Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 1 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/23/2020   21:49:09   (   0.03,-128.41) (   0.45,-126.51)  216.40                80
 01/25/2020   10:10:58   (  -0.04,-128.39) (   0.74,-131.78)  386.30                80
 01/26/2020   09:54:54   (  -0.04,-128.38) (  -0.31,-127.26)  129.08                80
 01/27/2020   22:16:50   (   0.04,-128.38) (  -0.92,-132.55)  476.83                80
 01/28/2020   21:55:27   (   0.04,-128.37) (   0.14,-128.04)   38.34                80
 01/31/2020   09:58:31   (  -0.04,-128.33) (   0.06,-128.77)   50.07                80
 02/01/2020   09:42:26   (  -0.04,-128.32) (  -0.93,-124.24)  464.81                80
 02/02/2020   22:04:24   (   0.03,-128.30) (  -0.23,-129.55)  141.76                80
 02/03/2020   21:42:59   (   0.03,-128.29) (   0.77,-125.02)  372.58                80
 02/05/2020   10:04:47   (  -0.03,-128.25) (   0.43,-130.29)  232.29                80