Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 5 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)
 05/09/2019   10:05:09   (   0.05,-128.27) (   0.51,-130.33)  234.18                80
 05/10/2019   09:49:05   (   0.06,-128.28) (  -0.48,-125.79)  283.86                80
 05/11/2019   22:08:22   (  -0.05,-128.31) (  -0.70,-131.10)  318.53                80
 05/12/2019   21:52:19   (  -0.06,-128.32) (   0.35,-126.58)  199.52                80
 05/14/2019   10:11:27   (   0.05,-128.35) (   0.85,-131.84)  399.15                80
 05/15/2019   09:55:24   (   0.05,-128.36) (  -0.20,-127.32)  118.57                80
 05/16/2019   22:14:41   (  -0.04,-128.37) (  -0.97,-132.63)  484.74                80
 05/17/2019   21:58:36   (  -0.04,-128.39) (   0.02,-128.10)   32.87                80
 05/20/2019   09:59:01   (   0.04,-128.41) (   0.13,-128.84)   49.14                80
 05/21/2019   09:42:57   (   0.04,-128.42) (  -0.86,-124.31)  467.93                80