This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Hi Becky, Thanks for the clarification. Ethan On 12/5/2011 8:15 PM, Rebecca Cosgrove wrote: > Hi all. > Just wanted to throw in my 2 cents... Tom and I have talked about the > NAM nests, but till we get CONDUIT upgraded and can increase the LDM > queue, it's just too much data. So in the spring we can talk about this > addition. > > Becky > > On 12/5/2011 3:23 PM, Ethan Davis wrote: >> Hi Geoff, >> >> No, no buses. Thanks for the info. >> >> Yes, the Best Time Series does seem to be a popular view of the data. >> Once we start getting the data, we'll make it available as Best Time >> Series. >> >> Thanks, >> >> Ethan >> >> On 12/5/2011 12:04 PM, Geoff DiMego wrote: >>> OK that is probably correct and I am jumping the gun. We wanted FWIS to >>> go onto CONDUIT first to get the IMET folks started making the >>> connections to/thru FXNET. This would mean the other 4 fixed location >>> nests would have to come later. I hope I didn't throw anybody under the >>> proverbial bus. >>> >>> That said, I do think what Rich would be able to use most often are Best >>> Time Series from the nests which are fixed and provide guidance out to >>> 60 hours. >>> >>> On 12/5/2011 1:13 PM, Ethan Davis wrote: >>>> Hi Geoff, >>>> >>>> Right. Sorry, I missed that detail and jumped right to FWIS for some >>>> reason. >>>> >>>> We aren't getting the new NAM nest data (4km CONUS, 6km AK, etc.) on >>>> our >>>> server. I checked with Tom Yoksas and he said it isn't on CONDUIT yet. >>>> Linda, do you know the status of that data for CONDUIT? Becky >>>> Cosgrove's >>>> presentation to the User Committee mentions that data on a "Recent >>>> Model >>>> Additions" slide but I don't recall the details. >>>> >>>> Thanks, >>>> >>>> Ethan >>>> >>>> On 12/2/2011 12:37 PM, Geoff DiMego wrote: >>>>> Ethan - thanks for doing the update on NAM documentation. >>>>> >>>>> I think what Rich was asking for are Best Time Series for the fixed >>>>> domain NAM nests, not the FWIS which as you say can be and often >>>>> are in >>>>> different places each run. >>>>> >>>>> On 12/1/2011 4:06 PM, Ethan Davis wrote: >>>>>> Hi Geoff, >>>>>> >>>>>> I've made the documentation changes you requested to the underlying >>>>>> files. I will push them out to our server shortly. >>>>>> >>>>>> The "Best Time Series" aggregation is generated by our FMRC (Forecast >>>>>> Model Run Collection) aggregation. The FMRC takes a time series of >>>>>> runs >>>>>> from a given model and creates several virtual aggregated datasets >>>>>> including a 2 time dimension, 5-D dataset and several datasets with a >>>>>> single time dimension. This AGU poster describes the different single >>>>>> time dimension datasets >>>>>> >>>>>> http://www.unidata.ucar.edu/staff/caron/presentations/FmrcPoster.pdf >>>>>> >>>>>> For all the NCEP model data we serve >>>>>> (http://motherlode.ucar.edu:8080/thredds/idd/models.html ), the >>>>>> underlying data is the GRIB data we get from NOAAPORT and CONDUIT. We >>>>>> read from those data files (for which we have built indexes) to >>>>>> satisfy >>>>>> requests for data from the virtual datasets. >>>>>> >>>>>> Since the spatial domain of the FWIS can change for each run, we >>>>>> won't >>>>>> be able to do a full FMRC aggregation. Each FMRC aggregation expects >>>>>> all >>>>>> the data for each run of the model to be on the same grid. So, we can >>>>>> serve the data from each FWIS run on its own. But we'll have to think >>>>>> about what else it makes sense to do, e.g., "Best Time Series". I'll >>>>>> touch base with Rich and ask what he is trying to do with the >>>>>> data, how >>>>>> he would like to access it. >>>>>> >>>>>> Geoff, can you explain how the location of each FWIS run is >>>>>> determined? >>>>>> Is it an automated process? Or does someone/group decide? Also, are >>>>>> there times when the location stays the same across runs? Is the >>>>>> information on the domain for each run available somewhere besides >>>>>> the >>>>>> grid description in the resulting GRIB files? >>>>>> >>>>>> Thanks, >>>>>> >>>>>> Ethan >>>>>> >>>>>> On 12/1/2011 7:51 AM, Linda Miller wrote: >>>>>>> Hi Geoff, >>>>>>> >>>>>>> Comments inline below. >>>>>>> >>>>>>> On 12/1/2011 7:31 AM, Geoff DiMego wrote: >>>>>>>> Linda; >>>>>>>> >>>>>>>> Hope all is going well for you and yours especially now that the >>>>>>>> hectic holiday season is upon us ^_^ >>>>>>>> >>>>>>>> I hate to be a bother, but I have a favor (yes ANOTHER one!) and a >>>>>>>> question to ask. >>>>>>> No apologies needed >>>>>>>> A USGS user had asked me whether we would be making "Best Time >>>>>>>> Series" >>>>>>>> aggregations for the new NAM nests (4 km CONUS, 6 km Alaska, 3 km >>>>>>>> Hawaii& 3 km Puerto Rico-Hispaniola). I pleaded ignorance. He >>>>>>>> pointed me at >>>>>>>> http://motherlode.ucar.edu:8080/thredds/catalog/fmrc/NCEP/NAM/CONUS_12km/catalog.html?dataset=fmrc/NCEP/NAM/CONUS_12km/NCEP-NAM-CONUS_12km-noaaport_best.ncd >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> which I admit I was unaware of - my bad, but I recognize the >>>>>>>> unique& >>>>>>>> useful aspect of this product which you are constructing. >>>>>>> If you ever get to Boulder, you should plan to visit Unidata. We >>>>>>> could >>>>>>> bring you up to speed with what;s going on here. You might find >>>>>>> some >>>>>>> of the projects of interest to NCEP. >>>>>>> >>>>>>>> The favor is to update the 3rd Summary bullet under >>>>>>>> Documentation to: >>>>>>>> NCEP Nonhydrostatic Multiscale Model on B-grid (NMMB) running in >>>>>>>> the >>>>>>>> NOAA Environmental Modeling System (NEMS) infrastructure, and >>>>>>>> Gridpoint Statistical Interpolation (GSI) analysis. You could also >>>>>>>> add a bullet called NCEP Analysis documentaton / tutorial and >>>>>>>> link it >>>>>>>> to http://www.dtcenter.org/com-GSI/users/tutorials/11_2.php . >>>>>>> I'm sure we can do that. I've cc'd Doug Dirks and Ethan Davis >>>>>>> who can >>>>>>> check it out and make the appropriate edits. >>>>>>> >>>>>>>> My question comes from the one the USGS guy asked: are you >>>>>>>> planning to >>>>>>>> aggregate Best Time Series for the new NAM nests? >>>>>>> I'll bet the "USGS guy" is Rich Signell, who is a liaison to our >>>>>>> Users >>>>>>> Committee. He definitely keeps us on our toes. I'll defer your >>>>>>> question to Ethan. >>>>>>> >>>>>>> Hope your holidays are joyful! >>>>>>> >>>>>>> Linda >>>>>>> -- Ethan Davis UCAR Unidata Program address@hidden http://www.unidata.ucar.edu