Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 9 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/22/2013   10:37:46   (   0.33,-135.49) (   0.93,-138.23)  312.38                80
 09/23/2013   10:21:42   (   0.34,-135.48) (  -0.04,-133.70)  203.11                80
 09/24/2013   22:41:00   (  -0.31,-135.41) (  -1.12,-139.00)  409.93                80
 09/25/2013   22:24:57   (  -0.33,-135.40) (  -0.09,-134.48)  105.51                80
 09/27/2013   10:44:06   (   0.30,-135.44) (   1.24,-139.75)  491.43                80
 09/28/2013   10:28:02   (   0.31,-135.42) (   0.26,-135.22)   23.40                80
 09/30/2013   22:28:35   (  -0.29,-135.32) (  -0.44,-135.99)   76.30                80
 10/01/2013   22:12:31   (  -0.30,-135.30) (   0.53,-131.45)  438.49                80
 10/03/2013   10:31:40   (   0.27,-135.33) (   0.60,-136.72)  159.24                80
 10/04/2013   10:15:37   (   0.29,-135.31) (  -0.44,-132.20)  354.98                80