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Dear IDV developers, the email below got no response from the IDV users list, I hope someone here can help. I'm trying to put ascat swath data in NetCDF in such a way that IDV will open the files and allow scrolling through time, showing the appropriate swath for each time step. I have now ended up with 1 file per swath (reduced to 1 hour of data) following the ghrsst example. See the attached ncdump output for the structure. These files load properly and IDV recognizes the time value! Time scrolling doesn't work: after loading multiple files, IDV (5.0) always shows all swaths, independent of what time value is selected in the time slider. I've added time bounds to no effect. I tried using a master time driver from a different dataset to no effect. Is this a bug in IDV? Can anyone tell me if this can be made to work the way I intend? Example files are at http://freja.argoss.nl/file-exchange/ascat_bmta_20140715_00.nc http://freja.argoss.nl/file-exchange/ascat_bmta_20140715_01.nc http://freja.argoss.nl/file-exchange/ascat_bmta_20140715_02.nc http://freja.argoss.nl/file-exchange/ascat_bmta_20140715_03.nc To reproduce, load each one (make a wind barb plan view or a color shaded plan view) and try to scroll through time. Thanks for your help, Kind regards Hein Zelle ----- Forwarded message from Hein Zelle <hein.zelle@xxxxxxxxxxxxx> ----- Date: Thu, 26 Jun 2014 17:17:14 +0200 From: Hein Zelle <hein.zelle@xxxxxxxxxxxxx> To: IDV users list <idvusers@xxxxxxxxxxxxxxxx> Subject: ascat data in netcdf in IDV Dear IDV users, I'm at it again - struggling with netcdf file formats that will work in IDV. Any pointers will be appreciated! I would like to put ascat data (a left and right swath of data) in netcdf in such a way that IDV will - visualize the data as a colour shaded plan view - skip trough time per orbit or per hour The attached file dump (testout2.dump) almost works: I concatenate all orbits onto a record (time) axis and use attributes to get IDV to understand time. IDV loads the file, shows the data variables and it shows the time values but it won't plot anything (value plot nor color shaded). No error, just no plot. (IDV version 3.1u1) Can anyone spot what's wrong with testout2.dump? The file is at http://freja.argoss.nl/file-exchange/testout2.nc Even better, does anyone have a working example of a file containing satellite orbits with swaths? Some observations: - the record axis cannot be called 'time', IDV doesn't read the file. - I don't know what's the proper featureType for this file, I can't find a relevant example in the CF conventions. - I tried adding a third dimension (hourly time axis) with a separate record axis, but I couldn't get that to load in IDV at all. Thanks for your help, Kind regards Hein -- Dr. Hein Zelle Senior consultant meteorology & oceanography BMT ARGOSS Tel: +31 (0)527-242299 Fax: +31 (0)527-242016 E-mail: hein.zelle@xxxxxxxxxxxxx Website: www.bmtargoss.com BMT ARGOSS b.v. Voorsterweg 28, 8316 PT Marknesse, the Netherlands Postal address: P.O. Box 61, 8325 ZH Vollenhove, the Netherlands Registered in The Netherlands, Registered no. 39060160. Unless otherwise agreed by BMT ARGOSS in writing, all work, services, goods or products supplied by BMT ARGOSS shall be subject to and governed by BMT ARGOSS' own terms and conditions which are available for inspection from BMT ARGOSS on request. E-mail confidentiality notice and disclaimer: The contents of this e-mail and any attachments are intended for the use of the mail addressee(s) shown. If you are not that person, you are not allowed to read it, to take any action based upon it or to copy it, forward, distribute or disclose the contents of it and you should please delete it from your system. BMT ARGOSS does not accept liability for any errors or omissions in the context of this e-mail or its attachments which arise as a result of internet transmission, nor accept liability for statements which are those of the author and clearly not made on behalf of BMT ARGOSS. netcdf testout2 { dimensions: record = UNLIMITED ; // (1632 currently) x = 44 ; variables: double x(x) ; double record(record) ; double time(record) ; time:_FillValue = -3.3e+33 ; time:units = "days since 1970-01-01 00:00:00" ; time:standard_name = "time" ; time:calendar = "standard" ; float longitude(record, x) ; longitude:_FillValue = -3.3e+33f ; longitude:units = "degrees_east" ; longitude:standard_name = "longitude" ; float latitude(record, x) ; latitude:_FillValue = -3.3e+33f ; latitude:units = "degrees_north" ; latitude:standard_name = "latitude" ; float wind_speed(record, x) ; wind_speed:_FillValue = -3.3e+33f ; wind_speed:units = "m/s" ; wind_speed:standard_name = "wind_speed" ; wind_speed:coordinates = "time latitude longitude" ; float zonal_wind_speed(record, x) ; zonal_wind_speed:_FillValue = -3.3e+33f ; zonal_wind_speed:units = "m/s" ; zonal_wind_speed:standard_name = "eastward_wind" ; zonal_wind_speed:coordinates = "time latitude longitude" ; float meridional_wind_speed(record, x) ; meridional_wind_speed:_FillValue = -3.3e+33f ; meridional_wind_speed:units = "m/s" ; meridional_wind_speed:standard_name = "northward_wind" ; meridional_wind_speed:coordinates = "time latitude longitude" ; // global attributes: :title = "MetOp-A ASCAT 25.0 km Ocean Surface Winds" ; :Conventions = "CF-1.6" ; :featureType = "trajectory" ; } ----- End forwarded message ----- -- Dr. Hein Zelle Senior consultant meteorology & oceanography BMT ARGOSS Tel: +31 (0)527-242299 Fax: +31 (0)527-242016 E-mail: hein.zelle@xxxxxxxxxxxxx Website: www.bmtargoss.com BMT ARGOSS b.v. Voorsterweg 28, 8316 PT Marknesse, the Netherlands Postal address: P.O. Box 61, 8325 ZH Vollenhove, the Netherlands Registered in The Netherlands, Registered no. 39060160. Unless otherwise agreed by BMT ARGOSS in writing, all work, services, goods or products supplied by BMT ARGOSS shall be subject to and governed by BMT ARGOSS' own terms and conditions which are available for inspection from BMT ARGOSS on request. E-mail confidentiality notice and disclaimer: The contents of this e-mail and any attachments are intended for the use of the mail addressee(s) shown. If you are not that person, you are not allowed to read it, to take any action based upon it or to copy it, forward, distribute or disclose the contents of it and you should please delete it from your system. BMT ARGOSS does not accept liability for any errors or omissions in the context of this e-mail or its attachments which arise as a result of internet transmission, nor accept liability for statements which are those of the author and clearly not made on behalf of BMT ARGOSS.
netcdf ascat_bmta_20140715_00 {
dimensions:
time = UNLIMITED ; // (1 currently)
y = 961 ;
x = 44 ;
bnds = 2 ;
variables:
double time(time) ;
time:_FillValue = -3.3e+33 ;
time:units = "days since 1970-01-01 00:00" ;
time:standard_name = "time" ;
time:calendar = "standard" ;
time:bounds = "time_bnds" ;
double time_bnds(time, bnds) ;
time_bnds:_FillValue = -3.3e+33 ;
time_bnds:units = "days since 1970-01-01 00:00" ;
time_bnds:standard_name = "time" ;
float longitude(y, x) ;
longitude:_FillValue = -3.3e+33f ;
longitude:units = "degrees_east" ;
longitude:standard_name = "longitude" ;
longitude:valid_min = -180. ;
longitude:valid_max = 180. ;
float latitude(y, x) ;
latitude:_FillValue = -3.3e+33f ;
latitude:units = "degrees_north" ;
latitude:standard_name = "latitude" ;
latitude:valid_min = -90. ;
latitude:valid_max = 90. ;
float wind_speed(time, y, x) ;
wind_speed:_FillValue = -3.3e+33f ;
wind_speed:units = "m/s" ;
wind_speed:standard_name = "wind_speed" ;
wind_speed:coordinates = "latitude longitude" ;
float zonal_wind_speed(time, y, x) ;
zonal_wind_speed:_FillValue = -3.3e+33f ;
zonal_wind_speed:units = "m/s" ;
zonal_wind_speed:standard_name = "eastward_wind" ;
zonal_wind_speed:coordinates = "latitude longitude" ;
float meridional_wind_speed(time, y, x) ;
meridional_wind_speed:_FillValue = -3.3e+33f ;
meridional_wind_speed:units = "m/s" ;
meridional_wind_speed:standard_name = "northward_wind" ;
meridional_wind_speed:coordinates = "latitude longitude" ;
// global attributes:
:title = "MetOp-A ASCAT 25.0 km Ocean Surface Winds" ;
:Conventions = "CF-1.6" ;
:cdm_data_type = "swath" ;
}
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