Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2021 6 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/16/2021   08:07:38   (   0.01,-104.10) (  -0.82,-100.50)  410.97                80
 06/17/2021   20:26:56   (   0.02,-104.32) (  -0.32,-105.81)  170.02                80
 06/18/2021   20:10:53   (   0.00,-104.32) (   0.71,-101.29)  346.32                80
 06/20/2021   08:30:01   (  -0.04,-104.09) (   0.52,-106.55)  280.57                80
 06/21/2021   08:13:58   (  -0.02,-104.09) (  -0.51,-102.03)  235.88                80
 06/22/2021   20:33:16   (   0.06,-104.32) (  -0.63,-107.34)  345.02                80
 06/23/2021   20:17:13   (   0.05,-104.32) (   0.40,-102.82)  171.01                80
 06/25/2021   08:36:21   (  -0.08,-104.08) (   0.83,-108.08)  456.86                80
 06/26/2021   08:20:17   (  -0.07,-104.07) (  -0.21,-103.56)   59.43                80
 06/28/2021   20:20:51   (   0.08,-104.31) (   0.05,-104.34)    4.83                80