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20020624: NEXRAD Level III data in WSI format (cont.)

>From: Louis Nguyen <address@hidden>
>Organization: NASA/Langley
>Keywords: 200206241856.g5OIuJa26379 NEXRAD imagery

Louis,

>Sounds good.  I'll do the LDM installation now.

I _like_ someone that jump on things!

>The machine name is angler.larc.nasa.gov (128.155.17.143).

OK.  The machine that is setup to feed you is:  atm.geo.nsf.gov

Your ldmd.conf file (in ~ldm/etc/ldmd.conf) should end up looking 
more-or-less like:

--------------- snip for ldmd.conf ---------------------------------

#
# Programs that share a queue with rpc.ldmd
# are started by it and are in the same process group.
#

exec    "pqbinstats"
exec    "pqact"

#
# LDM5 servers we ask for data
#
#       request <feedset> <pattern> <hostname pattern>

# Request:
#
#        bref1-4(124nm), cref, bvel1-2, & precip1
#
# from:
#
#        BYX,AMX,TBW,MLB
#
# Note:  BREF1 <-> N0R   BVEL1 <-> N0V   CREF <-> NCR  PRECIP1 <-> N1P
#        BREF2 <-> N1R   BVEL2 <-> N1V
#        BREF3 <-> N2R
#        BREF4 <-> N3R

request NNEXRAD "/p(N[0123C]R|N[01]V|N1P)(BYX|AMX|TBW|MLB)" atm.geo.nsf.gov

###############################################################################
# Begin Access control
###############################################################################

###############################################################################
# ALLOW: Who we are willing to feed
#
# allow <feedset> <hostname pattern>
###############################################################################

# send anything to your own machine
allow   ANY
        
^((localhost|loopback)|(127\.0\.0\.1\.?$)|([a-z].*\.unidata\.ucar\.edu\.?$))

--------------- snip for ldmd.conf ---------------------------------

If you were going to FILE the products, one way your pqact.conf file could
look is:

--------------- snip for pqact.conf ---------------------------------

NNEXRAD ^SDUS[2357]. .... ([0-3][0-9])([0-2][0-9])([0-6][0-9]).*/p(...)(...)
        FILE    -close
        data/nexrad/raw/\5/\4/\4_(\1:yyyy)(\1:mm)\1_\2\3

--------------- snip for pqact.conf ---------------------------------

If you have never worked with the LDM before, I need to point out that the
entries in pqact.conf use tabs in several places as white space.  The
places in the above action that use white space are:

1) between the NNEXRAD and ^SDUS
2) before FILE
3) inbetween FILE and -close

All other white space in this example are spaces.

After creating/modifying a pqact.conf file, ALWAYS check its validity
using ldmadmin (assumes that the LDM setup is complete):

ldmadmin pqactcheck

If this indicates errors, you need to find and fix the errors before
proceeding.

Finally, if you have to modify your firewall setup, then you will need
to allow atm.geo.nsf.gov AND *.unidata.ucar.edu.  We want our machines
to be able to contact your LDM so that we can assist in troubleshooting
data problems.

>Thanks again,

No worries.

Tom