Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/31/2021   10:39:23   (  -0.03,-137.25) (   0.23,-138.32)  122.54                80
 02/01/2021   10:17:59   (  -0.03,-137.25) (  -0.79,-133.79)  394.28                80
 02/02/2021   22:39:55   (   0.03,-137.26) (  -0.39,-139.10)  209.56                80
 02/03/2021   22:23:51   (   0.03,-137.26) (   0.64,-134.57)  306.97                80
 02/05/2021   10:45:38   (  -0.02,-137.26) (   0.57,-139.83)  293.86                80
 02/06/2021   10:24:14   (  -0.02,-137.25) (  -0.45,-135.30)  222.16                80
 02/07/2021   22:46:09   (  -0.01,-137.24) (  -0.79,-140.60)  382.65                80
 02/08/2021   22:30:04   (  -0.01,-137.24) (   0.24,-136.07)  132.91                80
 02/10/2021   10:51:53   (   0.01,-137.22) (   0.91,-141.34)  469.10                80
 02/11/2021   10:30:28   (   0.01,-137.21) (  -0.11,-136.81)   46.29                80