Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 5 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/27/2019   22:08:31   (  -0.02,-128.45) (  -0.64,-131.13)  306.14                80
 05/28/2019   21:52:28   (  -0.03,-128.45) (   0.41,-126.61)  210.48                80
 05/30/2019   10:11:36   (   0.01,-128.44) (   0.79,-131.88)  392.01                80
 05/31/2019   09:55:32   (   0.02,-128.44) (  -0.21,-127.35)  123.94                80
 06/01/2019   22:14:49   (  -0.00,-128.44) (  -0.95,-132.66)  481.28                80
 06/02/2019   21:58:44   (  -0.01,-128.43) (   0.04,-128.12)   34.49                80
 06/05/2019   09:59:09   (  -0.00,-128.40) (   0.09,-128.87)   53.98                80
 06/06/2019   09:43:05   (   0.01,-128.38) (  -0.90,-124.34)  460.85                80
 06/07/2019   22:02:22   (   0.01,-128.36) (  -0.25,-129.65)  146.22                80
 06/08/2019   21:46:18   (   0.00,-128.35) (   0.74,-125.12)  368.73                80
 06/10/2019   10:05:26   (  -0.02,-128.32) (   0.45,-130.38)  235.51                80