Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2018 9 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/21/2018   08:39:26   (   0.32,-104.11) (   1.17,-107.95)  436.80                80
 09/22/2018   08:18:02   (   0.33,-104.10) (   0.18,-103.41)   78.36                80
 09/24/2018   20:21:14   (  -0.32,-104.16) (  -0.34,-104.19)    3.91                80
 09/27/2018   08:26:59   (   0.31,-104.11) (   0.48,-104.93)   94.12                80
 09/28/2018   08:05:35   (   0.32,-104.09) (  -0.51,-100.40)  421.10                80
 09/29/2018   20:27:32   (  -0.30,-104.13) (  -0.64,-105.71)  179.39                80
 09/30/2018   20:11:28   (  -0.31,-104.13) (   0.36,-101.18)  337.28                80
 10/02/2018   08:33:17   (   0.28,-104.09) (   0.78,-106.45)  268.27                80
 10/03/2018   08:11:52   (   0.29,-104.08) (  -0.22,-101.92)  246.54                80