<?php

//------ get the gmt date ------------------------------------------------------
$dtg = gmdate('Ymd');

//------ use command line dtg if it's there ------------------------------------
if(isset($_GET['dtg'])){
	$dtg = $_GET['dtg'];
}


//------ get the hour ----------------------------------------------------------
$gmt_hr = gmdate('H');

  $hr = '18';
  
if($gmt_hr>4){
  $hr = '00';
}  
if($gmt_hr>10){
  $hr = '06';
}
if($gmt_hr>16){
  $hr = '12';
}
if($gmt_hr>22){
  $hr = '18';
}

//------ use command line hr if it's there -------------------------------------
if(isset($_GET['hr'])){
	$hr = $_GET['hr'];
}

//$hr='00';

//------ build the batch file --------------------------------------------------
$bfs  = "C:\n";
$bfs .= "";
$bfs .= "opengrads -l -b -c 'run gfs_wind $dtg" . "$hr 1000' -x\n";
$bfs .= "opengrads -l -b -c 'run gfs_wind $dtg" . "$hr  950' -x\n";
$bfs .= "opengrads -l -b -c 'run gfs_wind $dtg" . "$hr  900' -x\n";
$bfs .= "opengrads -l -b -c 'run gfs_wind $dtg" . "$hr  850' -x\n";
$bfs .= "opengrads -l -b -c 'run gfs_pbl $dtg" . "$hr' -x\n";
$bfs .= "opengrads -l -b -c 'run gfs_stream $dtg" . "$hr' -x\n";
$bfs .= "opengrads -l -b -c 'run nam_wind $dtg" . "$hr 1000' -x\n";
$bfs .= "opengrads -l -b -c 'run nam_wind $dtg" . "$hr  950' -x\n";
$bfs .= "opengrads -l -b -c 'run nam_wind $dtg" . "$hr  900' -x\n";
$bfs .= "opengrads -l -b -c 'run nam_wind $dtg" . "$hr  850' -x\n";
$bfs .= "opengrads -l -b -c 'run nam_pbl $dtg" . "$hr' -x\n";
$bfs .= "opengrads -l -b -c 'run nam_stream $dtg" . "$hr' -x\n";
$bfs .= "exit\n";

   //note:  command line switches: 
   //  -l = Run grads in landscape mode. The Portrait vs. Landscape question is not asked. 
   //  -b = Run grads in batch mode. No graphics output window is opened.
   //  -c = Execute the supplied string as the first GrADS command to execute after GrADS is started. 
   //  -x = causes GrADS to automatically quit after the supplied command has been executed.
   
//------ write the batch file to disk ------------------------------------------
  $fh = fopen("make_grads_graphics_2.bat", 'w');
  fwrite($fh, $bfs);
  fclose($fh);

?>