Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 5 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/07/2021   10:39:05   (  -0.02,-137.19) (   0.20,-138.24)  119.62                80
 05/08/2021   10:17:41   (  -0.02,-137.18) (  -0.77,-133.70)  395.94                80
 05/09/2021   22:42:19   (   0.01,-137.18) (  -0.39,-139.02)  209.41                80
 05/10/2021   22:20:56   (   0.02,-137.17) (   0.64,-134.49)  305.87                80
 05/12/2021   10:45:24   (  -0.01,-137.15) (   0.57,-139.76)  296.96                80
 05/13/2021   10:24:01   (  -0.02,-137.14) (  -0.46,-135.23)  217.72                80
 05/14/2021   22:45:58   (   0.01,-137.12) (  -0.75,-140.54)  389.24                80
 05/15/2021   22:29:54   (   0.01,-137.10) (   0.29,-136.01)  125.10                80
 05/17/2021   10:51:43   (  -0.01,-137.07) (   0.93,-141.28)  479.11                80
 05/18/2021   10:30:19   (  -0.01,-137.05) (  -0.10,-136.75)   34.85                80
 05/20/2021   22:33:32   (   0.00,-137.00) (  -0.12,-137.52)   59.97                80