Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 8 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/28/2018   22:11:55   (   0.38,-134.62) (   1.08,-131.45)  360.74                80
 08/30/2018   10:31:04   (  -0.39,-134.52) (   0.12,-136.71)  250.50                80
 08/31/2018   10:15:00   (  -0.39,-134.47) (  -0.93,-132.19)  260.13                80
 09/01/2018   22:34:17   (   0.40,-134.40) (  -0.31,-137.49)  351.99                80
 09/02/2018   22:18:12   (   0.40,-134.35) (   0.68,-132.95)  158.32                80
 09/04/2018   10:40:01   (  -0.41,-134.24) (   0.46,-138.23)  453.98                80
 09/05/2018   10:18:37   (  -0.41,-134.18) (  -0.53,-133.70)   55.42                80
 09/07/2018   22:21:49   (   0.42,-134.03) (   0.29,-134.46)   49.38                80
 09/08/2018   22:05:45   (   0.42,-133.97) (   1.34,-129.93)  460.11                80
 09/10/2018   10:27:34   (  -0.42,-133.86) (  -0.14,-135.20)  152.68                80
 09/11/2018   10:06:09   (  -0.42,-133.79) (  -1.13,-130.67)  356.28                80