Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2021 6 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)
 06/09/2021   08:36:07   (   0.01,-104.11) (   0.87,-108.03)  446.65                80
 06/10/2021   08:20:02   (   0.02,-104.11) (  -0.12,-103.50)   69.88                80
 06/12/2021   20:20:36   (  -0.01,-104.32) (  -0.02,-104.28)    4.76                80
 06/15/2021   08:23:41   (  -0.00,-104.09) (   0.19,-105.02)  105.94                80
 06/16/2021   08:07:37   (   0.01,-104.09) (  -0.80,-100.49)  410.62                80
 06/17/2021   20:26:55   (   0.02,-104.31) (  -0.32,-105.81)  170.64                80
 06/18/2021   20:10:50   (  -0.00,-104.31) (   0.67,-101.27)  345.57                80
 06/20/2021   08:29:59   (  -0.03,-104.08) (   0.55,-106.54)  281.44                80
 06/21/2021   08:13:55   (  -0.02,-104.07) (  -0.50,-102.02)  234.91                80
 06/22/2021   20:33:14   (   0.06,-104.30) (  -0.61,-107.34)  346.21                80