Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 5 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/17/2021   10:51:43   (  -0.01,-137.20) (   0.89,-141.28)  464.81                80
 05/18/2021   10:30:19   (  -0.01,-137.20) (  -0.08,-136.75)   51.43                80
 05/20/2021   22:36:12   (   0.01,-137.20) (  -0.09,-137.53)   38.22                80
 05/21/2021   22:14:49   (   0.01,-137.19) (   0.95,-133.00)  477.60                80
 05/23/2021   10:39:17   (  -0.01,-137.19) (   0.26,-138.27)  123.42                80
 05/24/2021   10:17:54   (  -0.01,-137.18) (  -0.78,-133.75)  391.86                80
 05/25/2021   22:42:31   (   0.01,-137.16) (  -0.41,-139.05)  215.17                80
 05/26/2021   22:21:08   (   0.01,-137.15) (   0.63,-134.53)  299.60                80
 05/28/2021   10:45:36   (  -0.01,-137.13) (   0.58,-139.79)  303.12                80
 05/29/2021   10:24:12   (  -0.01,-137.12) (  -0.40,-135.26)  211.27                80