Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 4 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/10/2019   21:51:56   (  -0.05,-127.81) (   0.23,-126.47)  151.42                80
 04/12/2019   10:11:02   (   0.06,-127.77) (   0.95,-131.74)  452.67                80
 04/13/2019   09:54:57   (   0.06,-127.73) (  -0.06,-127.20)   60.04                80
 04/15/2019   21:55:26   (  -0.06,-127.61) (  -0.12,-127.97)   39.87                80
 04/16/2019   21:39:20   (  -0.07,-127.57) (   0.83,-123.42)  472.63                80
 04/18/2019   09:58:26   (   0.06,-127.52) (   0.35,-128.68)  132.36                80
 04/19/2019   09:42:21   (   0.06,-127.48) (  -0.66,-124.14)  380.01                80
 04/20/2019   22:01:36   (  -0.06,-127.40) (  -0.51,-129.44)  232.79                80
 04/21/2019   21:45:31   (  -0.06,-127.36) (   0.50,-124.91)  279.21                80
 04/23/2019   10:04:37   (   0.06,-127.30) (   0.68,-130.17)  326.82                80