Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 12 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)
 12/27/2018   09:59:30   (  -0.03,-128.62) (   0.03,-128.95)   37.29                80
 12/28/2018   09:43:24   (  -0.03,-128.61) (  -0.95,-124.41)  478.15                80
 12/29/2018   22:02:40   (   0.04,-128.49) (  -0.22,-129.72)  140.13                80
 12/30/2018   21:46:35   (   0.04,-128.48) (   0.75,-125.18)  375.48                80
 01/01/2019   10:05:43   (  -0.05,-128.57) (   0.38,-130.46)  215.33                80
 01/02/2019   09:49:38   (  -0.04,-128.56) (  -0.60,-125.92)  299.83                80
 01/03/2019   22:08:54   (   0.05,-128.42) (  -0.56,-131.23)  319.51                80
 01/04/2019   21:52:49   (   0.04,-128.41) (   0.42,-126.69)  195.54                80
 01/06/2019   10:11:57   (  -0.05,-128.50) (   0.71,-131.97)  395.75                80
 01/07/2019   09:55:51   (  -0.04,-128.48) (  -0.26,-127.43)  118.86                80