Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 9 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/20/2020   10:33:43   (   0.05,-137.19) (  -0.05,-136.78)   46.70                80
 09/22/2020   22:34:15   (  -0.04,-137.16) (  -0.15,-137.54)   43.89                80
 09/23/2020   22:18:11   (  -0.04,-137.15) (   0.91,-133.02)  471.49                80
 09/25/2020   10:37:18   (   0.03,-137.14) (   0.32,-138.28)  130.67                80
 09/26/2020   10:21:15   (   0.03,-137.13) (  -0.75,-133.76)  384.33                80
 09/27/2020   22:40:31   (  -0.02,-137.10) (  -0.46,-139.06)  222.94                80
 09/28/2020   22:24:27   (  -0.02,-137.09) (   0.55,-134.53)  291.97                80
 09/30/2020   10:43:35   (   0.02,-137.07) (   0.62,-139.80)  310.51                80
 10/01/2020   10:27:31   (   0.02,-137.06) (  -0.39,-135.27)  204.28                80
 10/02/2020   22:46:47   (  -0.01,-137.03) (  -0.81,-140.57)  403.37                80