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

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/18/2020   22:36:16   (  -0.01,-137.20) (  -0.05,-137.51)   34.96                80
 06/19/2020   22:14:50   (   0.00,-137.19) (   0.93,-132.97)  481.37                80
 06/21/2020   10:39:17   (  -0.00,-137.19) (   0.25,-138.23)  119.51                80
 06/22/2020   10:17:53   (  -0.01,-137.18) (  -0.80,-133.71)  396.17                80
 06/23/2020   22:42:28   (   0.01,-137.16) (  -0.42,-139.00)  209.78                80
 06/24/2020   22:23:44   (   0.01,-137.15) (   0.63,-134.47)  305.61                80
 06/26/2020   10:45:31   (  -0.01,-137.13) (   0.56,-139.74)  296.40                80
 06/27/2020   10:24:06   (  -0.01,-137.12) (  -0.43,-135.20)  218.73                80
 06/28/2020   22:46:01   (   0.01,-137.09) (  -0.78,-140.49)  388.11                80
 06/29/2020   22:29:56   (   0.01,-137.08) (   0.26,-135.97)  126.68                80