Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 4 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/10/2020   22:30:11   (   0.02,-137.21) (   0.29,-136.09)  128.50                80
 04/12/2020   10:51:59   (  -0.02,-137.21) (   0.91,-141.35)  472.11                80
 04/13/2020   10:30:34   (  -0.02,-137.21) (  -0.11,-136.82)   43.79                80
 04/15/2020   22:33:46   (   0.01,-137.19) (  -0.07,-137.59)   45.82                80
 04/16/2020   22:17:42   (   0.01,-137.18) (   0.96,-133.06)  470.03                80
 04/18/2020   10:39:29   (  -0.01,-137.17) (   0.24,-138.33)  131.23                80
 04/19/2020   10:18:04   (  -0.01,-137.17) (  -0.78,-133.80)  384.22                80
 04/20/2020   22:40:01   (   0.00,-137.15) (  -0.42,-139.10)  222.16                80
 04/21/2020   22:23:56   (   0.00,-137.14) (   0.61,-134.57)  293.18                80
 04/23/2020   10:45:44   (  -0.01,-137.12) (   0.59,-139.83)  308.83                80