Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/22/2021   22:42:28   (   0.04,-137.22) (  -0.36,-139.08)  211.32                80
 03/23/2021   22:21:02   (   0.04,-137.25) (   0.62,-134.54)  308.65                80
 03/25/2021   10:45:30   (  -0.03,-137.29) (   0.55,-139.81)  286.75                80
 03/26/2021   10:24:05   (  -0.03,-137.32) (  -0.49,-135.28)  232.78                80
 03/27/2021   22:48:41   (   0.03,-137.36) (  -0.67,-140.59)  366.98                80
 03/28/2021   22:27:16   (   0.03,-137.39) (   0.31,-136.05)  152.25                80
 03/30/2021   10:51:43   (  -0.03,-137.42) (   0.86,-141.32)  444.19                80
 03/31/2021   10:30:19   (  -0.03,-137.44) (  -0.19,-136.79)   74.42                80
 04/02/2021   22:33:30   (   0.03,-137.48) (   0.02,-137.56)    8.80                80