Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 10 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)
 10/22/2019   22:34:19   (  -0.00,-137.21) (  -0.11,-137.60)   45.09                80
 10/23/2019   22:18:15   (  -0.00,-137.20) (   0.93,-133.07)  471.19                80
 10/25/2019   10:40:02   (   0.00,-137.20) (   0.25,-138.34)  130.11                80
 10/26/2019   10:18:36   (   0.00,-137.20) (  -0.73,-133.80)  385.80                80
 10/27/2019   22:40:33   (  -0.00,-137.19) (  -0.42,-139.12)  219.50                80
 10/28/2019   22:24:27   (   0.00,-137.18) (   0.56,-134.58)  296.15                80
 10/30/2019   10:46:14   (  -0.00,-137.17) (   0.62,-139.85)  306.11                80
 10/31/2019   10:24:50   (  -0.00,-137.16) (  -0.43,-135.33)  209.09                80
 11/01/2019   22:46:45   (  -0.00,-137.14) (  -0.78,-140.63)  397.45                80
 11/02/2019   22:30:40   (  -0.00,-137.13) (   0.21,-136.09)  117.56                80