Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/12/2021   22:33:39   (   0.03,-137.25) (  -0.07,-137.57)   37.28                80
 01/13/2021   22:17:35   (   0.03,-137.25) (   0.95,-133.04)  479.17                80
 01/15/2021   10:39:23   (  -0.03,-137.24) (   0.20,-138.32)  122.32                80
 01/16/2021   10:17:59   (  -0.03,-137.24) (  -0.81,-133.79)  393.93                80
 01/17/2021   22:39:55   (   0.03,-137.24) (  -0.38,-139.09)  210.22                80
 01/18/2021   22:23:50   (   0.03,-137.24) (   0.64,-134.56)  305.92                80
 01/20/2021   10:45:38   (  -0.03,-137.23) (   0.58,-139.82)  295.88                80
 01/21/2021   10:24:13   (  -0.03,-137.23) (  -0.44,-135.29)  219.90                80
 01/22/2021   22:46:10   (   0.02,-137.22) (  -0.75,-140.60)  385.29                80
 01/23/2021   22:30:05   (   0.02,-137.21) (   0.27,-136.07)  130.12                80
 01/25/2021   10:51:52   (   0.02,-137.19) (   0.94,-141.33)  472.18                80