Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 4 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/20/2020   22:42:41   (   0.02,-137.20) (  -0.42,-139.10)  217.12                80
 04/21/2020   22:23:56   (   0.02,-137.20) (   0.60,-134.57)  299.56                80
 04/23/2020   10:45:43   (  -0.02,-137.20) (   0.59,-139.83)  300.66                80
 04/24/2020   10:24:19   (  -0.02,-137.20) (  -0.43,-135.30)  215.46                80
 04/25/2020   22:46:15   (   0.02,-137.19) (  -0.76,-140.60)  389.86                80
 04/26/2020   22:30:11   (   0.02,-137.18) (   0.26,-136.08)  125.83                80
 04/28/2020   10:51:58   (  -0.01,-137.17) (   0.93,-141.34)  475.86                80
 04/29/2020   10:30:34   (  -0.01,-137.15) (  -0.09,-136.81)   39.20                80
 05/01/2020   22:33:45   (   0.00,-137.11) (  -0.07,-137.58)   53.07                80
 05/02/2020   22:17:40   (   0.00,-137.10) (   0.90,-133.04)  461.73                80
 05/04/2020   10:39:27   (  -0.00,-137.07) (   0.30,-138.31)  141.36                80