Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/15/2019   22:30:52   (   0.02,-137.19) (   0.27,-136.08)  126.17                80
 09/17/2019   10:52:39   (  -0.02,-137.20) (   0.94,-141.34)  472.24                80
 09/18/2019   10:31:15   (  -0.02,-137.21) (  -0.09,-136.81)   44.66                80
 09/20/2019   22:34:27   (   0.02,-137.20) (  -0.06,-137.59)   44.09                80
 09/21/2019   22:18:22   (   0.02,-137.19) (   0.96,-133.06)  472.01                80
 09/23/2019   10:40:10   (  -0.02,-137.19) (   0.24,-138.32)  128.39                80
 09/24/2019   10:18:45   (  -0.02,-137.18) (  -0.79,-133.79)  387.07                80
 09/25/2019   22:40:41   (   0.02,-137.16) (  -0.38,-139.09)  219.90                80
 09/26/2019   22:24:36   (   0.02,-137.15) (   0.59,-134.55)  295.39                80
 09/28/2019   10:46:24   (  -0.02,-137.14) (   0.56,-139.82)  305.95                80
 09/29/2019   10:27:39   (  -0.02,-137.12) (  -0.41,-135.28)  209.14                80