Hi again, The embedded NcML is a bit hard to read so attached, you will find that same NcML file. Best, Unidata IDV Support > Hi Alexa, > > It is a little tricky but you can fix these problems with a bit of > NcML. To get us going, let's look at the following NcML which can be > read into the IDV and will allow you to view the > `channel_14_brightness_temperature' over time. This file should be > located next to your `hdf' files. Please read the comments in the NcML > for more information about what is going on here. > > ,---- > | <?xml version="1.0" encoding="UTF-8"?> > | <netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2";> > | <!-- Create a time coordinate variable that will be used for the > aggregation. --> > | <variable name="time" type="int" shape="time" > > | <!-- Let's add some units. Alexa: please make sure these units are > correct. --> > | <attribute name="units" value="minutes since 2014-04-04 19:09"/> > | <!-- Specify this variable as a time coordinate --> > | <attribute name="_CoordinateAxisType" value="Time" /> > | <!-- Increment each file listed below by 10 minutes. Alexa, please make > sure this --> > | <!-- assumption about the times is correct. --> > | <values start="0" increment="10" /> > | </variable> > | <!-- Specify the coordinates of time lat lon for this one variable. > Please use --> > | <!-- this as an example for other variables you are interersted in. In > other --> > | <!-- words, you can copy and paste this variable NcML element for your > other --> > | <!-- variables. --> > | <variable name="channel_14_brightness_temperature" shape="lines elements" > type="short"> > | <attribute name="coordinates" value="time pixel_latitude > pixel_longitude" /> > | </variable> > | <!-- Now you are ready to do your aggregation, which is the easy part at > this point --> > | <aggregation dimName="time" type="joinNew"> > | <variableAgg name="T"/> > | <netcdf location="geocatL1.MTSAT-1R.2014044.190900.hdf"/> > | <netcdf location="geocatL1.MTSAT-1R.2014044.191900.hdf"/> > | </aggregation> > | </netcdf> > `---- > > In summary, this NcML should aggregate over time the two of HDF files > you provided. You will see only one variable that is aggregated over > time; `channel_14_brightness_temperature'. I'll leave it up to you to > do the others though do not hesitate to ask for help. > > Also, if interested, there are also fancier tricks we can do here such > as NcML can be smart enough to extract the times from the file names. > > Best, > > Unidata IDV Support > > > Ok sounds promising. Here is the link to another file, which should differ > > only in time — > > https://drive.google.com/file/d/0B1jVlP9ZfAZCRDVyczU3N2NMbFU/view?usp=sharing > > -Alexa > > > > > On Mar 30, 2016, at 4:49 PM, Unidata IDV Support <address@hidden> wrote: > > > > > > Alexa, > > > > > > Indeed we may be able to patch things up with a bit of ncml. I only found > > > one > > > file at the drive.google location. Would it be possible to see more so > > > that we > > > have something to aggregate? > > > > > > Best, > > > > > > Unidata IDV Support > > > > > >> Hello IDV Support, > > >> > > >> I am working on reading in a number of HDF files using ‘aggregate grids > > >> by time’ or similar. I am able to read the files in individually without > > >> a problem, but it looks like the time variable is not recognized. The > > >> error message is "Grid data source failed making data set….Dimension > > >> time does not exist”. Any ideas for how to specify the time variable? > > >> Could this be achieved with an .ncml script? > > >> > > >> Example file is located here: > > >> https://drive.google.com/file/d/0B1jVlP9ZfAZCRFhkRVM2aVVRVGc/view?usp=sharing > > >> > > >> All the best > > >> > > >> Alexa > > >> > > > > > > > > > Ticket Details > > > =================== > > > Ticket ID: LPW-471935 > > > Department: Support IDV > > > Priority: Normal > > > Status: Closed > > > > > > > > Ticket Details =================== Ticket ID: LPW-471935 Department: Support IDV Priority: Normal Status: Closed
Attachment:
alexa.ncml
Description: Binary data