Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 4 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/09/2019   22:08:01   (  -0.05,-127.84) (  -0.79,-131.01)  361.66                80
 04/10/2019   21:51:56   (  -0.05,-127.81) (   0.22,-126.47)  151.35                80
 04/12/2019   10:11:02   (   0.06,-127.77) (   0.96,-131.74)  452.86                80
 04/13/2019   09:54:56   (   0.06,-127.73) (  -0.05,-127.20)   59.82                80
 04/15/2019   21:55:26   (  -0.06,-127.61) (  -0.13,-127.96)   40.13                80
 04/16/2019   21:39:21   (  -0.07,-127.57) (   0.88,-123.43)  472.27                80
 04/18/2019   09:58:27   (   0.06,-127.52) (   0.30,-128.69)  132.82                80
 04/19/2019   09:42:21   (   0.06,-127.48) (  -0.66,-124.14)  379.53                80
 04/20/2019   22:01:36   (  -0.06,-127.40) (  -0.52,-129.44)  233.30                80
 04/21/2019   21:45:31   (  -0.06,-127.35) (   0.49,-124.91)  278.65                80