Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 11 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/01/2018   09:49:42   (   0.05,-128.52) (  -0.56,-125.89)  299.66                80
 12/02/2018   22:08:58   (  -0.02,-128.45) (  -0.64,-131.20)  313.55                80
 12/03/2018   21:52:54   (  -0.03,-128.47) (   0.39,-126.67)  205.22                80
 12/05/2018   10:12:02   (   0.01,-128.60) (   0.74,-131.95)  381.95                80
 12/06/2018   09:55:56   (   0.03,-128.61) (  -0.23,-127.41)  136.11                80
 12/07/2018   22:15:13   (  -0.00,-128.52) (  -0.96,-132.72)  478.66                80
 12/08/2018   21:59:08   (  -0.02,-128.54) (   0.07,-128.19)   39.47                80
 12/11/2018   09:59:31   (   0.01,-128.67) (   0.09,-128.93)   30.41                80
 12/12/2018   09:43:27   (   0.02,-128.68) (  -0.94,-124.41)  487.07                80
 12/13/2018   22:02:43   (   0.00,-128.58) (  -0.24,-129.71)  128.79                80