Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 12 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/11/2019   21:58:33   (   0.00,-128.08) (   0.01,-128.09)    0.42                80
 12/14/2019   09:58:54   (  -0.01,-128.03) (   0.19,-128.81)   89.52                80
 12/15/2019   09:42:49   (   0.00,-128.00) (  -0.81,-124.28)  423.36                80
 12/16/2019   22:02:04   (   0.02,-127.91) (  -0.39,-129.58)  191.16                80
 12/17/2019   21:45:58   (   0.01,-127.87) (   0.62,-125.04)  321.55                80
 12/19/2019   10:05:06   (  -0.03,-127.84) (   0.52,-130.32)  282.03                80
 12/20/2019   09:49:00   (  -0.02,-127.80) (  -0.48,-125.78)  230.46                80
 12/21/2019   22:08:16   (   0.03,-127.71) (  -0.71,-131.08)  384.55                80
 12/22/2019   21:52:10   (   0.02,-127.66) (   0.29,-126.55)  127.76                80