Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2017 12 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/16/2017   18:29:39   (  -0.02, -75.23) (  -0.14, -75.80)   65.70                80
 12/17/2017   18:08:14   (  -0.02, -75.22) (   0.85, -71.27)  450.71                80
 12/19/2017   06:30:01   (   0.02, -75.18) (   0.32, -76.54)  154.04                80
 12/20/2017   06:13:56   (   0.02, -75.19) (  -0.67, -72.00)  362.75                80
 12/21/2017   18:35:52   (  -0.01, -75.24) (  -0.47, -77.31)  236.30                80
 12/22/2017   18:14:27   (  -0.01, -75.24) (   0.52, -72.77)  280.60                80
 12/24/2017   06:38:54   (   0.01, -75.21) (   0.65, -78.04)  323.53                80
 12/25/2017   06:17:29   (   0.00, -75.22) (  -0.40, -73.52)  193.88                80
 12/26/2017   18:42:05   (  -0.01, -75.28) (  -0.79, -78.82)  403.77                80
 12/27/2017   18:20:39   (  -0.00, -75.29) (   0.20, -74.28)  113.80                80