Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 12 10.  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   21:58:34   (   0.00,-128.09) (   0.03,-128.09)    2.74                80
 12/14/2019   09:58:54   (  -0.01,-128.03) (   0.17,-128.82)   89.33                80
 12/15/2019   09:42:49   (   0.00,-128.00) (  -0.83,-124.28)  423.56                80
 12/16/2019   22:02:04   (   0.02,-127.91) (  -0.37,-129.58)  190.70                80
 12/17/2019   21:45:59   (   0.01,-127.87) (   0.63,-125.05)  322.01                80
 12/19/2019   10:05:06   (  -0.03,-127.85) (   0.51,-130.32)  281.63                80
 12/20/2019   09:49:01   (  -0.02,-127.81) (  -0.50,-125.79)  230.91                80
 12/21/2019   22:08:16   (   0.03,-127.71) (  -0.70,-131.09)  383.92                80
 12/22/2019   21:52:10   (   0.02,-127.67) (   0.25,-126.54)  128.47                80
 12/24/2019   10:11:17   (  -0.03,-127.64) (   0.89,-131.81)  475.77                80