Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 3 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/25/2019   21:49:29   (  -0.03,-128.22) (   0.33,-126.55)  190.61                80
 03/27/2019   10:11:16   (   0.04,-128.22) (   0.86,-131.81)  409.35                80
 03/28/2019   09:55:10   (   0.04,-128.20) (  -0.15,-127.28)  105.39                80
 03/30/2019   21:55:40   (  -0.05,-128.13) (  -0.04,-128.04)    9.96                80
 04/02/2019   09:58:41   (   0.05,-128.10) (   0.23,-128.76)   76.68                80
 04/03/2019   09:42:35   (   0.05,-128.07) (  -0.78,-124.23)  437.62                80
 04/04/2019   22:04:31   (  -0.05,-128.01) (  -0.41,-129.53)  173.17                80
 04/05/2019   21:43:05   (  -0.05,-127.98) (   0.60,-124.99)  340.77                80
 04/07/2019   10:04:52   (   0.05,-127.97) (   0.59,-130.25)  261.06                80