To: address@hidden From: "Greg Bensen" <address@hidden> Subject: IDV - flight tracks Organization: UNAVCO Keywords: 200501031857.j03IvgL6006134
Hi Greg-
Institution: UNAVCO Package Version: 1.2b1 and 1.1 Operating System: Windows XP Hardware Information: dell P4 3.0 GHz 1.0 Gb ram Inquiry: Hello,I would like to create a netCDF file in the flight track format for following seismic waves through the earth (ray tracing). I think all I would need is a sample flight track file. Is this something you could send me/point me to? thanks.
At this point, you'd need a file that is dimensioned on time with
lat/lon/alt at each point. You can add more variables as needed.
It would look something like:
netcdf WMI_Lear-2003-05-28-212817 {
dimensions:
time = UNLIMITED ; // (588 currently)
variables:
double time(time) ;
time:units = "seconds since 1970-1-1 0:00:00 0:00" ;
time:long_name = "time" ;
time:_FillValue = -99999. ;
time:missing_value = -99999. ;
float altitude(time) ;
altitude:units = "km" ;
altitude:long_name = "altitude MSL" ;
altitude:_FillValue = -99999.f ;
altitude:missing_value = -99999.f ;
float latitude(time) ;
latitude:units = "degrees_N" ;
latitude:long_name = "latitude" ;
latitude:_FillValue = -99999.f ;
latitude:missing_value = -99999.f ;
latitude:valid_range = -90.f, 90.f ;
float longitude(time) ;
longitude:units = "degrees_E" ;
longitude:long_name = "longitude" ;
longitude:_FillValue = -99999.f ;
longitude:missing_value = -99999.f ;
longitude:valid_range = -180.f, 180.f ;
float pressure(time) ;
pressure:units = "hPa" ;
pressure:long_name = "pressure" ;
pressure:field_type = "P" ;
pressure:_FillValue = -99999.f ;
pressure:missing_value = -99999.f ;
float tdry(time) ;
tdry:units = "deg_C" ;
tdry:long_name = "temperature" ;
tdry:field_type = "T" ;
tdry:_FillValue = -99999.f ;
tdry:missing_value = -99999.f ;
.....
We will eventually make changes to support multiple tracks in
one file (format yet TBD), but for now you need a separate
file for each track.
A sample file is attached.
Don Murray
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Attachment:
WMI_Lear-2003-05-28-212817.nc
Description: Binary data