Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 11 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/21/2019   10:30:56   (  -0.01,-137.18) (  -0.10,-136.83)   40.27                80
 11/23/2019   22:36:45   (   0.00,-137.17) (  -0.11,-137.59)   49.31                80
 11/24/2019   22:18:01   (  -0.00,-137.16) (   0.94,-133.07)  466.41                80
 11/26/2019   10:39:47   (   0.01,-137.14) (   0.27,-138.33)  136.10                80
 11/27/2019   10:18:22   (   0.01,-137.12) (  -0.72,-133.80)  378.80                80
 11/28/2019   22:42:57   (  -0.01,-137.10) (  -0.48,-139.10)  227.92                80
 11/29/2019   22:21:33   (  -0.01,-137.08) (   0.57,-134.57)  286.71                80
 12/01/2019   10:45:59   (   0.01,-137.06) (   0.64,-139.83)  316.84                80
 12/02/2019   10:24:33   (   0.00,-137.04) (  -0.36,-135.30)  197.46                80
 12/03/2019   22:49:10   (  -0.00,-137.01) (  -0.78,-140.61)  410.02                80