Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 6 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/10/2019   10:05:26   (  -0.02,-128.36) (   0.44,-130.38)  230.47                80
 06/11/2019   09:49:22   (  -0.01,-128.35) (  -0.56,-125.85)  284.60                80
 06/12/2019   22:08:39   (   0.03,-128.33) (  -0.60,-131.16)  322.75                80
 06/13/2019   21:52:34   (   0.02,-128.31) (   0.40,-126.63)  192.33                80
 06/15/2019   10:11:43   (  -0.05,-128.29) (   0.78,-131.90)  411.23                80
 06/16/2019   09:55:38   (  -0.04,-128.27) (  -0.22,-127.36)  103.32                80
 06/18/2019   21:58:51   (   0.05,-128.22) (   0.07,-128.14)    9.05                80
 06/21/2019   09:59:15   (  -0.06,-128.18) (   0.12,-128.88)   80.51                80
 06/22/2019   09:43:10   (  -0.05,-128.15) (  -0.88,-124.35)  433.66                80