Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 30.  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   10:51:43   (  -0.04,-137.21) (   0.86,-141.31)  466.83                80
 03/31/2021   10:30:18   (  -0.04,-137.21) (  -0.13,-136.78)   49.33                80
 04/02/2021   22:33:29   (   0.04,-137.20) (  -0.05,-137.54)   39.75                80
 04/03/2021   22:17:24   (   0.04,-137.19) (   1.00,-133.02)  475.90                80
 04/05/2021   10:39:10   (  -0.03,-137.17) (   0.22,-138.27)  126.10                80
 04/06/2021   10:17:45   (  -0.03,-137.16) (  -0.76,-133.74)  389.29                80
 04/07/2021   22:39:41   (   0.02,-137.14) (  -0.39,-139.04)  216.52                80
 04/08/2021   22:23:36   (   0.02,-137.13) (   0.60,-134.50)  298.87                80
 04/10/2021   10:45:23   (  -0.02,-137.11) (   0.56,-139.77)  303.38                80
 04/11/2021   10:23:58   (  -0.02,-137.09) (  -0.42,-135.24)  211.65                80
 04/12/2021   22:45:53   (   0.02,-137.07) (  -0.79,-140.53)  395.06                80