Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 3 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/30/2019   21:55:41   (  -0.04,-128.12) (   0.00,-128.05)    9.78                80
 04/02/2019   09:58:42   (   0.05,-128.08) (   0.18,-128.77)   78.68                80
 04/03/2019   09:42:36   (   0.05,-128.05) (  -0.83,-124.24)  435.38                80
 04/04/2019   22:04:32   (  -0.05,-127.99) (  -0.37,-129.53)  174.93                80
 04/05/2019   21:43:06   (  -0.05,-127.97) (   0.64,-125.00)  338.79                80
 04/07/2019   10:04:52   (   0.05,-127.94) (   0.54,-130.26)  264.31                80
 04/08/2019   09:48:47   (   0.05,-127.90) (  -0.46,-125.73)  249.06                80
 04/09/2019   22:08:01   (  -0.05,-127.84) (  -0.78,-131.01)  362.34                80
 04/10/2019   21:51:56   (  -0.06,-127.80) (   0.23,-126.48)  150.45                80
 04/12/2019   10:11:02   (   0.06,-127.75) (   0.96,-131.74)  454.29                80