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) (   0.27,-126.48)  151.45                80
 04/12/2019   10:11:02   (   0.06,-127.77) (   0.97,-131.73)  452.58                80
 04/13/2019   09:54:56   (   0.06,-127.73) (  -0.04,-127.20)   60.25                80
 04/15/2019   21:55:26   (  -0.06,-127.61) (  -0.14,-127.96)   39.52                80
 04/16/2019   21:39:21   (  -0.06,-127.57) (   0.87,-123.43)  472.94                80
 04/18/2019   09:58:27   (   0.06,-127.53) (   0.31,-128.69)  131.92                80
 04/19/2019   09:42:21   (   0.06,-127.49) (  -0.70,-124.15)  380.47                80
 04/20/2019   22:01:36   (  -0.06,-127.41) (  -0.54,-129.44)  232.29                80
 04/21/2019   21:45:30   (  -0.06,-127.36) (   0.48,-124.90)  279.78                80
 04/23/2019   10:04:37   (   0.06,-127.31) (   0.71,-130.17)  326.15                80
 04/24/2019   09:48:31   (   0.06,-127.26) (  -0.31,-125.63)  185.74                80