Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 3 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/28/2019   09:55:11   (   0.04,-128.20) (  -0.17,-127.28)  104.66                80
 03/30/2019   21:55:40   (  -0.05,-128.12) (  -0.03,-128.04)    9.22                80
 04/02/2019   09:58:41   (   0.05,-128.08) (   0.21,-128.77)   78.25                80
 04/03/2019   09:42:36   (   0.05,-128.06) (  -0.80,-124.23)  435.82                80
 04/04/2019   22:04:31   (  -0.05,-128.00) (  -0.40,-129.53)  174.60                80
 04/05/2019   21:43:06   (  -0.05,-127.97) (   0.61,-124.99)  339.15                80
 04/07/2019   10:04:52   (   0.05,-127.94) (   0.57,-130.25)  263.56                80
 04/08/2019   09:48:46   (   0.05,-127.91) (  -0.43,-125.72)  249.84                80
 04/09/2019   22:08:02   (  -0.05,-127.84) (  -0.75,-131.02)  361.69                80