Atacama Pathfinder EXperiment APEX
Atmosphere at Chajnantor
MPIfR Bonn   ESO   Onsala Space Observatory
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"; $trans = explode(" ",$line); fclose($fp); $col = round($readwater*20.0-1); $t1 = $trans[$col]; $test = round($readwater-($col+1)*0.05,3); //echo "test: $test col: $col trans: $t1 water: $readwater
"; if ($test < 0) { // $t2 = $trans[$col-1]; $t2 = 1.0; $transmission = $t1+($t1-$t2)*$test/0.05; } if ($test > 0) { $t2 = $trans[$col+1]; $transmission = $t1-($t1-$t2)*$test/0.05; } if ($test == 0) { $transmission = $trans[$col]; } //$transmission = 0.66696*exp(-$water1*1.49663); $tau=-1*log($transmission); return $tau; //return $transmission; } function waterlabocafunction($water){ $readwater=$water; $fp = @fopen("../../../html/dbtest/atm/laboca-trans-bandpass.dat", "r"); $line = trim(fgets($fp, 5000)); // echo "$line

"; $trans = explode(" ",$line); fclose($fp); $col = round($readwater*20.0-1); $t1 = $trans[$col]; $test = round($readwater-($col+1)*0.05,3); //echo "test: $test
"; if ($test < 0) { $t2 = $trans[$col-1]; $transmission = $t1+($t1-$t2)*$test/0.05; } if ($test > 0) { $t2 = $trans[$col+1]; $transmission = $t1-($t1-$t2)*$test/0.05; } if ($test == 0) { $transmission = $trans[$col]; } $tau=-1*log($transmission); return $tau; } ?>
pwv [mm]tau
LABOCA Tau estimation :