Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 1 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/01/2020   09:42:26   (  -0.04,-128.22) (  -0.95,-124.24)  453.72                80
 02/02/2020   22:04:23   (   0.03,-128.18) (  -0.27,-129.54)  154.63                80
 02/03/2020   21:42:58   (   0.03,-128.16) (   0.73,-125.01)  358.53                80
 02/05/2020   10:04:47   (  -0.03,-128.10) (   0.47,-130.28)  248.17                80
 02/06/2020   09:48:42   (  -0.02,-128.07) (  -0.53,-125.75)  264.61                80
 02/07/2020   22:10:38   (  -0.01,-128.03) (  -0.68,-131.05)  344.01                80
 02/08/2020   21:49:14   (  -0.01,-127.99) (   0.32,-126.51)  168.13                80
 02/10/2020   10:11:02   (   0.01,-127.92) (   0.87,-131.78)  440.05                80
 02/11/2020   09:54:58   (   0.01,-127.89) (  -0.13,-127.25)   72.06                80
 02/13/2020   21:58:10   (  -0.00,-127.80) (  -0.08,-128.02)   26.22                80