Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 11 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)
 11/01/2021   22:41:38   (  -0.02,-137.22) (  -0.50,-139.27)  234.47                80
 11/02/2021   22:25:35   (  -0.02,-137.21) (   0.50,-134.74)  281.08                80
 11/04/2021   10:44:45   (   0.02,-137.20) (   0.66,-140.02)  321.38                80
 11/05/2021   10:28:42   (   0.02,-137.19) (  -0.34,-135.49)  193.54                80
 11/06/2021   22:48:00   (  -0.02,-137.17) (  -0.84,-140.80)  413.80                80
 11/07/2021   22:31:57   (  -0.02,-137.15) (   0.16,-136.27)  100.52                80
 11/10/2021   10:35:03   (   0.01,-137.11) (  -0.01,-137.02)   10.28                80
 11/12/2021   22:35:38   (  -0.01,-137.06) (  -0.16,-137.80)   84.27                80
 11/13/2021   22:19:35   (  -0.01,-137.04) (   0.84,-133.27)  429.63                80