Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 10 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)
 10/30/2021   10:38:23   (   0.02,-137.22) (   0.32,-138.49)  144.67                80
 10/31/2021   10:22:21   (   0.02,-137.22) (  -0.73,-133.97)  371.07                80
 11/01/2021   22:41:39   (  -0.02,-137.22) (  -0.45,-139.28)  234.56                80
 11/02/2021   22:25:36   (  -0.02,-137.21) (   0.55,-134.75)  280.95                80
 11/04/2021   10:44:45   (   0.02,-137.20) (   0.67,-140.02)  321.68                80
 11/05/2021   10:28:43   (   0.02,-137.19) (  -0.39,-135.50)  193.21                80
 11/06/2021   22:48:00   (  -0.02,-137.17) (  -0.85,-140.79)  414.15                80
 11/07/2021   22:31:56   (  -0.02,-137.15) (   0.15,-136.27)  100.17                80
 11/10/2021   10:32:23   (   0.01,-137.10) (   0.01,-137.02)    9.79                80
 11/12/2021   22:35:38   (  -0.01,-137.05) (  -0.17,-137.80)   84.91                80