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Hi John.... Probably have to be the week after next -- Tom Rink & Tommy Jasmin (and others) will be at a conference next week. Let's touch base when they return. tom On Tue, Jul 20, 2010 at 3:43 PM, <John.J.Bates@xxxxxxxx> wrote: > Tom, thanks for valuable input. Too many questions for a simple email. > It would probably be better to have a telecon with you and the Wisc > folks and a wider group at NCDC to have better interaction. > > I'm on my way to London for a CEOS meeting but back next week. How > about a telecon next week? (I'm off to the plane now so may not be able > to respond...) > > Regards, John > > ----- Original Message ----- > From: Tom Whittaker <whittaker@xxxxxxxx> > Date: Tuesday, July 20, 2010 1:48 pm > Subject: Re: [cf-satellite] Initial draft of a C-RDR structure for NPP > VIIRS data > >> Hi Jim... >> >> Regarding John Bates' note (below) and your post to the cf-satellite >> list, I wanted to express our interest in this work. As you may be >> aware, we have been working with the simulated JPSS data to help >> refine it's form. And, of course, we are working through this >> cf-satellite email list to define a starting CF convention for >> satellite data as part of our GOES-R work (it is moving along, but >> slowly), to provide a baseline for data providers and application >> developers so that little new code has to be written every time some >> new satellite data is made available. >> >> With regard to your and John's notes, though, we don't really know the >> context and thus several questions come to mind: is NOAA going to >> coordinate among their data providers to create one "standard format" >> for these data? Or will there be another step in the process (for >> example, logically combining files via NCML)? >> >> We also wonder if John's note, and your work, are related to what we >> are already engaged in doing with the simulated data? It is our >> understanding that this form would be very close to what will be >> available to users. Is that still the case, or is this a separate >> effort? >> >> And....is this related to CLASS and/or GRAVITE? >> >> Let me also comment on the NCML example you posted -- I am very >> disturbed by the use of "groups" -- even worse, nested groups. While >> this is certainly part of HDF5 and the NetCDF-4 "Model", using nested >> groups makes it extremely difficult to write generic applications that >> will be able to simply open a NetCDF file, gather all the variables >> and then attempt to make sense of them. It also makes it difficult to >> even inspect the data. If at all possible, I beg you to reconsider >> this since it will result in people having to write a lot of code >> specific to these data, just to paw their way through the >> forest....instead of just having a "getVariables()" call.... >> >> Let me add that the key to the cf-satellite convention effort is to >> lock in a basic form of the data that can be added to for specific >> needs (for example, adding "engineering data"), so that applications >> have a chance of understanding the basic structure and could, perhaps, >> present a sensible list of choices of parameters to a user....or just >> "know" what to do. >> >> Finally (for John?) -- Are we talking only about C-RDR level0 or >> L1B or both? >> >> Thanks ahead....and definitely count us "in"..... >> >> Best wishes, >> >> tom >> Tom Rink >> Tommy Jasmin >> >> --------------- Original Message from John Bates ----------------- >> From: "John J. Bates" <John.J.Bates@xxxxxxxx> >> Date: July 19, 2010 12:59:51 PM CDT >> To: <itsc17@xxxxxxxxxxxxx> >> Subject: VIIRS Climate-RDR reveiw >> >> Dear Colleagues, at ITSC-17 I mentioned that we have an effort to >> translate the original form of the NPP-JPSS raw data record (RDR) >> format into something more user friendly that would also contain all >> information needed to process into calibrated, navigated radiance >> data. We are now at the point where we are considering the specifics >> of how to write out the data (already decided NetCDF 4 CF-compliant) >> and wish to get you input as you are potential users. >> >> Those who would like to participate in getting information and >> providing feedback, please contact Jim Biard (Jim.Biard@xxxxxxxx) for >> more information. We will be doing the VIIRS data first, but will be >> doing all sensors on NPP eventually. >> >> Regards, John >> >> ----------------------------end---------------------------- >> >> -- >> Tom Whittaker >> University of Wisconsin-Madison >> Space Science & Engineering Center (SSEC) >> Cooperative Institute for Meteorological Satellite Studies (CIMSS) >> 1225 W. Dayton Street >> Madison, WI 53706 USA >> ph: +1 608 262 2759 >> > -- Tom Whittaker University of Wisconsin-Madison Space Science & Engineering Center (SSEC) Cooperative Institute for Meteorological Satellite Studies (CIMSS) 1225 W. Dayton Street Madison, WI 53706 USA ph: +1 608 262 2759
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