Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 1 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/20/2020   10:04:44   (  -0.05,-128.43) (   0.39,-130.27)  210.39                80
 01/21/2020   09:48:38   (  -0.04,-128.42) (  -0.63,-125.74)  306.18                80
 01/22/2020   22:10:33   (   0.04,-128.42) (  -0.54,-131.04)  298.63                80
 01/23/2020   21:49:08   (   0.03,-128.41) (   0.47,-126.50)  217.55                80
 01/25/2020   10:10:54   (  -0.04,-128.40) (   0.72,-131.77)  383.71                80
 01/26/2020   09:54:49   (  -0.03,-128.39) (  -0.29,-127.23)  132.40                80
 01/27/2020   22:16:44   (   0.04,-128.39) (  -0.87,-132.54)  472.59                80
 01/28/2020   21:55:19   (   0.04,-128.38) (   0.15,-128.00)   43.36                80
 01/31/2020   09:58:19   (  -0.04,-128.35) (   0.03,-128.73)   42.87                80
 02/01/2020   09:42:14   (  -0.04,-128.34) (  -0.98,-124.20)  472.81                80