Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/30/2021   10:51:42   (  -0.04,-137.22) (   0.90,-141.31)  466.74                80
 03/31/2021   10:30:18   (  -0.04,-137.21) (  -0.14,-136.78)   49.39                80
 04/02/2021   22:33:29   (   0.04,-137.19) (  -0.03,-137.55)   39.97                80
 04/03/2021   22:17:23   (   0.04,-137.19) (   0.96,-133.01)  475.65                80
 04/05/2021   10:39:11   (  -0.03,-137.17) (   0.21,-138.28)  126.18                80
 04/06/2021   10:17:45   (  -0.03,-137.16) (  -0.78,-133.74)  389.17                80
 04/07/2021   22:39:41   (   0.02,-137.14) (  -0.43,-139.03)  216.89                80
 04/08/2021   22:23:36   (   0.02,-137.13) (   0.62,-134.51)  298.48                80
 04/10/2021   10:45:22   (  -0.02,-137.11) (   0.60,-139.76)  303.61                80
 04/11/2021   10:23:58   (  -0.02,-137.09) (  -0.44,-135.24)  211.41                80