Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 3 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/08/2019   22:11:06   (   0.00,-128.36) (  -0.63,-131.14)  316.83                80
 03/09/2019   21:49:40   (   0.00,-128.36) (   0.37,-126.60)  199.70                80
 03/11/2019   10:11:28   (  -0.00,-128.40) (   0.75,-131.88)  395.79                80
 03/12/2019   09:55:22   (  -0.00,-128.39) (  -0.26,-127.34)  120.45                80
 03/13/2019   22:17:16   (  -0.00,-128.34) (  -0.98,-132.63)  489.57                80
 03/14/2019   21:55:51   (  -0.00,-128.33) (   0.04,-128.10)   26.09                80
 03/17/2019   09:58:52   (   0.00,-128.34) (   0.10,-128.83)   55.53                80
 03/18/2019   09:42:45   (   0.00,-128.32) (  -0.87,-124.28)  459.86                80
 03/19/2019   22:04:41   (  -0.00,-128.26) (  -0.28,-129.59)  151.13                80
 03/20/2019   21:43:14   (  -0.00,-128.24) (   0.70,-125.04)  364.10                80