Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/15/2021   10:39:23   (  -0.01,-137.24) (   0.23,-138.31)  122.22                80
 01/16/2021   10:17:58   (  -0.01,-137.23) (  -0.79,-133.78)  393.79                80
 01/17/2021   22:39:54   (   0.01,-137.24) (  -0.41,-139.08)  210.81                80
 01/18/2021   22:23:50   (   0.02,-137.23) (   0.61,-134.55)  305.12                80
 01/20/2021   10:45:38   (  -0.02,-137.22) (   0.55,-139.83)  297.05                80
 01/21/2021   10:24:14   (  -0.02,-137.21) (  -0.47,-135.30)  218.46                80
 01/22/2021   22:46:10   (   0.02,-137.20) (  -0.72,-140.60)  387.33                80
 01/23/2021   22:30:06   (   0.03,-137.19) (   0.30,-136.07)  127.72                80
 01/25/2021   10:51:53   (  -0.03,-137.16) (   0.92,-141.34)  475.94                80
 01/26/2021   10:30:28   (  -0.04,-137.15) (  -0.10,-136.81)   38.50                80