Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/26/2021   10:24:05   (  -0.04,-137.21) (  -0.48,-135.28)  220.80                80
 03/27/2021   22:48:40   (   0.04,-137.21) (  -0.74,-140.57)  383.48                80
 03/28/2021   22:27:16   (   0.04,-137.21) (   0.31,-136.05)  133.10                80
 03/30/2021   10:51:43   (  -0.04,-137.21) (   0.86,-141.31)  466.91                80
 03/31/2021   10:30:18   (  -0.04,-137.21) (  -0.12,-136.77)   49.09                80
 04/02/2021   22:33:28   (   0.04,-137.18) (  -0.05,-137.54)   41.28                80
 04/03/2021   22:17:24   (   0.03,-137.17) (   1.00,-133.02)  474.18                80
 04/05/2021   10:39:10   (  -0.03,-137.16) (   0.23,-138.27)  127.32                80
 04/06/2021   10:17:45   (  -0.02,-137.14) (  -0.76,-133.73)  387.89                80
 04/07/2021   22:39:41   (   0.02,-137.12) (  -0.39,-139.04)  218.98                80