Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 3 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/27/2019   10:11:16   (   0.04,-128.22) (   0.83,-131.82)  409.80                80
 03/28/2019   09:55:11   (   0.04,-128.20) (  -0.17,-127.28)  104.80                80
 03/30/2019   21:55:41   (  -0.05,-128.12) (  -0.02,-128.04)    9.35                80
 04/02/2019   09:58:41   (   0.05,-128.08) (   0.20,-128.77)   77.86                80
 04/03/2019   09:42:36   (   0.05,-128.06) (  -0.81,-124.23)  436.26                80
 04/04/2019   22:04:31   (  -0.05,-128.00) (  -0.39,-129.53)  174.26                80
 04/05/2019   21:43:06   (  -0.05,-127.97) (   0.62,-125.00)  339.54                80
 04/07/2019   10:04:52   (   0.05,-127.95) (   0.57,-130.26)  262.93                80
 04/08/2019   09:48:47   (   0.05,-127.92) (  -0.44,-125.72)  250.52                80