Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2021 4 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/09/2021   20:20:11   (  -0.15,-104.31) (  -0.12,-104.21)   11.46                80
 04/12/2021   08:23:13   (   0.15,-104.30) (   0.29,-104.94)   72.42                80
 04/13/2021   08:07:08   (   0.15,-104.31) (  -0.70,-100.40)  444.83                80
 04/14/2021   20:29:04   (  -0.15,-104.32) (  -0.46,-105.71)  158.42                80
 04/15/2021   20:07:39   (  -0.15,-104.31) (   0.53,-101.17)  357.13                80
 04/17/2021   08:29:26   (   0.15,-104.28) (   0.62,-106.44)  245.52                80
 04/18/2021   08:13:20   (   0.15,-104.29) (  -0.37,-101.90)  271.53                80
 04/19/2021   20:35:17   (  -0.15,-104.32) (  -0.78,-107.21)  329.39                80
 04/20/2021   20:13:51   (  -0.16,-104.30) (   0.21,-102.67)  186.09                80
 04/22/2021   08:35:38   (   0.16,-104.25) (   1.00,-107.93)  419.45                80