Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 5 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/23/2019   21:46:10   (  -0.04,-128.44) (   0.73,-125.09)  382.69                80
 05/25/2019   10:05:19   (   0.03,-128.44) (   0.46,-130.36)  219.09                80
 05/26/2019   09:49:14   (   0.04,-128.44) (  -0.53,-125.83)  297.45                80
 05/27/2019   22:08:31   (  -0.02,-128.45) (  -0.63,-131.14)  306.59                80
 05/28/2019   21:52:27   (  -0.03,-128.45) (   0.36,-126.60)  210.04                80
 05/30/2019   10:11:36   (   0.01,-128.44) (   0.78,-131.88)  391.88                80
 05/31/2019   09:55:32   (   0.02,-128.44) (  -0.22,-127.35)  124.08                80
 06/01/2019   22:14:49   (  -0.00,-128.43) (  -0.94,-132.66)  481.67                80
 06/02/2019   21:58:45   (  -0.01,-128.43) (   0.06,-128.13)   34.08                80
 06/05/2019   09:59:09   (  -0.00,-128.40) (   0.08,-128.87)   53.80                80
 06/06/2019   09:43:05   (   0.01,-128.38) (  -0.91,-124.34)  461.08                80