Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2018 9 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/18/2018   20:33:41   (  -0.33,-104.18) (  -1.04,-107.20)  344.53                80
 09/19/2018   20:17:38   (  -0.34,-104.18) (   0.02,-102.68)  171.32                80
 09/21/2018   08:39:26   (   0.32,-104.09) (   1.18,-107.95)  439.37                80
 09/22/2018   08:18:01   (   0.32,-104.07) (   0.18,-103.41)   74.96                80
 09/24/2018   20:21:14   (  -0.32,-104.11) (  -0.34,-104.19)    8.76                80
 09/27/2018   08:26:59   (   0.31,-104.04) (   0.48,-104.93)  101.85                80
 09/28/2018   08:05:35   (   0.32,-104.01) (  -0.51,-100.40)  412.59                80
 09/29/2018   20:27:31   (  -0.30,-104.05) (  -0.70,-105.70)  188.91                80
 09/30/2018   20:11:27   (  -0.30,-104.04) (   0.36,-101.18)  326.93                80
 10/02/2018   08:33:16   (   0.28,-103.98) (   0.83,-106.44)  280.22                80