Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 8 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/25/2018   10:24:47   (  -0.38,-134.76) (  -0.26,-135.21)   51.98                80
 08/26/2018   10:08:43   (  -0.37,-134.71) (  -1.30,-130.69)  459.41                80
 08/27/2018   22:28:00   (   0.39,-134.66) (   0.12,-135.99)  150.56                80
 08/28/2018   22:11:56   (   0.38,-134.62) (   1.11,-131.46)  360.85                80
 08/30/2018   10:33:44   (  -0.39,-134.52) (   0.09,-136.72)  250.65                80
 08/31/2018   10:15:00   (  -0.39,-134.47) (  -0.89,-132.19)  259.96                80
 09/01/2018   22:34:17   (   0.40,-134.41) (  -0.28,-137.49)  351.86                80
 09/02/2018   22:18:13   (   0.40,-134.35) (   0.71,-132.96)  158.44                80
 09/04/2018   10:40:01   (  -0.41,-134.24) (   0.50,-138.22)  454.08                80
 09/05/2018   10:18:36   (  -0.41,-134.18) (  -0.49,-133.69)   55.38                80