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

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/13/2017   06:42:34   (   0.01, -75.21) (   0.98, -79.56)  496.82                80
 12/14/2017   06:26:28   (   0.01, -75.21) (  -0.01, -75.03)   20.26                80
 12/16/2017   18:29:39   (  -0.02, -75.26) (  -0.15, -75.80)   62.26                80
 12/17/2017   18:08:15   (  -0.02, -75.26) (   0.90, -71.28)  454.89                80
 12/19/2017   06:30:01   (   0.02, -75.24) (   0.33, -76.53)  148.38                80
 12/20/2017   06:13:57   (   0.03, -75.25) (  -0.72, -72.01)  369.19                80
 12/21/2017   18:35:52   (  -0.03, -75.30) (  -0.48, -77.31)  229.03                80
 12/22/2017   18:14:26   (  -0.03, -75.31) (   0.51, -72.77)  288.67                80
 12/24/2017   06:38:54   (   0.03, -75.29) (   0.66, -78.04)  313.93                80
 12/25/2017   06:17:29   (   0.03, -75.31) (  -0.39, -73.52)  204.24                80
 12/26/2017   18:42:05   (  -0.04, -75.37) (  -0.80, -78.82)  392.68                80