Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 9.  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, -76.10) (  -0.64, -78.87)  315.67                80
 12/11/2017   18:23:25   (   0.01, -74.79) (   0.11, -74.28)   57.71                80
 12/12/2017   18:04:36   (   0.01, -73.47) (   0.87, -69.69)  431.54                80
 12/14/2017   06:23:35   (  -0.00, -71.43) (   0.77, -74.85)  390.12                80
 12/15/2017   06:04:46   (   0.00, -70.12) (   0.02, -70.26)   15.91                80
 12/16/2017   05:48:35   (   0.01, -68.81) (  -0.68, -65.66)  358.31                80
 12/17/2017   18:07:44   (  -0.01, -66.83) (  -0.94, -70.87)  460.72                80
 12/18/2017   17:48:54   (  -0.01, -65.52) (  -0.18, -66.28)   86.12                80
 12/19/2017   17:32:45   (  -0.00, -64.22) (   0.57, -61.69)  288.33                80
 12/22/2017   05:32:54   (   0.00, -60.89) (   0.31, -62.26)  157.04                80
 12/23/2017   05:16:45   (  -0.00, -59.58) (  -0.45, -57.67)  217.89                80