Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 3 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/11/2019   10:14:07   (   0.01,-128.40) (   0.81,-131.86)  394.92                80
 03/12/2019   09:52:43   (   0.01,-128.40) (  -0.25,-127.34)  121.46                80
 03/13/2019   22:17:18   (  -0.01,-128.35) (  -0.96,-132.64)  488.64                80
 03/14/2019   21:55:52   (  -0.01,-128.34) (   0.04,-128.10)   27.12                80
 03/17/2019   09:58:54   (   0.01,-128.36) (   0.10,-128.84)   53.74                80
 03/18/2019   09:40:09   (   0.01,-128.35) (  -0.90,-124.30)  461.74                80
 03/19/2019   22:04:44   (  -0.02,-128.28) (  -0.29,-129.60)  149.45                80
 03/20/2019   21:43:19   (  -0.01,-128.27) (   0.71,-125.06)  365.75                80
 03/22/2019   10:05:05   (   0.02,-128.30) (   0.49,-130.32)  231.28                80
 03/23/2019   09:46:20   (   0.01,-128.28) (  -0.57,-125.80)  283.89                80