Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 6 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/13/2020   22:27:22   (  -0.01,-137.19) (   0.25,-136.00)  135.25                80
 06/15/2020   10:51:49   (   0.01,-137.18) (   0.94,-141.26)  465.13                80
 06/16/2020   10:30:24   (   0.01,-137.18) (  -0.11,-136.74)   51.03                80
 06/18/2020   22:33:35   (   0.00,-137.17) (  -0.07,-137.50)   38.35                80
 06/19/2020   22:17:30   (   0.01,-137.16) (   0.92,-132.96)  477.13                80
 06/21/2020   10:39:17   (  -0.01,-137.14) (   0.26,-138.23)  125.16                80
 06/22/2020   10:17:53   (  -0.01,-137.12) (  -0.78,-133.70)  389.84                80
 06/23/2020   22:39:48   (   0.01,-137.09) (  -0.43,-139.00)  217.03                80
 06/24/2020   22:23:43   (   0.00,-137.08) (   0.62,-134.47)  297.64                80
 06/26/2020   10:45:30   (  -0.00,-137.05) (   0.62,-139.72)  305.79                80
 06/27/2020   10:24:05   (  -0.00,-137.02) (  -0.42,-135.20)  208.54                80