Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 6 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/24/2019   10:46:12   (  -0.00,-137.20) (   0.60,-139.87)  304.90                80
 06/25/2019   10:24:48   (   0.00,-137.19) (  -0.41,-135.34)  210.82                80
 06/26/2019   22:46:44   (   0.00,-137.16) (  -0.81,-140.64)  397.22                80
 06/27/2019   22:30:41   (   0.00,-137.15) (   0.26,-136.12)  118.21                80
 06/29/2019   10:52:29   (  -0.01,-137.15) (   0.92,-141.39)  482.16                80
 06/30/2019   10:31:04   (  -0.01,-137.14) (  -0.08,-136.86)   32.46                80
 07/02/2019   22:34:16   (   0.01,-137.07) (  -0.12,-137.62)   63.38                80
 07/03/2019   22:18:12   (   0.01,-137.05) (   0.89,-133.09)  450.78                80
 07/05/2019   10:40:00   (  -0.01,-137.03) (   0.29,-138.36)  151.11                80
 07/06/2019   10:18:36   (   0.00,-137.01) (  -0.72,-133.83)  362.61                80