Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 10 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/22/2021   22:31:34   (  -0.03,-137.21) (   0.17,-136.21)  113.83                80
 10/24/2021   10:50:44   (   0.03,-137.23) (   1.00,-141.49)  486.00                80
 10/25/2021   10:34:42   (   0.03,-137.23) (  -0.05,-136.97)   30.40                80
 10/27/2021   22:35:17   (  -0.02,-137.23) (  -0.14,-137.75)   59.44                80
 10/28/2021   22:19:13   (  -0.02,-137.22) (   0.85,-133.22)  456.30                80
 10/30/2021   10:38:24   (   0.01,-137.22) (   0.32,-138.49)  145.02                80
 10/31/2021   10:22:21   (   0.01,-137.22) (  -0.74,-133.98)  370.42                80
 11/01/2021   22:41:39   (  -0.01,-137.20) (  -0.45,-139.28)  236.35                80
 11/02/2021   22:25:36   (  -0.01,-137.20) (   0.55,-134.75)  278.86                80
 11/04/2021   10:44:46   (   0.01,-137.19) (   0.62,-140.03)  323.38                80