$sat_alb_file = "ar2017052320_goes15_20170523_2030.satalb";
$sat_alb_bird = "goes13 goes15";
$sat_alb_date = "goes13:20170523_2015 goes15:20170523_2030";
$sat_alb_chan = "vis";
$sat_alb_data = "ar2017052320_goes13_20170523_2015.satalb ar2017052320_goes15_20170523_2030.satalb";