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[IDV #VRB-317344]: Conversion of infrared data to temperature



Greetings Ben,

I downloaded McV and could not get it to run on my system either (OSX 10.7.4, 
Java 1.6.0_31). When I try to run from the command line, I get errors like this:

May 17 08:28:06 micromac java[5507] <Error>: CGContextGetCTM: invalid context 
0x0
May 17 08:28:06 micromac java[5507] <Error>: CGContextSetBaseCTM: invalid 
context 0x0

and McV freezes at the "Loading Defaults" screen. When I run the IDV, I get the 
same kinds of errors on the command line, but it still starts up...except the 
Display screen is missing! I'm getting Java3D errors, which is preventing the 
IDV display from popping up. After digging around a bit, it seems as though a 
recent Mac update has 'killed' Java3D applications (it's a bigger problem than 
the IDV or McV). I'm still digging around to see if there is a solution to this.

Sean

> Hi Sean,
> 
> I'm running 1.6.0.29
> 
> I have an ADDE account with SSEC now, but can't seem to get IDV to talk that 
> account when I tried it a few times yesterday.  Figured that I'm doing 
> something wrong... never tried this approach before.
> 
> Do you think that I should re-install McV or might Java be the issue?
> 
> Thanks again,
> 
> Ben
> 
> On May 17, 2012, at 6:49 AM, Unidata IDV Support wrote:
> 
> > Hi Ben,
> >
> > Which version of Java are you using (from the command line: java -version)? 
> > Also, McV is pretty much IDV with some additions, so if IDV runs, than McV 
> > should run.
> >
> > The reason I suggest McV is because it comes bundled with the ADDE server, 
> > which does the calculations on the raw files to convert them into things 
> > like IR brightness temperatures. When you access satellite data through the 
> > IDV satellite chooser, you connect to a remote ADDE server. Then, when you 
> > select a product to view, the ADDE server will do the necessary 
> > calculations before sending you the data to view. When reading the raw data 
> > off of disk, you need a local ADDE server to active the same functionality, 
> > which is why McV bundles the ADDE server. I think page two of this pdf 
> > explains how to do this in McV:
> >
> > http://www.ssec.wisc.edu/mcidas/software/v/docs/SatelliteImagery1.01.pdf
> >
> > Cheers!
> >
> > Sean
> >
> >> Hi Sean,
> >>
> >> When I go to run McV, it launches then freezes every time.  I had a fairly 
> >> old version on this machine, so I downloaded the latest version and it 
> >> does exactly the same thing.  Perhaps uninstalling McV and reinstalling 
> >> from scratch would help?
> >>
> >> Why do you feed that McV is the way to go for this case?
> >>
> >> Thanks,
> >>
> >> Ben
> >>
> >> On May 16, 2012, at 4:54 PM, Unidata IDV Support wrote:
> >>
> >>> Greetings Ben,
> >>>
> >>> McV is the way to go for this case. What kind of issues were you having 
> >>> getting McV to run? I ask because many of the machines at SSEC are Macs 
> >>> running Snow Leopard, so it's odd that it won't work for you.
> >>>
> >>> Cheers,
> >>>
> >>> Sean
> >>>
> >>>> Hello,
> >>>>
> >>>> I have downloaded some GOES-13 imager AREA files from NCDC's CLASS site,
> >>>> trying to get a look at the visible and especially the IR images for a
> >>>> couple of days in November 2010.
> >>>>
> >>>> Using the IDV, I am able to read and plot these fields, but the data
> >>>> are raw.  I can deal with this for vis imagery because it's still 
> >>>> possible
> >>>> to look at the images and get a feel for how bright they are.  However,
> >>>> I want to try to view the actual temperatures from the long-wave IR and
> >>>> don't know how to do that when all I have are the raw value for channel 
> >>>> 4.
> >>>>
> >>>> NOAA's website
> >>>>
> >>>> http://www.oso.noaa.gov/goes/goes-calibration/gvar-conversion.htm
> >>>>
> >>>> provides equations for converting the raw values to temperatures, but
> >>>> how can I apply such equations in IDV so that I can calculate/convert
> >>>> from the raw ch-4 values to temperatures then display them?
> >>>>
> >>>> If an alternative data source or method of plotting would be a better
> >>>> choice than the CLASS/IDV combination that I've chose, please let me 
> >>>> know.
> >>>> As a backup, I tried to use McIDAS-V for this task, but can't even get
> >>>> the software to run on my machine (Mac OSX10.6.8).
> >>>>
> >>>> Perhaps GINI data could work?  I haven't been able to find a good archive
> >>>> of that, though.
> >>>>
> >>>> Any help would be appreciated.
> >>>>
> >>>> Many thanks,
> >>>>
> >>>> Ben Bernstein
> >>>>
> >>>
> >>>
> >>> Ticket Details
> >>> ===================
> >>> Ticket ID: VRB-317344
> >>> Department: Support IDV
> >>> Priority: Normal
> >>> Status: Open
> >>>
> >>
> >>
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: VRB-317344
> > Department: Support IDV
> > Priority: Normal
> > Status: Open
> >
> 
> 


Ticket Details
===================
Ticket ID: VRB-317344
Department: Support IDV
Priority: Normal
Status: Open


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