Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 9 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/02/2021   10:25:16   (   0.05,-137.20) (  -0.33,-135.41)  204.17                80
 09/03/2021   22:47:13   (  -0.04,-137.20) (  -0.85,-140.71)  400.81                80
 09/04/2021   22:31:09   (  -0.04,-137.20) (   0.21,-136.19)  114.96                80
 09/06/2021   10:50:18   (   0.03,-137.18) (   0.97,-141.46)  487.09                80
 09/07/2021   10:34:13   (   0.03,-137.18) (  -0.03,-136.93)   28.38                80
 09/09/2021   22:34:46   (  -0.03,-137.15) (  -0.15,-137.70)   62.29                80
 09/10/2021   22:18:42   (  -0.03,-137.14) (   0.85,-133.17)  452.70                80
 09/12/2021   10:37:50   (   0.03,-137.12) (   0.33,-138.44)  150.78                80
 09/13/2021   10:21:45   (   0.03,-137.10) (  -0.67,-133.90)  363.49                80
 09/14/2021   22:41:03   (  -0.02,-137.07) (  -0.50,-139.21)  244.53                80
 09/15/2021   22:24:58   (  -0.02,-137.04) (   0.50,-134.68)  269.27                80