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Re: Serving radar data with THREDDS Data Server



On Tue, 23 Aug 2005, Ethan Davis wrote:

> Hi Glenn,
>
> I'm not totally on top of the GRIB 1 & 2 details so I'm CCing Robb
> Kambic who works on our GRIB 1 & 2 code. I think Robb has worked with
> NDFD data but I'm not absolutely sure. So I'll let him answer this in
> more detail.
>
> Ethan
>
> Glenn Rutledge wrote:
>
> > Hi Ethan-
> > man you guys have been busy....and well done to boot!
> >
> > Anyway- us NOMADian's just dealt with a nasty Grib 2 issue----there
> > are 3 templates from Grib2 Grib v5.0, .3, and .4. We had great
> > difficulty decoding that NDFD stuff with all of our Grib1 capabilities
> > /utilities- but we dummied down the grib2 to 1.
> > The point here is a question: what version of Girb template is your
> > TDS ready to serve?  The NDFD stuff? (v.0.3/4)

Glenn,

i'm little confused about what templates you are referring too? there are
many templates in grib2. the current grib decoder attached to the TDS does
decode NDFD data. if you make available a test file i'll check that it
works with your NDFD dataset.

robb...


> >
> > Brian- we need to get this on board asap- I'll ask Lei Lei to assist
> > (and is cc:ed for her to begin looking into this...!!) Thanks Lei Lei....
> >
> > Hope all is well-
> > Regards, Glenn
> >
> > Ethan Davis wrote:
> >
> >> Hi Brian,
> >>
> >> We would love it if you would try out the TDS. We are finishing up
> >> some final testing on the current release so things will be changing
> >> fairly rapidly for the next few days. Once that is done we'll have a
> >> stable release (still beta) ready to go. Here is the main
> >> documentation page on our development server
> >>
> >> http://motherlode.ucar.edu:8088/thredds/docs/
> >>
> >> The "Getting Started" link and "Security" link should give you an
> >> idea of what you need to do to run the TDS and some security issues
> >> to be aware of.
> >>
> >> Starting at http://motherlode.ucar.edu:8088/thredds/ is an HTML
> >> representation of our catalogs (add "catalog.xml" to get the XML
> >> catalogs). You can browse down to see the radar data (level 2 and 3)
> >> we are currently serving. We are working with the IDV folks to get it
> >> reading this data. I think we were talking with them about having
> >> something working in the next two months.
> >>
> >> We are serving a variety of data products. You can browse around and
> >> look at the different kinds of data we are serving. There's the
> >> radar, GRIB (1 and 2), netCDF, some GINI, and a few other kinds.
> >>
> >> (Again, these links are to our development server which goes up and
> >> down some. If you run into anything weird, wait a few minutes and try
> >> again. If it persists, let us know. :-)
> >>
> >> Let us know what you think. I'll let you know when we lock down a
> >> release.
> >>
> >> Ethan
> >>
> >> Brian Nelson wrote:
> >>
> >>> Ethan,
> >>>
> >>> This sounds very interesting and may be the way we could go here.
> >>> We've been "playing" around with a few options as to serving radar
> >>> data, but haven't really honed in on one.
> >>>
> >>> Could we try the TDS?  with some test cases?  What are IT security
> >>> issues we should be aware of?  What would it take to install and get
> >>> the TDS running here with some radar data?
> >>>
> >>> We haven't decided exactly to serve up the level II or level III as
> >>> a "smorgasborg" and there are a couple other projects that I need to
> >>> check with that may or may not benefit from the TDS.
> >>> It sounds as if we might be able to use this for other data products
> >>> too??
> >>>
> >>> Let's keep in touch and if the install is easy, we could just try it
> >>> in the next couple weeks.
> >>>
> >>> Thanks much.
> >>>
> >>> Brian Nelson
> >>>
> >>> Ethan Davis wrote:
> >>>
> >>>> Hi Glenn,
> >>>>
> >>>> Sounds good. Talk to you soon.
> >>>>
> >>>> Ethan
> >>>>
> >>>> Glenn Rutledge wrote:
> >>>>
> >>>>> Oh yes!
> >>>>> We're stalled on that since the ESMF is not what we had hoped.
> >>>>> So- with that-
> >>>>> Let's do it.  A certain Dr. Brian Nelson in our division can head
> >>>>> this up along with me, and we'll see what happens.  I will pursue
> >>>>> either way!!!
> >>>>>
> >>>>> I'm in the middle of about 4 deadlines...Let's talk in 2 weeks.
> >>>>> Brian (cc:ed can introduce himself and maybe you two can
> >>>>> communicate).  I'll place the TDS for our NOMADS, and we can
> >>>>> extend to other data forms as well.  Glenn
> >>>>>
> >>>>>
> >>>>>
> >>>>> Ethan Davis wrote:
> >>>>>
> >>>>>> Hi Glenn,
> >>>>>>
> >>>>>> Just wanted to touch base with you and see where you guys were
> >>>>>> with respect to serving radar data (level 2 and 3) and let you
> >>>>>> know what we have been doing. I know we had talked about this
> >>>>>> awhile back. Have you guys moved forward with serving radar data
> >>>>>> via OPeNDAP? Was it ESML-OPeNDAP you were looking at?
> >>>>>>
> >>>>>> We have been working on our THREDDS Data Server (TDS) which does
> >>>>>> a bunch of THREDDS stuff but also serves data with OPeNDAP. The
> >>>>>> TDS uses our netCDF-java library to read data. The netCDF-java
> >>>>>> library has been extended so it can read, besides netCDF files,
> >>>>>> GRIB-1, GRIB-2, radar level 2 and 3 data, and several others. So
> >>>>>> the TDS can serve all those types of data. We have been focusing
> >>>>>> on data that comes over the IDD and we are working with the IDV
> >>>>>> folks on reading the data into the IDV. They aren't reading the
> >>>>>> radar data from our server yet but that is were we want to head.
> >>>>>>
> >>>>>> We are ready to for a beta release of the TDS and are looking for
> >>>>>> some sites that might be interested in working with us to install
> >>>>>> a TDS. Would you guys be interested? Or not until we pull it out
> >>>>>> of beta? Or do you have an existing solution that is working for
> >>>>>> you?
> >>>>>>
> >>>>>> Let me know where you guys are with radar data and what you think
> >>>>>> about trying the TDS.
> >>>>>>
> >>>>>> Ethan
> >>>>>>
> >>>>>> PS Will is almost 14 months now and started walking a week or two
> >>>>>> ago. He sure is fun.
> >>>>>>
> >>>>>
> >>>>
> >>
> >
>
> --
> Ethan R. Davis                                Telephone: (303) 497-8155
> Software Engineer                             Fax:       (303) 497-8690
> UCAR Unidata Program Center                   E-mail:    address@hidden
> P.O. Box 3000
> Boulder, CO  80307-3000                       http://www.unidata.ucar.edu/
> ---------------------------------------------------------------------------
>
>

===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================


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