Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2018 9 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/17/2018   08:11:44   (   0.35,-104.11) (  -0.14,-101.90)  252.60                80
 09/18/2018   20:33:41   (  -0.33,-104.18) (  -1.02,-107.21)  344.66                80
 09/19/2018   20:17:37   (  -0.34,-104.18) (  -0.03,-102.67)  171.22                80
 09/21/2018   08:39:26   (   0.32,-104.09) (   1.17,-107.95)  439.36                80
 09/22/2018   08:18:02   (   0.32,-104.07) (   0.17,-103.42)   75.02                80
 09/24/2018   20:21:15   (  -0.32,-104.12) (  -0.33,-104.19)    8.61                80
 09/27/2018   08:26:58   (   0.31,-104.04) (   0.53,-104.92)  101.66                80
 09/28/2018   08:05:34   (   0.32,-104.02) (  -0.47,-100.39)  412.83                80
 09/29/2018   20:27:31   (  -0.30,-104.05) (  -0.68,-105.70)  188.65                80
 09/30/2018   20:11:27   (  -0.30,-104.04) (   0.32,-101.17)  327.20                80