Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/11/2017   18:23:26   (   0.01, -74.79) (   0.13, -74.28)   57.86                80
 12/12/2017   18:04:36   (   0.01, -73.47) (   0.88, -69.69)  431.67                80
 12/14/2017   06:23:35   (   0.00, -71.43) (   0.76, -74.86)  390.22                80
 12/15/2017   06:04:45   (   0.01, -70.12) (   0.07, -70.25)   16.25                80
 12/16/2017   05:48:35   (   0.01, -68.81) (  -0.69, -65.66)  358.17                80
 12/17/2017   18:07:44   (  -0.01, -66.83) (  -0.93, -70.87)  460.73                80
 12/18/2017   17:48:54   (  -0.01, -65.52) (  -0.17, -66.28)   86.19                80
 12/19/2017   17:32:45   (  -0.01, -64.21) (   0.58, -61.69)  288.23                80
 12/22/2017   05:32:55   (   0.00, -60.88) (   0.30, -62.27)  157.51                80
 12/23/2017   05:16:45   (  -0.00, -59.58) (  -0.45, -57.68)  217.39                80