<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">The question is general and involve different steps. There are a lot of examples on the NCL website, you should first try following those.<div class=""><br class=""></div><div class="">Specifically,</div><div class=""><br class=""></div><div class="">[1] reading HDF data (<a href="https://www.ncl.ucar.edu/Applications/HDF.shtml" class="">https://www.ncl.ucar.edu/Applications/HDF.shtml</a>) possibly concatenating them (<a href="https://www.ncl.ucar.edu/Applications/addfiles.shtml" class="">https://www.ncl.ucar.edu/Applications/addfiles.shtml</a>) so you already have all the timesteps. Otherwise you'd have to loop over the file and then concatenate the variable afterwards (<a href="https://www.ncl.ucar.edu/Document/Functions/Contributed/array_append_record.shtml" class="">https://www.ncl.ucar.edu/Document/Functions/Contributed/array_append_record.shtml</a>).</div><div class=""><br class=""></div><div class="">[2] extract a lat-lon point from the variable that you're reading. var_point=var({lat_point},{lon_point}) assuming that the variable has coordinate variables attached (<a href="https://www.ncl.ucar.edu/Document/Language/subscript_coord.shtml" class="">https://www.ncl.ucar.edu/Document/Language/subscript_coord.shtml</a>), otherwise you have to find the cell index by yourself (some hint <a href="https://www.ncl.ucar.edu/Document/Functions/Built-in/ind.shtml" class="">https://www.ncl.ucar.edu/Document/Functions/Built-in/ind.shtml</a>). You should also develop an if-condition that checks whether the point is included in the swath: I believe that your satellite data is sparse so maybe the point that you're looking at is not always included in the swath... I would suggest to assign a _FillValue to the variable if this point is not found so that you can plot the timeseries easily. </div><div class=""><br class=""></div><div class="">[3] Do a timeseries with gsm_csm_xy, mabye format the x-axis using time_axis_labels (<a href="https://www.ncl.ucar.edu/Document/Functions/User_contributed/time_axis_labels.shtml" class="">https://www.ncl.ucar.edu/Document/Functions/User_contributed/time_axis_labels.shtml</a>).</div><div class=""><br class=""></div><div class="">I believe you have enough to start working now. </div><div class=""><br class=""></div><div class="">Cheers </div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 26. Feb 2018, at 15:51, Krishnakumar AP <<a href="mailto:krishnaap7@gmail.com" class="">krishnaap7@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="">Hello NCL Community,<br class=""></div> I want to make a time series plot from HDF satellite swaths of multiple days, how to do that? I want to take time series values of Cloud water path from a specific lat and long and make into a time series plot. Could you please guide me? Thanks in advance<br clear="all" class=""><div class=""><div class=""><div class=""><br class="">-- <br class=""><div class="m_-4016235376563004661gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><br class=""></div><div class="">Thankfully<br class="">Krishnakumar.AP<br class=""> </div></div></div></div></div>
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