Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 2 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/13/2020   21:58:18   (   0.36,-128.35) (   0.41,-128.13)   25.52                80
 02/16/2020   09:58:42   (  -0.36,-128.38) (  -0.23,-128.87)   56.96                80
 02/17/2020   09:42:38   (  -0.35,-128.39) (  -1.29,-124.35)  460.96                80
 02/18/2020   22:01:55   (   0.36,-128.43) (   0.07,-129.65)  139.93                80
 02/19/2020   21:45:50   (   0.35,-128.44) (   1.08,-125.12)  377.82                80
 02/21/2020   10:05:00   (  -0.36,-128.44) (   0.05,-130.40)  223.30                80
 02/22/2020   09:48:55   (  -0.35,-128.45) (  -0.95,-125.87)  294.17                80
 02/23/2020   22:08:11   (   0.36,-128.48) (  -0.26,-131.17)  307.32                80
 02/24/2020   21:52:07   (   0.36,-128.49) (   0.75,-126.64)  210.14                80
 02/26/2020   10:13:55   (  -0.36,-128.49) (   0.43,-131.91)  390.94                80
 02/27/2020   09:52:32   (  -0.36,-128.49) (  -0.63,-127.39)  126.15                80