Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2021 4 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)
 04/18/2021   08:13:20   (   0.15,-104.28) (  -0.36,-101.90)  271.15                80
 04/19/2021   20:35:16   (  -0.15,-104.31) (  -0.80,-107.20)  330.07                80
 04/20/2021   20:13:51   (  -0.15,-104.30) (   0.19,-102.67)  185.40                80
 04/22/2021   08:35:38   (   0.15,-104.25) (   0.96,-107.94)  419.99                80
 04/23/2021   08:19:33   (   0.16,-104.25) (  -0.04,-103.40)   97.08                80
 04/25/2021   20:20:04   (  -0.16,-104.29) (  -0.12,-104.17)   14.20                80
 04/28/2021   08:23:04   (   0.15,-104.22) (   0.33,-104.89)   77.08                80
 04/29/2021   08:07:00   (   0.16,-104.22) (  -0.73,-100.37)  439.78                80
 04/30/2021   20:28:55   (  -0.15,-104.28) (  -0.48,-105.66)  158.14                80
 05/01/2021   20:07:30   (  -0.16,-104.26) (   0.52,-101.12)  357.21                80