1 | !********************************************************************** |
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2 | ! Copyright 1998,1999,2000,2001,2002,2005,2007,2008,2009,2010 * |
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3 | ! Andreas Stohl, Petra Seibert, A. Frank, Gerhard Wotawa, * |
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4 | ! Caroline Forster, Sabine Eckhardt, John Burkhart, Harald Sodemann * |
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5 | ! * |
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6 | ! This file is part of FLEXPART. * |
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7 | ! * |
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8 | ! FLEXPART is free software: you can redistribute it and/or modify * |
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9 | ! it under the terms of the GNU General Public License as published by* |
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10 | ! the Free Software Foundation, either version 3 of the License, or * |
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11 | ! (at your option) any later version. * |
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12 | ! * |
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13 | ! FLEXPART is distributed in the hope that it will be useful, * |
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14 | ! but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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15 | ! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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16 | ! GNU General Public License for more details. * |
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17 | ! * |
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18 | ! You should have received a copy of the GNU General Public License * |
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19 | ! along with FLEXPART. If not, see <http://www.gnu.org/licenses/>. * |
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20 | !********************************************************************** |
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21 | |
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22 | function juldate(yyyymmdd,hhmiss) |
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23 | |
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24 | !***************************************************************************** |
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25 | ! * |
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26 | ! Calculates the Julian date * |
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27 | ! * |
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28 | ! AUTHOR: Andreas Stohl (15 October 1993) * |
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29 | ! * |
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30 | ! Variables: * |
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31 | ! dd Day * |
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32 | ! hh Hour * |
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33 | ! hhmiss Hour, minute + second * |
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34 | ! ja,jm,jy help variables * |
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35 | ! juldate Julian Date * |
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36 | ! julday help variable * |
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37 | ! mi Minute * |
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38 | ! mm Month * |
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39 | ! ss Second * |
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40 | ! yyyy Year * |
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41 | ! yyyymmddhh Date and Time * |
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42 | ! * |
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43 | ! Constants: * |
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44 | ! igreg help constant * |
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45 | ! * |
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46 | !***************************************************************************** |
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47 | |
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48 | use par_mod, only: dp |
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49 | |
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50 | implicit none |
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51 | |
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52 | integer :: yyyymmdd,yyyy,mm,dd,hh,mi,ss,hhmiss |
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53 | integer :: julday,jy,jm,ja |
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54 | integer,parameter :: igreg=15+31*(10+12*1582) |
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55 | real(kind=dp) :: juldate |
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56 | |
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57 | yyyy=yyyymmdd/10000 |
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58 | mm=(yyyymmdd-10000*yyyy)/100 |
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59 | dd=yyyymmdd-10000*yyyy-100*mm |
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60 | hh=hhmiss/10000 |
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61 | mi=(hhmiss-10000*hh)/100 |
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62 | ss=hhmiss-10000*hh-100*mi |
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63 | |
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64 | if (yyyy.eq.0) then |
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65 | print*, 'there is no year zero.' |
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66 | stop |
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67 | end if |
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68 | if (yyyy.lt.0) yyyy=yyyy+1 |
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69 | if (mm.gt.2) then |
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70 | jy=yyyy |
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71 | jm=mm+1 |
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72 | else |
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73 | jy=yyyy-1 |
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74 | jm=mm+13 |
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75 | endif |
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76 | julday=int(365.25*jy)+int(30.6001*jm)+dd+1720995 |
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77 | if (dd+31*(mm+12*yyyy).ge.igreg) then |
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78 | ja=int(0.01*jy) |
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79 | julday=julday+2-ja+int(0.25*ja) |
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80 | endif |
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81 | |
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82 | juldate=real(julday,kind=dp) + real(hh,kind=dp)/24._dp + & |
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83 | real(mi,kind=dp)/1440._dp + real(ss,kind=dp)/86400._dp |
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84 | |
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85 | end function juldate |
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