Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 12 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/05/2019   22:08:27   (  -0.00,-128.24) (  -0.63,-131.12)  328.14                80
 12/06/2019   21:52:22   (  -0.01,-128.22) (   0.36,-126.59)  186.21                80
 12/08/2019   10:11:28   (  -0.01,-128.22) (   0.83,-131.85)  414.81                80
 12/09/2019   09:55:23   (   0.00,-128.19) (  -0.16,-127.31)   99.22                80
 12/11/2019   21:58:34   (   0.00,-128.08) (   0.02,-128.09)    2.55                80
 12/14/2019   09:58:54   (  -0.01,-128.03) (   0.17,-128.82)   89.96                80
 12/15/2019   09:42:49   (   0.00,-127.99) (  -0.83,-124.28)  422.83                80
 12/16/2019   22:02:04   (   0.02,-127.90) (  -0.37,-129.58)  192.10                80
 12/17/2019   21:45:59   (   0.01,-127.86) (   0.64,-125.05)  320.47                80
 12/19/2019   10:05:06   (  -0.03,-127.83) (   0.50,-130.32)  282.96                80