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   22:41:39   (  -0.02,-137.22) (  -0.48,-139.27)  234.32                80
 11/02/2021   22:25:35   (  -0.02,-137.21) (   0.52,-134.74)  281.29                80
 11/04/2021   10:44:46   (   0.02,-137.20) (   0.64,-140.02)  321.12                80
 11/05/2021   10:28:42   (   0.02,-137.19) (  -0.36,-135.49)  193.87                80
 11/06/2021   22:48:00   (  -0.02,-137.17) (  -0.83,-140.80)  413.26                80
 11/07/2021   22:31:57   (  -0.02,-137.16) (   0.18,-136.27)  101.12                80
 11/10/2021   10:35:04   (   0.01,-137.11) (  -0.02,-137.02)   11.11                80
 11/12/2021   22:35:39   (  -0.01,-137.07) (  -0.15,-137.80)   83.29                80
 11/13/2021   22:19:35   (  -0.01,-137.05) (   0.86,-133.27)  430.72                80
 11/15/2021   10:38:44   (   0.00,-137.02) (   0.36,-138.54)  173.63                80