Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 5 7.  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) (   0.54,-130.32)  234.27                80
 05/10/2019   09:49:05   (   0.06,-128.28) (  -0.51,-125.80)  283.74                80
 05/11/2019   22:08:23   (  -0.05,-128.31) (  -0.67,-131.10)  318.68                80
 05/12/2019   21:52:18   (  -0.06,-128.32) (   0.32,-126.57)  199.32                80
 05/14/2019   10:11:28   (   0.05,-128.34) (   0.82,-131.85)  399.44                80
 05/15/2019   09:55:23   (   0.05,-128.36) (  -0.17,-127.32)  118.22                80
 05/16/2019   22:14:40   (  -0.04,-128.37) (  -1.00,-132.63)  485.10                80
 05/17/2019   21:58:37   (  -0.04,-128.38) (   0.05,-128.10)   32.61                80
 05/20/2019   09:59:02   (   0.04,-128.41) (   0.10,-128.85)   49.79                80
 05/21/2019   09:42:57   (   0.04,-128.41) (  -0.89,-124.32)  467.34                80