Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 10 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/27/2021   22:35:17   (  -0.03,-137.23) (  -0.15,-137.74)   59.10                80
 10/28/2021   22:19:13   (  -0.03,-137.22) (   0.84,-133.21)  456.78                80
 10/30/2021   10:38:23   (   0.02,-137.22) (   0.32,-138.49)  145.03                80
 10/31/2021   10:22:21   (   0.02,-137.22) (  -0.73,-133.97)  370.54                80
 11/01/2021   22:41:39   (  -0.02,-137.21) (  -0.45,-139.28)  235.51                80
 11/02/2021   22:25:36   (  -0.02,-137.20) (   0.54,-134.75)  279.83                80
 11/04/2021   10:44:46   (   0.02,-137.19) (   0.62,-140.03)  322.85                80
 11/05/2021   10:28:43   (   0.02,-137.18) (  -0.38,-135.50)  191.87                80
 11/06/2021   22:48:00   (  -0.01,-137.15) (  -0.86,-140.79)  415.91                80
 11/07/2021   22:31:57   (  -0.02,-137.13) (   0.20,-136.28)   98.23                80