BEGIN {day=86400.25 C=299792000.0 RADIANS = 3.14159 / 180.0 DEGREES = 180.0 / 3.14159 } /./ {dec=$1 freq=$2 b=$3 Lambda = C/freq fwidth= (DEGREES*Lambda)/b fwidth *= (4 * 60) fwidth /= cos(RADIANS*dec) printf ("%f seconds per fringe\n", fwidth) }