Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 9 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/25/2013   22:24:57   (  -0.33,-135.40) (  -0.11,-134.47)  105.53                80
 09/27/2013   10:44:06   (   0.30,-135.44) (   1.25,-139.75)  491.40                80
 09/28/2013   10:28:01   (   0.31,-135.42) (   0.28,-135.21)   23.50                80
 09/30/2013   22:28:35   (  -0.29,-135.32) (  -0.46,-135.98)   76.27                80
 10/01/2013   22:12:32   (  -0.30,-135.30) (   0.57,-131.46)  438.57                80
 10/03/2013   10:31:41   (   0.27,-135.33) (   0.56,-136.73)  159.17                80
 10/04/2013   10:15:37   (   0.29,-135.31) (  -0.41,-132.19)  355.04                80
 10/05/2013   22:34:54   (  -0.26,-135.21) (  -0.80,-137.49)  261.12                80
 10/06/2013   22:18:50   (  -0.27,-135.18) (   0.24,-132.97)  252.87                80
 10/08/2013   10:38:00   (   0.24,-135.20) (   0.90,-138.24)  345.94                80