Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 9 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/07/2021   10:34:13   (   0.04,-137.20) (  -0.04,-136.93)   31.79                80
 09/09/2021   22:34:46   (  -0.04,-137.20) (  -0.14,-137.70)   56.52                80
 09/10/2021   22:18:42   (  -0.04,-137.20) (   0.86,-133.17)  459.63                80
 09/12/2021   10:37:50   (   0.04,-137.20) (   0.32,-138.44)  141.60                80
 09/13/2021   10:21:46   (   0.04,-137.19) (  -0.68,-133.90)  373.84                80
 09/14/2021   22:41:03   (  -0.03,-137.17) (  -0.49,-139.21)  232.83                80
 09/15/2021   22:24:58   (  -0.03,-137.16) (   0.51,-134.68)  282.15                80
 09/17/2021   10:44:07   (   0.02,-137.14) (   0.67,-139.95)  320.56                80
 09/18/2021   10:28:03   (   0.01,-137.13) (  -0.39,-135.43)  194.31                80
 09/19/2021   22:47:20   (  -0.01,-137.11) (  -0.84,-140.72)  412.79                80