Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 1 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)
 01/31/2020   09:58:31   (  -0.04,-128.24) (   0.05,-128.77)   60.08                80
 02/01/2020   09:42:26   (  -0.04,-128.22) (  -0.94,-124.24)  453.67                80
 02/02/2020   22:04:23   (   0.03,-128.18) (  -0.28,-129.54)  154.67                80
 02/03/2020   21:42:58   (   0.03,-128.16) (   0.72,-125.01)  358.47                80
 02/05/2020   10:04:46   (  -0.03,-128.10) (   0.47,-130.28)  248.32                80
 02/06/2020   09:48:42   (  -0.02,-128.07) (  -0.53,-125.75)  264.45                80
 02/07/2020   22:10:38   (  -0.02,-128.03) (  -0.69,-131.05)  344.13                80
 02/08/2020   21:49:14   (  -0.01,-127.99) (   0.31,-126.51)  167.98                80
 02/10/2020   10:11:02   (   0.01,-127.92) (   0.88,-131.78)  440.34                80
 02/11/2020   09:54:58   (   0.01,-127.88) (  -0.12,-127.25)   71.78                80