Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 1 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/18/2019   09:49:32   (  -0.05,-128.13) (  -0.54,-125.90)  253.86                80
 01/19/2019   22:08:47   (   0.06,-127.97) (  -0.67,-131.20)  367.65                80
 01/20/2019   21:52:42   (   0.05,-127.94) (   0.32,-126.66)  144.96                80
 01/22/2019   10:11:50   (  -0.06,-127.98) (   0.81,-131.94)  450.97                80
 01/23/2019   09:55:45   (  -0.05,-127.94) (  -0.17,-127.40)   61.36                80
 01/25/2019   21:56:15   (   0.06,-127.74) (  -0.05,-128.16)   48.61                80
 01/26/2019   21:40:10   (   0.05,-127.70) (   0.99,-123.64)  463.61                80
 01/28/2019   09:59:17   (  -0.06,-127.74) (   0.19,-128.90)  132.72                80
 01/29/2019   09:43:12   (  -0.05,-127.70) (  -0.79,-124.37)  379.31                80
 01/30/2019   22:02:27   (   0.05,-127.53) (  -0.41,-129.66)  243.36                80