Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 12 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/27/2019   21:58:23   (   0.03,-128.19) (   0.07,-128.07)   13.64                80
 12/30/2019   09:58:45   (  -0.04,-128.27) (   0.06,-128.81)   60.93                80
 12/31/2019   09:42:40   (  -0.03,-128.29) (  -0.95,-124.28)  458.21                80
 01/01/2020   22:01:55   (   0.04,-128.29) (  -0.24,-129.58)  146.38                80
 01/02/2020   21:45:50   (   0.04,-128.31) (   0.77,-125.04)  372.39                80
 01/04/2020   10:04:57   (  -0.05,-128.37) (   0.37,-130.32)  221.91                80
 01/05/2020   09:48:51   (  -0.04,-128.38) (  -0.64,-125.78)  296.74                80
 01/06/2020   22:08:07   (   0.05,-128.37) (  -0.54,-131.09)  308.33                80
 01/07/2020   21:52:01   (   0.04,-128.39) (   0.47,-126.55)  209.72                80
 01/09/2020   10:11:08   (  -0.04,-128.43) (   0.73,-131.81)  386.23                80