Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 9 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/27/2020   22:40:29   (  -0.04,-137.20) (  -0.46,-139.06)  212.84                80
 09/28/2020   22:24:25   (  -0.04,-137.19) (   0.58,-134.54)  303.10                80
 09/30/2020   10:43:32   (   0.03,-137.20) (   0.60,-139.81)  297.52                80
 10/01/2020   10:27:27   (   0.03,-137.19) (  -0.38,-135.27)  218.28                80
 10/02/2020   22:46:43   (  -0.03,-137.17) (  -0.77,-140.59)  388.61                80
 10/03/2020   22:30:38   (  -0.03,-137.16) (   0.22,-136.05)  126.90                80
 10/05/2020   10:49:45   (   0.03,-137.16) (   0.96,-141.32)  474.64                80
 10/06/2020   10:33:39   (   0.03,-137.14) (  -0.02,-136.78)   40.42                80
 10/08/2020   22:34:10   (  -0.03,-137.09) (  -0.14,-137.56)   53.74                80
 10/09/2020   22:18:05   (  -0.03,-137.07) (   0.85,-133.02)  460.41                80