Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 4 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/02/2019   09:58:41   (   0.05,-128.08) (   0.21,-128.77)   78.68                80
 04/03/2019   09:42:36   (   0.05,-128.05) (  -0.80,-124.23)  435.30                80
 04/04/2019   22:04:31   (  -0.05,-127.99) (  -0.40,-129.53)  174.93                80
 04/05/2019   21:43:06   (  -0.05,-127.96) (   0.61,-124.99)  338.70                80
 04/07/2019   10:04:52   (   0.05,-127.93) (   0.58,-130.25)  264.53                80
 04/08/2019   09:48:46   (   0.05,-127.90) (  -0.43,-125.72)  248.78                80
 04/09/2019   22:08:02   (  -0.05,-127.83) (  -0.76,-131.02)  362.56                80
 04/10/2019   21:51:56   (  -0.06,-127.80) (   0.25,-126.48)  150.17                80
 04/12/2019   10:11:02   (   0.06,-127.75) (   0.94,-131.74)  454.76                80
 04/13/2019   09:54:57   (   0.06,-127.71) (  -0.07,-127.21)   57.67                80