[gradsusr] xdfopen via opendap (developed from re Re: sdfopen with opendap file)

[James T. Potemra]

Sorry, yes, SeaWiFS data are restricted access by NASA. Depending on
what you need you can register with the ocean color group at NASA/GSFC
and get the output.

Jim

On 6/20/11 7:29 PM, Namba Takaya wrote:
> Dear Jim
>
> Thank you for your advise.
>
> When I tried to access your SeaWiFS data I am requested to put the
> Nama and Passward like
> To view this page, you must log in to area “iprc_only” on
> apdrc.soest.hawaii.edu:80.
> Do I need to register or is it allowed for certain people?
>
> Best Regards,
> Takaya Namba
>
>
> > Date: Mon, 20 Jun 2011 09:57:48 -1000
> > From: jimp at hawaii.edu
> > To: gradsusr at gradsusr.org
> > Subject: Re: [gradsusr] xdfopen via opendap (developed from re Re:
> sdfopen with opendap file)
> >
> > Takaya:
> >
> > I don't think that the template option works with data via OPeNDAP,
> only on
> > local files. The data provider needs to aggregate the data on the server
> > side
> > of things. Otherwise, you will have to write your script to loop through
> > all the
> > files.
> >! ;
> > You are also welcome to get the Pathfinder SST from our site,
> > http://apdrc.soest.hawaii.edu.
> > The exact URL is:
> >
> >
> http://apdrc.soest.hawaii.edu:80/dods/public_data/satellite_product/AVHRR/avhrr_mon
> >
> > for the monthly values (and these are aggregated).
> >
> > Jim
> >
> > Namba Takaya wrote:
> > > Dear Sir
> > >
> > > I tried to read the HDF file of pathfinder monthly sst via opendap
> > >
> > > Fortunately I could read the sst data by xdfopen and data descriptor
> > > file(bsst.ctl) as bellow,
> > > Then I tried to develop using % of DSET in the data descriptor file.
> > > Then I have a problem explained below and could you tell me how to
> > > solve the problem?
> > >
> > > Best Regards, Takaya Namba
> > >
> > > bsst.ctl (data descriptor file)
> > >
> > > DSET
> > > http://data.nodc.noaa.gov!
> /opendap/pathfinder/Version5.0/Monthly/1985/198501.s04m1pfv50-bsst-16b
> .hdf
> > > options yrev
> > > ***DSET
> > >
> http://data.nodc.noaa.gov/opendap/pathfinder/Version5.0/Monthly/%y4/%y4%m2.s04m1pfv50-bsst-16b.hdf
> > > TITLE This is a sample
> > > UNDEF 99999.0
> > > YDEF lat 4096 LINEAR -90 0.043945
> > > XDEF lon 8192 LINEAR -180 0.043945
> > > ***TDEF time 1 linear 00:00z1! 5JAN1985 1mo
> > > VARS 1:
> > > bsst=>bsst 1 99 surface temperature
> > > ENDVARS
> > >
> > >
> > > However, I would like to use
> > > DSET
> > >
> http://data.nodc.noaa.gov/opendap/pathfinder/Version5.0/Monthly/%y4/%y4%m2.s04m1pfv50-bsst-16b.hdf
> > > instead of
> > > DSET
> > >
> http://data.nodc.noaa.gov/opendap/pathfinder/Version5.0/Monthly/1985/198501.s04m1pfv50-bsst-16b.hdf.
> > > Because I would like to do all the thirty years from jan 1988 to 2009.
> > >
> > > I added the line in the bsst.ctl
> > > TDEF t! ime 1 linear 00:00z15JAN1985 1mo
> > > and then
> > > grads -cl batch-opendap.gs.
> > >
> > > However, the error comes like below,
> > >
> > > Error: nc_open failed to open file
> > >
> http://data.nodc.noaa.gov/opendap/pathfinder/Version5.0/Monthly/%y4/%y4%m2.s04m1pfv50-bsst-16b.hdf
> > > NetCDF: DAP server error
> > > gadsdf: Couldn't i! ngest SDF metadata.
> > > SDF Descriptor file bsst.ctl was not suc cessfully opened & parsed.
> > >
> > > I understand that I could not replace /%y4/%y4%m2 with /1985/198501 by
> > > the data descriptor file.
> > > Could you tell me how can I replace by the proper descriptor file as I
> > > expected?
> > >
> > > (batch-opendap.gs grads script file)
> > > 'set gxout shaded'
> > > 'xdfopen bsst.ctl'
> > > 'q file'
> > > say result
> > > 'set lat 10 50'
> > > 'set lon 120 170'
> &! gt; > 'set T 1'
> > > 'set Z 1'
> > > 'd bsst'
> > ; > 'cbar'
> > > 'quit'
> > >
> > >
> > > dncdump -h
> > >
> "http://data.nodc.noaa.gov/opendap/pathfinder/Version5.0/Monthly/1985/198501.s04m1pfv50-bsst-16b.hdf"
> > >
> > > is as below,
> > >
> > > netcdf 198501.s04m1pfv50-bsst-16b { // format variant: 64bit
> > > dimensions:
> > > lat = 4096 ;
> > > &n! bsp; lon = 8192 ;
> > > variables:
> > > short bsst(lat, lon) ;
> > > bsst:dsp_PixelType = 1b ;
> > > bsst:dsp_PixelSize = 2b ;
> > > bsst:dsp_Flag = 0s ;
> > > bsst:dsp_nBits = 16s ;
> > > bsst:dsp_LineSize = 0 ;
> > > bsst:dsp_cal_name = "Temperature" ;
> > > bsst:units = "Temp" ;
> > > bsst:dsp_cal_eqnNumber = 2s ;
> > > bsst:dsp_cal_CoeffsLeng! th = 8s ;
> > > &n bsp; bsst:dsp_cal_coeffs = 0.075f, -3.f ;
> > > bsst:scale_factor = 0.075f ;
> > > bsst:add_off = -3.f ;
> > >> >
> > >
> > >
> > >
> > >
> ------------------------------------------------------------------------
> > >
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