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Re: [Meteosatlib-info] Level 1.5 High Rate SEVIRI image data
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From: BasitAli K. <Bas...@ka...> - 2015-05-29 14:22:11
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Hi Effie, Thank you very much for the email and your suggestion and comments on data conversion. As mentioned before i need 8 years of data from 2007 to 2014. I already tried the option to order data online in HRIT or netCDF (my favorite data format) through http in batches but somehow its not working for me. I don't want the whole disk, I only need a box of 30 deg x 30 deg over middle east. However in Data Centre Online Ordering Application, one has to do this spatial subsetting for every granule individually. The temporal resolution of these frames is 15 minutes, so it is not prcatical to do this spatial subsetting for 8 years of data. If i order the whole disk, the data size becomes huge and I had to reduce the batch size significantly. I wonder if there is a way to to takle this problem. I would greatly appreciate any suggestion/work around/comments. Secondly, you mentioned to try getting data in tiff format. I looked at it in the Data Centre Online Ordering Application ->Shopping Trolly. I actually need data from only 3 IR channels that are IR 8.7, IR 10.8 and IR 12.0 , I wonder how can select only these channels in the list of 12 channels, as there seems to be no option for selection of subsetting bands. Thanks for your, I look forward to receive suggestion/comments from you and other meteosat data experts Regards, Bas:) ________________________________ From: effie pav [eff...@ya...] Sent: Thursday, May 28, 2015 4:31 PM To: BasitAli Khan Subject: Re: [Meteosatlib-info] Level 1.5 High Rate SEVIRI image data Hi Bas, a small contribution from my side. HRIT and .nat files are different, so I'm not sure Danielle's suggestion will help you. Indeed the .nat format is tricky, I never figured out how to use it- there is documentation of EUMETSAT to describe exactly the contents, but why don't you order tiff files instead? you may need to order them in batches, sure, but it is so much easier to handle. In some products there is also a GRIB option, but I'm not sure-never used it. HR Seviri L1.5 Image data contain radiances. There is EUMETSAT documentation on the contents of the files and on the conversion to brightness temperatures. It is freely available on their website, if you cannot find it I can forward you the documents. Good luck! Effie On Thursday, 28 May 2015, 11:16, BasitAli Khan <Bas...@ka...> wrote: Dear Daniel, Thank you very much indeed for the response. 2. I'm not sure about the meaning of the ".nat format" . . . . . . . In the data centre online ordering application when you click tab shopping trolley, the first format name under section 'Format Type' is Native. It is unfortunate that even the EUMETSAT do not know what to do with data that comes in this format. I asked them as how can i convert this '.nat' format to any other format, and there response was "We have NO software for the conversion at this moment in time". However, the bulk data comes only in this strange .nat format so i asked them, as how one can read these data if cannot convert it. I was referred to a software tool in the EUMETSAT repository named MSG Native Image Reader http://www.eumetsat.int/website/home/Data/DataDelivery/SupportSoftwareandTo ols/index.html?lang=EN . This small application can only displays the data in .nat format. So one can't actually process it at all. I am now really confused as what to do as this (.nat) format is the only format that EUMETSAT uses to deliver bulk data and there seems to be nobody who knows about this format at all. BTW I believe that "High Rate SEVIRI Level1.5 Image data" product is brightness temperatures. Just wondering if I am right or making some mistaken here. 3. Could you please specify the errors (and/or the output of ./configure)? I am trying to compile meteosatlib on ubuntu 12.04. with gnu 4.6.0 compiler. Following is the result of uname -a 3.13.0-46-generic #75~precise1-Ubuntu SMP Wed Feb 11 19:21:25 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux After unzipping, I first set the compiler variables export CC=gcc export CF=gfortran export CXX=g++ next issued configure command as follows: ./configure --prefix=/path_to_the_dir_where_i_want_to_install_meteosatlib >&myConfig.log& make >&make.log& I am attaching 3 log files 1. config.log ŠŠ system generated log file 2. myConfig.log Š.. i also saved config log 3. make.log log file of make command. Please, have a look. I greatly appreciate your help and suppert in fixing errors in compiling this application Thanks and best regards, bas:) On 5/26/15 3:18 PM, "Daniele Branchini" <dbr...@ar...<mailto:dbr...@ar...>> wrote: >Hi, the actual developer(s) of meteosatlib are almost perpetually busy, >so I'm going to try to answer the question but my knowledge on the >subject is more on the sysadmin side rather than meteorological > >On 22/05/2015 06:50, BasitAli Khan wrote: >> Hi there, >> I am new to satellite data processing for meteorological purposes. Have >> few questions >> 1. I have received Level 1.5 High Rate SEVIRI image data in the >> native ".nat" format. Eumetsat provides bulk data only in this format. >> I am wondering how can I read this and convert it to some more >> conventional data format such as netCDF/HDF or GRIB. My objective is to >> read the data and process dust RGB using three IR channels from MSG2 >> and MSG3 > > > > 2. I wonder if I can use meteosatlib to do this conversion. > >I'm not sure about the meaning of the ".nat format", if we're talking >about HRIT files then the short answer is yes, and meteosatlib comes >with a fancy python script that produces (among other things) dust RGB >images from channels IR_087, IR108 and IR120 > >The long answer: >- you'll need EUMETSAT source code (PublicDecompWT.zip) for the >decompression library (please see >http://sourceforge.net/projects/meteosatlib/files/) >- the python script uses gdal-python: one of the components of >meteosatlib is a gdal driver that enables gdal to understand RIT, SAF >HDF5 and some netCDF satellite dialects > >> 3. Secondly, I was trying to compile meteosatlib on my ubuntu 12.04 with >> gcc 4.6.0. But getting many errors. Do I have to use certain compiler >> flags for gcc on ubuntu? > >Could you please specify the errors (and/or the output of ./configure)? > >> >> 4. Is there any proper discussion forum for meteosatlib users or this >> mailing list is the only source of help? > >The latter. There is also some basic information in the sourceforge wiki >(http://sourceforge.net/p/meteosatlib/wiki/Home/) > >Cheers, > >Daniele > > > >-------------------------------------------------------------------------- >---- >One dashboard for servers and applications across Physical-Virtual-Cloud >Widest out-of-the-box monitoring support with 50+ applications >Performance metrics, stats and reports that give you Actionable Insights >Deep dive visibility with transaction tracing using APM Insight. >http://ad.doubleclick.net/ddm/clk/290420510;117567292;y >_______________________________________________ >Meteosatlib-info mailing list >Met...@li...<mailto:Met...@li...> >https://lists.sourceforge.net/lists/listinfo/meteosatlib-info ________________________________ This message and its contents including attachments are intended solely for the original recipient. 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