Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2018 7 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)
 07/21/2018   20:39:31   (   0.24,-104.53) (  -0.72,-108.79)  485.21                80
 07/22/2018   20:23:27   (   0.23,-104.54) (   0.32,-104.26)   32.11                80
 07/25/2018   08:23:51   (  -0.25,-104.40) (  -0.10,-104.99)   68.28                80
 07/26/2018   08:07:48   (  -0.24,-104.40) (  -1.14,-100.47)  448.71                80
 07/27/2018   20:27:06   (   0.27,-104.56) (  -0.01,-105.78)  139.17                80
 07/28/2018   20:11:02   (   0.26,-104.57) (   1.03,-101.26)  378.15                80
 07/30/2018   08:30:11   (  -0.29,-104.43) (   0.17,-106.53)  238.55                80
 07/31/2018   08:14:06   (  -0.27,-104.44) (  -0.81,-101.99)  278.57                80
 08/01/2018   20:33:24   (   0.30,-104.60) (  -0.34,-107.31)  309.62                80
 08/02/2018   20:17:21   (   0.29,-104.61) (   0.70,-102.78)  207.84                80
 08/04/2018   08:36:29   (  -0.31,-104.47) (   0.50,-108.05)  408.22                80