<div dir="ltr"><div>I speculate that IDL's 'read_binary' reads files created by IDL's 'write_binary'.<br><br></div>I think this is a special IDL data structure.<br><br><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Mar 29, 2017 at 5:03 PM, Debasish Hazra <span dir="ltr"><<a href="mailto:debasish.hazra5@gmail.com" target="_blank">debasish.hazra5@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Thanks Mary for looking in to it. I have find only one IDL file that read that data set and it is attahced.</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>Debasish.</div></font></span></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Mar 29, 2017 at 5:28 PM, Mary Haley <span dir="ltr"><<a href="mailto:haley@ucar.edu" target="_blank">haley@ucar.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-size:small">Hi Debasish,</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Kevin and I took a look at this. For starters, there *is* an error message coming out of your script:</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default"><div class="gmail_default" style="font-size:small"><font face="monospace, monospace">warning:cbinread: The size implied by the dimension arrays is greater that the size of the file.</font></div><div class="gmail_default" style="font-size:small"><font face="monospace, monospace"> The default _FillValue for the specified type will be filled in.</font></div><div class="gmail_default" style="font-size:small"><font face="monospace, monospace"> Note dimensions and values may not be aligned properly</font></div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">If you look at the size of the file, it doesn't match with the dimensions you're requesting:</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Size of file = 8294400 bytes</div><br>Size of dimensions = 5 * 720 * 1440 * 4 (for a uint) = 20736000</div><div class="gmail_default"><br></div><div class="gmail_default">If this is truly a C binary file, it looks like it only has 2 * 720 * 1440 * 4 bytes.</div><div class="gmail_default"><br></div><div class="gmail_default">This doesn't really change the results, however, because you still get two strange looking plots.</div><div class="gmail_default"><br></div><div class="gmail_default">We tried several different things:</div><div class="gmail_default"><br></div><div class="gmail_default">1) reading the data as ubyte, int, and ushort</div><div class="gmail_default">2) reversing the array to 1440 x 720 x 2</div><div class="gmail_default">3) reading the data as little endian</div><div class="gmail_default">4) plotting the data as a simple contour plot to take out the map component.</div><div class="gmail_default"><br></div><div class="gmail_default">Nothing we did produced more information about the file, or produced better plots.</div><div class="gmail_default"><br></div><div class="gmail_default">Is there some documentation on this file to understand how it was written? For example, are you sure the "uint" type is correct? Are you sure the dimension sizes are correct? Why are the values so large? Is it possible that this is "packed" data, and that you need to use a function like dim_gbits to pick off individual bits of information?</div><div class="gmail_default"><br></div><div class="gmail_default">If you can find a C or Fortran code that was used to create this file, then it should be fairly straightforward to figure out how to read it.</div><div class="gmail_default"><br></div><div class="gmail_default">--Mary</div><div class="gmail_default"><br></div><div class="gmail_default"><br></div><div class="gmail_default"><br></div><div class="gmail_default"><br></div><div class="gmail_default"><br></div></div><div class="gmail_extra"><br><div class="gmail_quote"><span>On Wed, Mar 29, 2017 at 2:18 PM, Debasish Hazra <span dir="ltr"><<a href="mailto:debasish.hazra5@gmail.com" target="_blank">debasish.hazra5@gmail.com</a>></span> wrote:<br></span><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><span><div dir="ltr"><div>Hi,</div><div><br></div><div><div>I am trying to read a binary file with the attached code, but getting all empty fields in the figure with no apparent error message. Uploaded the data file in the ftp server "viirs_meandbdi_gridded_statis<wbr>2015048.dat". Any help with this is appreciated.</div><div><br></div><div>Thanks.</div><span class="m_6953690311967160673m_-5323660611070675753HOEnZb"><font color="#888888"><div>Debasish</div></font></span></div></div><div class="m_6953690311967160673m_-5323660611070675753HOEnZb"><div class="m_6953690311967160673m_-5323660611070675753h5"><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Mar 22, 2017 at 10:33 AM, Debasish Hazra <span dir="ltr"><<a href="mailto:debasish.hazra5@gmail.com" target="_blank">debasish.hazra5@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="ltr"><div>Hi,</div><div><br></div><div>I am trying to read a binary file with the attached code, but getting all empty fields in the figure with no apparent error message. Uploaded the data file in the ftp server "viirs_meandbdi_gridded_statis<wbr>2015002.dat". Any help with this is appreciated.</div><div><br></div><div>Thanks.</div><span class="m_6953690311967160673m_-5323660611070675753m_3158856751608814800HOEnZb"><font color="#888888"><div>Debasish.</div><div><br></div><div><br></div></font></span></div>
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