Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 10 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/16/2021   22:41:16   (  -0.03,-137.20) (  -0.45,-139.21)  229.23                80
 10/17/2021   22:25:12   (  -0.03,-137.20) (   0.54,-134.68)  286.63                80
 10/19/2021   10:44:22   (   0.03,-137.20) (   0.63,-139.96)  314.32                80
 10/20/2021   10:28:19   (   0.03,-137.20) (  -0.36,-135.43)  201.29                80
 10/21/2021   22:47:37   (  -0.03,-137.18) (  -0.84,-140.74)  405.51                80
 10/22/2021   22:31:34   (  -0.03,-137.18) (   0.16,-136.21)  109.73                80
 10/24/2021   10:50:44   (   0.02,-137.17) (   1.01,-141.48)  492.50                80
 10/25/2021   10:34:42   (   0.03,-137.16) (  -0.04,-136.97)   22.25                80
 10/27/2021   22:35:16   (  -0.02,-137.11) (  -0.15,-137.75)   72.08                80
 10/28/2021   22:19:13   (  -0.02,-137.09) (   0.85,-133.22)  441.97                80
 10/30/2021   10:38:23   (   0.01,-137.07) (   0.32,-138.49)  161.73                80