Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2018 9 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/19/2018   20:17:37   (  -0.34,-104.18) (  -0.01,-102.67)  171.82                80
 09/21/2018   08:39:25   (   0.32,-104.06) (   1.21,-107.94)  442.48                80
 09/22/2018   08:18:01   (   0.33,-104.02) (   0.22,-103.40)   69.93                80
 09/24/2018   20:21:14   (  -0.32,-104.03) (  -0.38,-104.18)   18.49                80
 09/25/2018   20:05:10   (  -0.32,-104.00) (   0.68, -99.66)  495.95                80
 09/27/2018   08:26:59   (   0.31,-103.90) (   0.52,-104.92)  116.88                80
 09/28/2018   08:05:34   (   0.32,-103.86) (  -0.48,-100.39)  395.54                80
 09/29/2018   20:27:30   (  -0.30,-103.86) (  -0.74,-105.69)  208.58                80
 09/30/2018   20:11:27   (  -0.31,-103.84) (   0.32,-101.17)  305.31                80
 10/02/2018   08:33:15   (   0.28,-103.75) (   0.88,-106.43)  305.20                80
 10/03/2018   08:11:51   (   0.29,-103.71) (  -0.12,-101.90)  206.76                80