Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 12 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/01/2021   10:38:37   (  -0.00,-137.20) (   0.27,-138.52)  149.26                80
 12/02/2021   10:22:30   (   0.00,-137.20) (  -0.69,-133.97)  367.33                80
 12/03/2021   22:41:46   (  -0.00,-137.19) (  -0.46,-139.28)  237.80                80
 12/04/2021   22:25:39   (  -0.01,-137.18) (   0.51,-134.74)  278.18                80
 12/06/2021   10:44:45   (   0.01,-137.17) (   0.66,-140.00)  323.50                80
 12/07/2021   10:28:40   (   0.01,-137.16) (  -0.37,-135.47)  191.98                80
 12/08/2021   22:47:54   (  -0.01,-137.14) (  -0.84,-140.77)  414.41                80
 12/09/2021   22:31:49   (  -0.01,-137.12) (   0.19,-136.24)  101.00                80
 12/12/2021   10:32:09   (   0.00,-137.09) (   0.00,-136.96)   14.62                80
 12/14/2021   22:35:18   (  -0.00,-137.05) (  -0.17,-137.73)   77.46                80