Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2021 9 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/10/2021   20:33:59   (  -0.39,-104.28) (  -1.05,-107.37)  350.94                80
 09/11/2021   20:17:55   (  -0.39,-104.29) (  -0.05,-102.83)  166.32                80
 09/13/2021   08:39:42   (   0.38,-104.20) (   1.28,-108.09)  444.44                80
 09/14/2021   08:18:19   (   0.38,-104.18) (   0.22,-103.57)   70.27                80
 09/16/2021   20:21:32   (  -0.37,-104.26) (  -0.39,-104.34)    9.73                80
 09/19/2021   08:27:15   (   0.36,-104.19) (   0.57,-105.08)  101.23                80
 09/20/2021   08:05:51   (   0.36,-104.18) (  -0.44,-100.55)  414.08                80
 09/21/2021   20:27:48   (  -0.35,-104.25) (  -0.72,-105.86)  183.83                80
 09/22/2021   20:11:44   (  -0.36,-104.26) (   0.28,-101.32)  334.08                80