Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 8 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)
 08/26/2018   10:08:43   (  -0.37,-134.71) (  -1.29,-130.68)  459.36                80
 08/27/2018   22:28:00   (   0.39,-134.67) (   0.10,-135.99)  150.36                80
 08/28/2018   22:11:56   (   0.38,-134.62) (   1.09,-131.45)  361.03                80
 08/30/2018   10:33:44   (  -0.39,-134.52) (   0.11,-136.72)  250.66                80
 08/31/2018   10:14:59   (  -0.39,-134.47) (  -0.88,-132.18)  259.97                80
 09/01/2018   22:34:17   (   0.40,-134.41) (  -0.30,-137.49)  351.67                80
 09/02/2018   22:18:12   (   0.40,-134.35) (   0.69,-132.95)  158.66                80
 09/04/2018   10:40:02   (  -0.41,-134.24) (   0.46,-138.23)  454.06                80
 09/05/2018   10:18:37   (  -0.41,-134.18) (  -0.53,-133.70)   55.34                80
 09/07/2018   22:21:49   (   0.42,-134.04) (   0.29,-134.46)   49.03                80