 27 OCT 02300 00:00:00     4 MERC
T     400 MB   26 OCT 02299 12:00:00  AVN    12 27 OCT 02300 00:00:00     5 MERC
T     300 MB   26 OCT 02299 12:00:00  AVN    12 27 OCT 02300 00:00:00     6 MERC
T     250 MB   26 OCT 02299 12:00:00  AVN    12 27 OCT 02300 00:00:00     7 MERC
T     200 MB   26 OCT 02299 12:00:00  AVN    12 27 OCT 02300 00:00:00     8 MERC
T     150 MB   26 OCT 02299 12:00:00  AVN    12 27 OCT 02300 00:00:00     9 MERC

 ...

U     500 MB   05 NOV 02309 12:00:00  AVN    18 06 NOV 02310 06:00:00  2683 MERC
U     850 MB   05 NOV 02309 12:00:00  AVN    18 06 NOV 02310 06:00:00  2684 MERC
V     250 MB   05 NOV 02309 12:00:00  AVN    18 06 NOV 02310 06:00:00  2685 MERC
V     500 MB   05 NOV 02309 12:00:00  AVN    18 06 NOV 02310 06:00:00  2686 MERC
V     850 MB   05 NOV 02309 12:00:00  AVN    18 06 NOV 02310 06:00:00  2687 MERC
PCP  SFC       05 NOV 02309 12:00:00  AVN    18 06 NOV 02310 06:00:00  2688 MERC
P    MSL       05 NOV 02309 12:00:00  AVN    18 06 NOV 02310 06:00:00  2689 MERC
U      10 M    05 NOV 02309 12:00:00  AVN    18 06 NOV 02310 06:00:00  2690 MERC
V      10 M    05 NOV 02309 12:00:00  AVN    18 06 NOV 02310 06:00:00  2691 MERC
TMAX    2 M    05 NOV 02309 12:00:00  AVN    12 06 NOV 02310 00:00:00  2692 MERC
TMIN    2 M    05 NOV 02309 12:00:00  AVN    12 06 NOV 02310 00:00:00  2693 MERC
T       2 M    05 NOV 02309 12:00:00  AVN    18 06 NOV 02310 06:00:00  2694 MERC
Number of grids listed = 2694
GRDLIST - done


Because of this, I will be deleting all of the GRID files that are
supposed to be for today (the GRID files that end in a '9', like 5809,
etc.) as soon as the clock rolls by 0 Z.  This will start the GRID
decoding out from scratch again in the same way that deleting all of
the MD files did for the POINT data (I should have deleted all of the
GRID files earlier, but I didn't).

Tom