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)
 03/27/2019   10:11:16   (   0.04,-128.22) (   0.84,-131.82)  409.61                80
 03/28/2019   09:55:11   (   0.04,-128.20) (  -0.17,-127.28)  105.05                80
 03/30/2019   21:55:40   (  -0.05,-128.12) (  -0.03,-128.04)    9.50                80
 04/02/2019   09:58:41   (   0.05,-128.09) (   0.21,-128.77)   77.27                80
 04/03/2019   09:42:36   (   0.05,-128.07) (  -0.80,-124.23)  436.91                80
 04/04/2019   22:04:31   (  -0.05,-128.01) (  -0.39,-129.53)  173.73                80
 04/05/2019   21:43:06   (  -0.05,-127.98) (   0.61,-124.99)  340.13                80
 04/07/2019   10:04:52   (   0.05,-127.96) (   0.57,-130.26)  262.00                80
 04/08/2019   09:48:46   (   0.05,-127.93) (  -0.44,-125.72)  251.51                80