Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 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)
 08/28/2021   10:18:59   (   0.05,-137.20) (  -0.71,-133.90)  376.83                80
 08/29/2021   22:40:56   (  -0.05,-137.22) (  -0.48,-139.21)  226.42                80
 08/30/2021   22:24:52   (  -0.05,-137.22) (   0.52,-134.67)  290.23                80
 09/01/2021   10:46:40   (   0.04,-137.22) (   0.66,-139.94)  310.79                80
 09/02/2021   10:25:16   (   0.04,-137.22) (  -0.34,-135.41)  205.29                80
 09/03/2021   22:47:13   (  -0.03,-137.22) (  -0.84,-140.71)  399.66                80
 09/04/2021   22:31:10   (  -0.02,-137.21) (   0.21,-136.19)  116.08                80
 09/06/2021   10:50:18   (   0.01,-137.20) (   0.97,-141.46)  486.03                80
 09/07/2021   10:31:33   (   0.01,-137.19) (  -0.03,-136.93)   29.51                80
 09/09/2021   22:34:46   (  -0.01,-137.17) (  -0.14,-137.70)   61.00                80
 09/10/2021   22:18:42   (  -0.02,-137.16) (   0.85,-133.17)  454.07                80