Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2018 9 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/22/2018   08:18:02   (   0.33,-104.10) (   0.17,-103.41)   78.42                80
 09/24/2018   20:21:14   (  -0.32,-104.17) (  -0.34,-104.19)    3.40                80
 09/27/2018   08:26:59   (   0.31,-104.11) (   0.48,-104.93)   93.85                80
 09/28/2018   08:05:35   (   0.32,-104.09) (  -0.52,-100.40)  421.41                80
 09/29/2018   20:27:32   (  -0.30,-104.14) (  -0.64,-105.71)  178.82                80
 09/30/2018   20:11:28   (  -0.31,-104.14) (   0.36,-101.18)  337.89                80
 10/02/2018   08:33:16   (   0.28,-104.10) (   0.83,-106.44)  267.78                80
 10/03/2018   08:11:51   (   0.29,-104.08) (  -0.16,-101.91)  247.06                80
 10/04/2018   20:33:49   (  -0.27,-104.09) (  -0.99,-107.22)  356.82                80