Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 9 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/06/2020   22:34:11   (  -0.06,-137.21) (  -0.11,-137.56)   39.02                80
 09/07/2020   22:18:06   (  -0.06,-137.23) (   0.89,-133.02)  479.13                80
 09/09/2020   10:39:55   (   0.05,-137.23) (   0.28,-138.29)  120.40                80
 09/10/2020   10:18:30   (   0.05,-137.24) (  -0.72,-133.76)  396.96                80
 09/11/2020   22:40:27   (  -0.05,-137.27) (  -0.44,-139.07)  205.46                80
 09/12/2020   22:24:23   (  -0.04,-137.27) (   0.57,-134.54)  311.46                80
 09/14/2020   10:46:11   (   0.03,-137.27) (   0.61,-139.81)  289.61                80
 09/15/2020   10:24:47   (   0.03,-137.27) (  -0.40,-135.28)  226.83                80
 09/16/2020   22:46:44   (  -0.02,-137.28) (  -0.76,-140.59)  376.94                80
 09/17/2020   22:30:40   (  -0.02,-137.28) (   0.25,-136.05)  139.43                80