Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 5 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/13/2021   10:24:00   (  -0.02,-137.18) (  -0.46,-135.23)  222.50                80
 05/14/2021   22:48:38   (   0.01,-137.17) (  -0.76,-140.53)  383.85                80
 05/15/2021   22:27:14   (   0.02,-137.16) (   0.28,-136.01)  131.01                80
 05/17/2021   10:51:42   (  -0.01,-137.14) (   0.93,-141.28)  471.92                80
 05/18/2021   10:30:19   (  -0.01,-137.12) (  -0.10,-136.75)   42.51                80
 05/20/2021   22:33:33   (   0.01,-137.08) (  -0.07,-137.53)   50.98                80
 05/21/2021   22:17:28   (   0.01,-137.06) (   0.91,-133.00)  463.16                80
 05/23/2021   10:39:18   (  -0.01,-137.03) (   0.25,-138.27)  141.10                80
 05/24/2021   10:17:53   (  -0.01,-137.01) (  -0.73,-133.74)  372.48                80
 05/25/2021   22:39:51   (   0.01,-136.97) (  -0.47,-139.04)  236.75                80