Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 3 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/18/2019   09:40:09   (   0.03,-128.36) (  -0.91,-124.30)  462.83                80
 03/19/2019   22:04:43   (  -0.03,-128.30) (  -0.35,-129.59)  147.57                80
 03/20/2019   21:43:19   (  -0.03,-128.29) (   0.71,-125.06)  367.95                80
 03/22/2019   10:05:05   (   0.03,-128.31) (   0.48,-130.32)  229.14                80
 03/23/2019   09:46:19   (   0.03,-128.30) (  -0.52,-125.79)  286.23                80
 03/24/2019   22:10:55   (  -0.03,-128.24) (  -0.68,-131.08)  324.59                80
 03/25/2019   21:49:29   (  -0.03,-128.22) (   0.33,-126.55)  190.45                80
 03/27/2019   10:11:17   (   0.04,-128.24) (   0.81,-131.82)  407.53                80
 03/28/2019   09:55:11   (   0.04,-128.22) (  -0.20,-127.29)  107.40                80
 03/30/2019   21:55:41   (  -0.04,-128.14) (   0.01,-128.05)   11.04                80