Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2021 4 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/19/2021   20:35:17   (  -0.15,-104.31) (  -0.78,-107.21)  330.00                80
 04/20/2021   20:13:51   (  -0.15,-104.30) (   0.22,-102.67)  185.52                80
 04/22/2021   08:35:38   (   0.15,-104.25) (   0.99,-107.93)  419.81                80
 04/23/2021   08:19:32   (   0.16,-104.25) (  -0.01,-103.39)   97.34                80
 04/25/2021   20:20:03   (  -0.16,-104.29) (  -0.15,-104.16)   14.77                80
 04/28/2021   08:23:05   (   0.15,-104.22) (   0.30,-104.90)   76.58                80
 04/29/2021   08:06:59   (   0.16,-104.22) (  -0.70,-100.36)  440.28                80
 04/30/2021   20:28:56   (  -0.15,-104.28) (  -0.45,-105.67)  157.54                80
 05/01/2021   20:07:30   (  -0.16,-104.27) (   0.55,-101.13)  357.85                80