Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 5 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)
 05/26/2018   10:30:37   (   0.05,-135.13) (   0.39,-136.67)  175.79                80
 05/27/2018   10:14:33   (   0.05,-135.10) (  -0.63,-132.14)  337.63                80
 05/28/2018   22:33:49   (  -0.03,-135.08) (  -0.55,-137.45)  269.31                80
 05/29/2018   22:17:44   (  -0.04,-135.05) (   0.41,-132.90)  243.89                80
 05/31/2018   10:36:52   (   0.02,-134.97) (   0.74,-138.18)  365.67                80
 06/01/2018   10:20:48   (   0.03,-134.93) (  -0.28,-133.65)  147.09                80
 06/02/2018   22:40:04   (  -0.01,-134.90) (  -0.89,-138.95)  461.19                80
 06/03/2018   22:23:58   (  -0.02,-134.86) (   0.07,-134.41)   51.42                80
 06/06/2018   10:24:21   (   0.01,-134.73) (   0.11,-135.14)   46.55                80
 06/07/2018   10:08:17   (   0.03,-134.69) (  -0.91,-130.61)  465.51                80