Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 5 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/16/2019   22:14:40   (  -0.04,-128.39) (  -1.01,-132.62)  483.28                80
 05/17/2019   21:58:37   (  -0.05,-128.40) (   0.04,-128.10)   34.54                80
 05/20/2019   10:01:42   (   0.04,-128.42) (   0.11,-128.85)   47.71                80
 05/21/2019   09:42:57   (   0.04,-128.43) (  -0.89,-124.31)  469.53                80
 05/22/2019   22:02:14   (  -0.03,-128.44) (  -0.28,-129.62)  134.24                80
 05/23/2019   21:46:10   (  -0.04,-128.45) (   0.71,-125.09)  383.03                80
 05/25/2019   10:05:19   (   0.03,-128.46) (   0.43,-130.37)  216.96                80
 05/26/2019   09:49:15   (   0.04,-128.46) (  -0.57,-125.84)  299.94                80
 05/27/2019   22:08:32   (  -0.02,-128.47) (  -0.59,-131.15)  304.84                80
 05/28/2019   21:52:28   (  -0.03,-128.47) (   0.40,-126.61)  212.09                80