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20020814: canadian gem and nexrad
- Subject: 20020814: canadian gem and nexrad
- Date: Wed, 14 Aug 2002 15:09:58 -0600
>From: Mike Trexler <address@hidden>
>Organization: NCSU
>Keywords: 200208141743.g7EHhEK21033 IDD
Mike,
>I have two questions for you....
>
>1. I requested access to the canadian gem a couple weeks ago
>and have since been in touch with Dov who has allowed my feed.
>My question is what should my request line look like in my
>ldmd.conf?
Here is what we are using to ingest GEM data from CMC on a machine
here at the UPC:
#
# GEM data: (aka dns2.cmc.ec.gc.ca)
#
request CMC "CMC_GEM_reg_.*" ftp.cmc.ec.gc.ca
You may want to change this for your own use.
>All Dov has provided me is his machine name? What is the product stream name?
All LDM feed types are listed in:
http://www.unidata.ucar.edu/packages/ldm/feedtypes/index.html
From this page, you can see that equivalent feed types for GEM data
are: GEM, CMC, FT20.
>and then do I just specify ".*"?
What you want to ingest from any IDD stream is ultimately up to you.
I would start using the ".*" pattern and then look through what you
get and decide if you want to request less.
>2. I'm confused about the nexrad level III products. Maybe I'm
>stupid, because I did read the webpage about this, but still have
>questions. Here's what I want to do...simply get the 1 km
>mosaic that Chiz creates and injects in the idd.
The 1 km composite of base reflectivities at tilt 1 are included in
the FNEXRAD feed. They are sent with headers that look like:
rad/NEXRCOMP/1km/n0r_20020814_2005
>This is in Gini format, right?
Yes.
>Can you tell me exactly what I need to specify
>to start bringing this in?
A request line that looks like the following will work:
request FNEXRAD "^rad/NEXRCOMP/1km" <the upstream host you want to feed from>
You need to:
o replace the last bit above with the machine you are requesting the feed from
o add an action to your LDM's pqact.conf file to do something with the
products when they are received.
>thanks for everything,
You are welcome.
Tom Yoksas