Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 15.  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   10:39:22   (  -0.01,-137.24) (   0.24,-138.31)  122.26                80
 01/16/2021   10:17:58   (  -0.01,-137.23) (  -0.77,-133.78)  393.78                80
 01/17/2021   22:39:55   (   0.02,-137.24) (  -0.37,-139.09)  210.87                80
 01/18/2021   22:23:50   (   0.02,-137.23) (   0.59,-134.55)  305.10                80
 01/20/2021   10:45:38   (  -0.02,-137.22) (   0.56,-139.83)  297.01                80
 01/21/2021   10:24:14   (  -0.02,-137.21) (  -0.46,-135.30)  218.48                80
 01/22/2021   22:46:10   (   0.02,-137.20) (  -0.74,-140.60)  387.31                80
 01/23/2021   22:30:05   (   0.03,-137.19) (   0.28,-136.07)  127.72                80
 01/25/2021   10:51:53   (  -0.03,-137.16) (   0.93,-141.33)  475.86                80
 01/26/2021   10:30:28   (  -0.04,-137.15) (  -0.09,-136.81)   38.64                80
 01/28/2021   22:33:40   (   0.04,-137.10) (  -0.07,-137.58)   54.70                80