Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 9 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/16/2020   22:46:43   (  -0.04,-137.19) (  -0.82,-140.57)  385.16                80
 09/17/2020   22:30:40   (  -0.04,-137.19) (   0.25,-136.05)  131.15                80
 09/19/2020   10:49:47   (   0.03,-137.19) (   0.98,-141.31)  469.90                80
 09/20/2020   10:33:43   (   0.04,-137.18) (  -0.08,-136.79)   46.08                80
 09/22/2020   22:34:15   (  -0.03,-137.16) (  -0.12,-137.55)   44.37                80
 09/23/2020   22:18:11   (  -0.03,-137.15) (   0.88,-133.02)  470.80                80
 09/25/2020   10:37:19   (   0.03,-137.13) (   0.29,-138.29)  131.99                80
 09/26/2020   10:21:15   (   0.02,-137.12) (  -0.71,-133.76)  382.84                80
 09/27/2020   22:40:32   (  -0.01,-137.10) (  -0.43,-139.07)  224.19                80
 09/28/2020   22:24:27   (  -0.01,-137.08) (   0.58,-134.54)  290.62                80