<div dir="ltr"><div>Hi Geeta,</div><div>I think the attached script may work for this case by manually attaching latitudes and longitudes to the data. See the modified script. Zooming and not zooming does not offset any data using this method, however, it's up to you to make sure that the data displayed is the correct region where it is supposed to be. The script assumes a linear grid for attaching lat/lon. <br></div><div>Also, it helps when people share a minimum/CLEAN script.<br></div><div><br></div><div> Thanks Dennis for sharing the data file offline!</div><div><br></div><div>Cheers,</div><div>Rashed<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Sep 19, 2020 at 1:23 PM Geeta Geeta <<a href="mailto:geetag54@yahoo.com">geetag54@yahoo.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi Mr Rashed. <br>
Kindly tell me if you have seen the data and your thoughts on the problem <br>
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thanks<br>
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Geeta.<br>
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On Friday, 18 September, 2020, 04:01:26 pm IST, Rashed Mahmood <<a href="mailto:rashidcomsis@gmail.com" target="_blank">rashidcomsis@gmail.com</a>> wrote:<br>
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What is the size of the data? Including ncl-talk here, there is a way to upload files, see this: <a href="https://www.ncl.ucar.edu/ftp_files.shtml" rel="noreferrer" target="_blank">https://www.ncl.ucar.edu/ftp_files.shtml</a><br>
Or if not too heavy, you could share it through dropbox or google drive etc.<br>
Cheers,Rashed<br>
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On Fri, Sep 18, 2020 at 6:48 AM Geeta Geeta <<a href="mailto:geetag54@yahoo.com" target="_blank">geetag54@yahoo.com</a>> wrote:<br>
Hi Mr Rashed, \How can I send you the data.<br>
if you share the link I can send the data by ftp or by any other means. Geeta.<br>
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On Friday, 18 September, 2020, 01:48:36 am IST, Rashed Mahmood <<a href="mailto:rashidcomsis@gmail.com" target="_blank">rashidcomsis@gmail.com</a>> wrote:<br>
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Sorry, without a data file it would be impossible for me to see what is going on.<br>
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On Thu, Sep 17, 2020 at 8:35 PM Geeta Geeta <<a href="mailto:geetag54@yahoo.com" target="_blank">geetag54@yahoo.com</a>> wrote:<br>
Thanks Mr Mahmood.<br>
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Data file is big, however I am attaching the script.<br>
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On Thursday, 17 September, 2020, 11:53:16 pm IST, Rashed Mahmood <<a href="mailto:rashidcomsis@gmail.com" target="_blank">rashidcomsis@gmail.com</a>> wrote:<br>
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Hi Geeta,It would be difficult to answer this question without a data file and the script used to plot these figures. Is it possible to share data and the NCL script?Cheers,Rashed<br>
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On Thu, Sep 17, 2020 at 8:05 PM Geeta Geeta via ncl-talk <<a href="mailto:ncl-talk@mailman.ucar.edu" target="_blank">ncl-talk@mailman.ucar.edu</a>> wrote:<br>
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This issue was sorted out a few days ago. Now I am finding a small problem which is the shift of the position of the clouds.<br>
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I mean when I plot the data for regional domain, clouds seem to be shifted by about 2 degree compared to the original domain plot (attachments) .<br>
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Requesting once again to sort out this issue too.<br>
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On Friday, 11 September, 2020, 10:10:16 pm IST, Dennis Shea <<a href="mailto:shea@ucar.edu" target="_blank">shea@ucar.edu</a>> wrote:<br>
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Are the latitude and longitudes on the file?<br>
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1) If "yes", just read as indicated below.2) If "no", the projection information must be used to generate the latitude and longitude information<br>
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The following functions may be useful when the latitudes and longitudes are available<br>
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f = addfile("3DIMG_23JUN2018_0300_L1C_ASIA_MER.h5" , "r")<br>
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glon2d = f->...longitude_variable ...<br>
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latS = 10 ; California [*rough*]<br>
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ji = region_ind (glat2d,glon2d, latS, latN, lonW, lonE)<br>
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x = f->IMG_TIR1(0,jStrt:jLast,iStrt:iLast)<br>
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On Fri, Sep 11, 2020 at 8:41 AM Geeta Geeta via ncl-talk <<a href="mailto:ncl-talk@mailman.ucar.edu" target="_blank">ncl-talk@mailman.ucar.edu</a>> wrote:<br>
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the NxM grid is the larger grid, of the size 55N and 61E.<br>
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will it be minI = 70* 61/(105.5-44.5) ??<br>
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does not seem to be correct, I am not achieving anything<br>
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On Friday, 11 September, 2020, 07:48:54 pm IST, Rick Brownrigg <<a href="mailto:brownrig@ucar.edu" target="_blank">brownrig@ucar.edu</a>> wrote:<br>
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Hi,<br>
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No, not in meters -- you're trying to find the indices of the grid cells that correspond to the corners of your smaller domain. For instance, what are the values i,j that correspond to the corner (-10N,44.5E)<br>
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On Fri, Sep 11, 2020 at 8:11 AM Geeta Geeta <<a href="mailto:geetag54@yahoo.com" target="_blank">geetag54@yahoo.com</a>> wrote:<br>
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Soory Mr Rick. It is not clear to me.<br>
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4 corners of large domain are (-10N,44.5E) , (-10,105.5), (45.5,105.5), (45.5,44.5).<br>
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I want small domain to be 10-20N/70-75E.<br>
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So I have to calculate the X Y (distance in meters)?.<br>
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kindly clarify .<br>
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On Friday, 11 September, 2020, 07:20:57 pm IST, Rick Brownrigg <<a href="mailto:brownrig@ucar.edu" target="_blank">brownrig@ucar.edu</a>> wrote:<br>
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Hi,<br>
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I *think* the trick here is to compute the i,j indices of the grid that correspond to your smaller domain. Since it's a mercator projection, and the original domain is relatively small (60x60 degs), I would think you could get decent results by using a simple linear scaling to find those values. So if the grid is NxM (LatxLon), and you extract the min/max lat/lons from the attributes into variables minLon, maxLon, etc., then something like:<br>
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minI = tointeger( minLonSmallerDomain * (M -0) / (maxLon - minLon) ) ; truncating<br>
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maxI = tointeger( maxLonSmallerDomain * (M -0) / (maxLon - minLon) )...similarly for Y...<br>
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and then:<br>
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Plot(0) = gsn_csm_contour_map(wks,TIR1_INVERTED(0,minJ:maxJ,minI:maxI),rescount)<br>
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and don't forget to substitute appropriate values into the mpLeft/RightCornerLat/LonF resources.<br>
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Does that make sense?<br>
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Rick<br>
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On Fri, Sep 11, 2020 at 4:22 AM Geeta Geeta via ncl-talk <<a href="mailto:ncl-talk@mailman.ucar.edu" target="_blank">ncl-talk@mailman.ucar.edu</a>> wrote:<br>
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Hi.<br>
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I have satellite data which has a resultion of 4 km (TIR1) and there is projection information provided in the datafile.<br>
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integer Projection_Information ( DIM_000 )<br>
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DIMENSION_LIST : <ARRAY of 0 elements><br>
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false_easting : 0<br>
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false_northing : 0<br>
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grid_mapping_name : mercatorpor Brightness Temperaturerature<br>
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longitude_of_projection_origin : 75<br>
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lower_left_lat_lon(degrees) : ( -10, 44.5 )<br>
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lower_right_lat_lon(degrees) : ( -10, 105.5 )<br>
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semi_major_axis : 6378137<br>
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semi_minor_axis : 6356752.3142<br>
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standard_parallel : 17.75<br>
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upper_left_lat_lon(degrees) : ( 45.5, 44.5 )<br>
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upper_left_xy(meters) : ( -3234623.003937, 5401854.420193 )<br>
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upper_right_lat_lon(degrees) : ( 45.5, 105.5 )<br>
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The lat/lon are not provided.<br>
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Plotting the TIR1 (count), radiance and Brightness temperature for the entire domain is happening by using information from the Projection info. This INFO is used from the Line numbers 109-114 of the code.<br>
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My questions are 1. I am Not able to plot the data for a smaller domain of my ineterst<br>
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2. since I am unable to attch the lat/lon arrays to the variables, I am unable to plot the data for a smaller domain and unable to write the data for a smaller domain of my intererst.<br>
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the Images are attached.<br>
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Request someone to help me.<br>
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<br>
Geeta._______________________________________________<br>
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