Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 3 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)
 03/14/2020   22:33:42   (   0.00,-137.21) (  -0.10,-137.57)   41.94                80
 03/15/2020   22:17:37   (   0.00,-137.21) (   0.91,-133.04)  474.46                80
 03/17/2020   10:39:26   (   0.00,-137.21) (   0.25,-138.32)  126.53                80
 03/18/2020   10:18:01   (   0.00,-137.20) (  -0.76,-133.79)  389.30                80
 03/19/2020   22:39:57   (  -0.01,-137.19) (  -0.45,-139.09)  216.22                80
 03/20/2020   22:23:53   (  -0.01,-137.19) (   0.56,-134.56)  299.64                80
 03/22/2020   10:45:41   (   0.01,-137.18) (   0.60,-139.83)  301.61                80
 03/23/2020   10:24:17   (   0.01,-137.18) (  -0.42,-135.30)  213.81                80
 03/24/2020   22:46:13   (  -0.01,-137.16) (  -0.79,-140.60)  392.72                80
 03/25/2020   22:30:09   (  -0.01,-137.15) (   0.23,-136.07)  122.63                80
 03/27/2020   10:51:57   (   0.01,-137.14) (   0.93,-141.35)  479.16                80
 03/28/2020   10:30:32   (   0.01,-137.12) (  -0.09,-136.82)   35.65                80