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   20:10:52   (   0.00,-104.33) (   0.66,-101.28)  346.71                80
 06/20/2021   08:30:01   (  -0.04,-104.10) (   0.51,-106.55)  280.01                80
 06/21/2021   08:13:57   (  -0.02,-104.10) (  -0.47,-102.02)  236.60                80
 06/22/2021   20:33:16   (   0.06,-104.33) (  -0.62,-107.35)  343.96                80
 06/23/2021   20:17:12   (   0.05,-104.33) (   0.36,-102.81)  172.26                80
 06/25/2021   08:36:21   (  -0.08,-104.09) (   0.81,-108.09)  455.39                80
 06/26/2021   08:20:17   (  -0.07,-104.09) (  -0.16,-103.55)   61.07                80
 06/28/2021   20:20:52   (   0.08,-104.32) (   0.06,-104.34)    2.83                80
 07/01/2021   08:23:56   (  -0.10,-104.10) (   0.13,-105.08)  112.33                80
 07/02/2021   08:07:53   (  -0.08,-104.10) (  -0.90,-100.56)  404.68                80