Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/10/2017   18:39:35   (   0.01, -76.11) (  -0.60, -78.88)  315.62                80
 12/11/2017   18:23:26   (   0.01, -74.79) (   0.15, -74.29)   57.87                80
 12/12/2017   18:04:36   (   0.02, -73.48) (   0.84, -69.68)  431.75                80
 12/14/2017   06:23:36   (  -0.01, -71.44) (   0.74, -74.86)  389.71                80
 12/15/2017   06:04:45   (  -0.00, -70.13) (   0.04, -70.26)   15.43                80
 12/16/2017   05:48:36   (   0.00, -68.82) (  -0.71, -65.67)  358.89                80
 12/17/2017   18:07:44   (  -0.01, -66.84) (  -0.90, -70.88)  460.09                80
 12/18/2017   17:48:55   (  -0.01, -65.53) (  -0.14, -66.29)   85.46                80
 12/19/2017   17:32:44   (  -0.00, -64.22) (   0.55, -61.68)  289.15                80
 12/22/2017   05:32:54   (  -0.00, -60.90) (   0.33, -62.26)  155.89                80