Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 5 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/16/2019   22:14:41   (  -0.04,-128.39) (  -0.99,-132.63)  483.22                80
 05/17/2019   21:58:36   (  -0.05,-128.40) (   0.00,-128.09)   34.59                80
 05/20/2019   09:59:01   (   0.04,-128.42) (   0.15,-128.84)   47.82                80
 05/21/2019   09:42:57   (   0.04,-128.43) (  -0.90,-124.32)  469.33                80
 05/22/2019   22:02:14   (  -0.03,-128.44) (  -0.32,-129.61)  134.41                80
 05/23/2019   21:46:10   (  -0.04,-128.45) (   0.73,-125.09)  382.87                80
 05/25/2019   10:05:19   (   0.03,-128.46) (   0.47,-130.36)  217.27                80
 05/26/2019   09:49:14   (   0.04,-128.46) (  -0.52,-125.83)  299.60                80
 05/27/2019   22:08:31   (  -0.02,-128.46) (  -0.64,-131.14)  305.16                80
 05/28/2019   21:52:28   (  -0.03,-128.47) (   0.41,-126.62)  211.76                80
 05/30/2019   10:11:36   (   0.01,-128.48) (   0.79,-131.88)  388.63                80