Andrea,
The clue is in the NOTES that get issued by Ferret when it reads the
file that fails. The time axis is not monotonic. At the third time
step the time axis the values jumps down and then back up: 730765,
730765.25, 719169.5, 730765.75. It looks like there was an error
creating the file (or specifying the parameters on the axis being
created by GDS from the Gribs or whatever is generating this axis).
The other files which work as you expect them to in Ferret don't have
this problem.
Roland
Some dncdump output follows that shows the first few time values....
C:\Dods\bin>dncdump -c
http://nomads.ncdc.noaa.gov:9090/dods/NWS_SRRS/geohgt1000
netcdf geohgt1000 {
dimensions:
time = 5308 ;
lat = 41 ;
lon = 91 ;
variables:
float hgt1000(time, lat, lon) ;
hgt1000:_FillValue = 9.9990003e+020f ;
hgt1000:missing_value = 9.9990003e+020f ;
hgt1000:long_name = "geopotential height 1000 mb [gpm]
" ;
double time(time) ;
time:units = "days since 1-1-1 00:00:0.0" ;
time:long_name = "Time" ;
time:minimum = "00Z06OCT2001" ;
time:maximum = "18Z24MAY2005" ;
double lat(lat) ;
lat:units = "degrees_north" ;
lat:long_name = "latitude" ;
lat:minimum = 10. ;
lat:maximum = 90. ;
double lon(lon) ;
lon:units = "degrees_east" ;
lon:long_name = "longitude" ;
lon:minimum = -200. ;
lon:maximum = -20. ;
// global attributes:
:title = "SRRS GRIB : 1000 MB HEIGHT ANALYSIS N.AM." ;
:Conventions = "COARDS" ;
:history = "Fri Jun 10 17:00:00 EDT 2005 : imported by
GrADS Dat
a Server 1.2.9" ;
data:
time = 730765, 730765.25, 719169.5, 730765.75, 730766, 730766.25,
730766.5,
Andrea Fey wrote:
I am working on a test LAS which was working for a particular dataset
until recently. The dataset contains four variables which point to the
same time/lat/lon grid. Three of the variables display graphics
correctly, and one returns the following error when you try to get
output:
There are no data available in the range -6.324E+10: to :
The data begin at 0.5:5308.5 and continue to :
Note that the time data contains 5308 steps starting with 10-6-2001.
The log/debug file shows the following differences:
Variable which does not work:
yes? go std_initialize
"http://nomads.ncdc.noaa.gov:9090/dods/NWS_SRRS/geohgt1000"
"1" "1" "hgt1000"
*** NOTE: Coordinates
out of order or missing on axis time at subscript 3
*** NOTE: A dummy
axis of subscripts will be used
yes? set
region/x="-200.0":"-20.0"/y="10.0":"90.0"/k=1/t="01-Jan-2004":"01-Jan-2004"
Variable which works on the same grid:
yes? go std_initialize
"http://nomads.ncdc.noaa.gov:9090/dods/NWS_SRRS/geohgt500"
"1" "1" "hgt500"
yes? set
region/x="-200.0":"-20.0"/y="10.0":"90.0"/k=1/t="01-Jan-2004":"01-Jan-2004"
I don't believe there is anything wrong with the .xml file I've
included in las.xml as I recreated it from scratch to get the same
results.
I have cleared the server/output folder and changed the
Ferret_configure.pl file to use .dodsrc_no_cache, but neither of these
affected the output. We have successfully pulled the data directly from
the GDS server to create graphical output.
Can anyone offer suggestions for other things to try?
Thanks.
Andrea Fey
NOMADS Project Intern
andrea.fey@noaa.gov
828-271-4474
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