Hi John,
There's definitely something strange going on here. I tried to open this file using an interactive NCL session and simply typing:
ncl 0> a = addfile("http://tds.maracoos.org/thredds/dodsC/SST-Agg.nc","r")
It first gave me this message:
syntax error, unexpected WORD_WORD, expecting SCAN_ATTR or SCAN_DATASET or SCAN_ERROR
context: <!DOCTYPE^ HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><html><head><title>503 Service Temporarily Unavailable</title></head><body><h1>Service Temporarily Unavailable</h1><p>The server is temporarily unable to service yourrequest due to maintenance downtime or capacityproblems. Please try again later.</p><hr><address>Apache/2.2.16 (Amazon) Server at tds.maracoos.org Port 80</address></body></html>
fatal:NetCDF: Malformed or inaccessible DAP DDS
fatal:Could not open (http://tds.maracoos.org/thredds/dodsC/SST-Agg.nc)
I then tried again, from a new ncl interactive session:
ncl 0> a = addfile("http://tds.maracoos.org/thredds/dodsC/SST-Agg.nc","r")
ncl 1> print(a)
Variable: a
Type: file
filename: SST-Agg
path: http://tds.maracoos.org/thredds/dodsC/SST-Agg.nc
file global attributes:
Conventions : CF-1.0
creator_name : Matthew Oliver and Danielle Haulsee
creator_email : moliver@udel.edu and dhaulsee@udel.edu
institution : University of Delaware Ocean Remote Sensing and Biogeography Group (ORB) and Rutgers University Coastal Ocean Observation Laboratory (RU-COOL)
url : http://www.ceoe.udel.edu, http://marine.rutgers.edu/cool/sat_data
source : satellite radiometer observation NOAA/POES AVHRR instrument
groundstation : RU-COOL L-band receiver at Rutgers University, New Jersey, USA
summary : MCSST calculation and image navigation by TeraScan software; Regridded to Mercator lon/lat projection. Processed and De-clouded at University of Delaware
history :
dimensions:
lat = 3661
lon = 4500
time = 20776
variables:
double lon ( lon )
long_name : Longitude
units : degrees_east
double lat ( lat )
long_name : Latitude
units : degrees_north
integer sat ( time )
units : NULL
_FillValue : -999
long_name : Satellite
missing_value : -999
. . .
Can you please try this a couple of times in a row, and let me know if you still see problems.
Also, I believe Dennis asked you offline if you had an OPeNDAP enabled version of NCL.
--Mary
On Jul 24, 2012, at 6:29 AM, John Kerfoot wrote:
> I can't seem to read 64-bit offset NetCDF files using ncl 6.1.0-beta.
> Here's an example:
>
> arctic: bin > ~/production/bin/bash/nclRead.sh
> http://tds.maracoos.org/thredds/dodsC/SST-Agg.nc
>
> Copyright (C) 1995-2012 - All Rights Reserved
> University Corporation for Atmospheric Research
> NCAR Command Language Version 6.1.0-beta
> The use of this software is governed by a License Agreement.
> See http://www.ncl.ucar.edu/ for more details.
> (0) Checking File: http://tds.maracoos.org/thredds/dodsC/SST-Agg.nc
> fatal:NetCDF: Unknown file format
> fatal:Could not open (http://tds.maracoos.org/thredds/dodsC/SST-Agg.nc)
>
> Variable: fid
> Type: file
> (0) File Missing Value : -1
>
> When I run ncdump on the url, I get the following:
>
> arctic: bin > ncdump -k http://tds.maracoos.org/thredds/dodsC/SST-Agg.nc
> 64-bit offset
>
> But if I do the same thing using ncl 6.0, it works:
>
> arctic: bash > ~/production/bin/bash/nclRead.sh
> http://tds.maracoos.org/thredds/dodsC/SST-Agg.nc
> command: /opt/ncl_ncarg-6.0.0.0/bin/ncl
> ncFile="http://tds.maracoos.org/thredds/dodsC/SST-Agg.nc"
> Copyright (C) 1995-2011 - All Rights Reserved
> University Corporation for Atmospheric Research
> NCAR Command Language Version 6.0.0
> The use of this software is governed by a License Agreement.
> See http://www.ncl.ucar.edu/ for more details.
> (0) Checking File: http://tds.maracoos.org/thredds/dodsC/SST-Agg.nc
>
> Variable: fid
> Type: file
> File path: http://tds.maracoos.org/thredds/dodsC/SST-Agg.nc
> Number of global attributes: 9
> Number of dimensions: 3
> Number of variables: 6
>
> Here's the info on my linux distro:
>
> arctic: bash > uname -a
> Linux arctic 2.6.32-279.1.1.el6.centos.plus.x86_64 #1 SMP Tue Jul 10
> 17:38:35 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
>
> Any help greatly appreciated.
>
> John
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Received on Tue Jul 24 07:40:50 2012
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