It's a good idea to timestamp the images with Greenwich Mean Time since that's what NOAA uses: I updated my script with your modified timestamp.
#NOAA updates the images on the GOES website every 30 minutes
use strict;
use LWP::Simple;
use POSIX;
my $image;
my $url;
my %images = (
"eastconusir" => "http://www.goes.noaa.gov/GIFS/ECIR.JPG",
"eastconusvis" => "http://www.goes.noaa.gov/GIFS/ECVS.JPG",
"eastconuswv" => "http://www.goes.noaa.gov/GIFS/ECWV.JPG",
"westconusir" => "http://www.goes.noaa.gov/GIFS/WCIR.JPG",
"westconusvis" => "http://www.goes.noaa.gov/GIFS/WCVS.JPG",
"westconusvwv" => "http://www.goes.noaa.gov/GIFS/WCWV.JPG",
);
foreach my $key (keys %images) {
print $key."\n";
my $epoch = ( head( $images{$key} ) )[ 2 ] || next;
my $timestring = strftime( "%Y%m%d_%H%M%S", gmtime( $epoch ) );
print $timestring."\n";
print $images{$key}."\n";
my $status = getstore($images{$key},$key.$timestring.".jpg");
print $status."\n" ;
};
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