Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2021 6 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/18/2021   20:10:53   (   0.00,-104.32) (   0.69,-101.28)  346.64                80
 06/20/2021   08:30:02   (  -0.04,-104.10) (   0.48,-106.56)  280.13                80
 06/21/2021   08:13:57   (  -0.02,-104.10) (  -0.49,-102.02)  236.43                80
 06/22/2021   20:33:17   (   0.06,-104.33) (  -0.59,-107.35)  344.25                80
 06/23/2021   20:17:12   (   0.05,-104.32) (   0.38,-102.82)  171.88                80
 06/25/2021   08:36:22   (  -0.08,-104.09) (   0.79,-108.09)  455.81                80
 06/26/2021   08:20:17   (  -0.07,-104.08) (  -0.18,-103.55)   60.53                80
 06/28/2021   20:23:32   (   0.08,-104.32) (   0.08,-104.35)    3.17                80
 07/01/2021   08:23:57   (  -0.10,-104.09) (   0.11,-105.09)  113.11                80