NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
>From: "Qun Miao" <address@hidden> >Organization: University of Wyoming >Keywords: 200511111828.jABISs7s019837 IDV flight track Hi- >I am wondering if there is a way to overlay a flight track on a radar = >image in IDV. If the answer is yes, that'll be great and I have the = >following question about track files. > >I tried to create a NetCDF file as a track file. It's like this, > >netcdf test1 { >dimensions: > time = 3 ; >variables: > double time(time) ; > time:long_name = "Time" ; > time:unit = "sec" ; > float altitude(time) ; > altitude:long_name = "Altitude" ; > altitude:unit = "meter" ; > float latitude(time) ; > latitude:long_name = "Latitude" ; > latitude:unit = "degree north" ; > float longitude(time) ; > longitude:long_name = "Longitude" ; > longitude:unit = "degree east" ; >}. > >But IDV can't load it as a track file. The problem is that the unit specifications are not correct for this file. The correct attribute should be "units" instead of "unit" and they value should either be just "degrees" or "degrees_north" and "degrees_east" for latitude and longitude respectively. >Looking forward to your response. And thanks in advance. I also suggest that you specify something like "seconds since 2004-06-21 00:00:00 00:00" (use whatever time the flight started) for time. If you just have seconds, it will take it as seconds since 1970-01-01 00:00:00. Don Murray NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.