Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 3 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/19/2020   22:39:58   (   0.00,-137.19) (  -0.42,-139.09)  216.45                80
 03/20/2020   22:23:53   (   0.01,-137.19) (   0.59,-134.56)  299.37                80
 03/22/2020   10:45:42   (  -0.01,-137.18) (   0.57,-139.84)  302.28                80
 03/23/2020   10:24:17   (  -0.01,-137.17) (  -0.44,-135.31)  213.22                80
 03/24/2020   22:46:14   (   0.01,-137.16) (  -0.77,-140.61)  392.91                80
 03/25/2020   22:30:09   (   0.01,-137.15) (   0.25,-136.08)  122.48                80
 03/27/2020   10:51:57   (  -0.01,-137.14) (   0.91,-141.35)  479.74                80
 03/28/2020   10:30:33   (  -0.01,-137.12) (  -0.11,-136.82)   35.13                80
 03/30/2020   22:33:45   (   0.01,-137.07) (  -0.09,-137.59)   58.70                80
 03/31/2020   22:17:40   (   0.02,-137.05) (   0.93,-133.06)  455.36                80