Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 5 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/15/2019   22:33:57   (  -0.01,-137.18) (  -0.08,-137.59)   45.48                80
 05/16/2019   22:17:53   (  -0.01,-137.18) (   0.91,-133.05)  470.75                80
 05/18/2019   10:39:41   (   0.01,-137.21) (   0.28,-138.32)  127.65                80
 05/19/2019   10:18:18   (   0.01,-137.20) (  -0.77,-133.80)  387.84                80
 05/20/2019   22:40:14   (  -0.00,-137.16) (  -0.46,-139.10)  221.39                80
 05/21/2019   22:24:11   (  -0.00,-137.15) (   0.59,-134.57)  294.02                80
 05/23/2019   10:45:59   (  -0.00,-137.17) (   0.61,-139.84)  304.96                80
 05/24/2019   10:24:35   (  -0.00,-137.16) (  -0.44,-135.32)  209.82                80
 05/25/2019   22:46:32   (   0.01,-137.10) (  -0.78,-140.62)  400.81                80
 05/26/2019   22:30:27   (   0.01,-137.09) (   0.21,-136.08)  114.06                80