Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/30/2019   22:46:55   (   0.02,-137.20) (  -0.77,-140.60)  387.50                80
 10/01/2019   22:30:50   (   0.02,-137.20) (   0.27,-136.07)  128.41                80
 10/03/2019   10:52:37   (   0.01,-137.20) (   0.93,-141.34)  471.84                80
 10/04/2019   10:31:13   (   0.01,-137.19) (  -0.10,-136.81)   43.78                80
 10/06/2019   22:37:04   (  -0.00,-137.16) (  -0.08,-137.59)   47.82                80
 10/07/2019   22:15:38   (  -0.00,-137.15) (   0.90,-133.05)  467.36                80
 10/09/2019   10:40:07   (   0.00,-137.14) (   0.24,-138.33)  134.60                80
 10/10/2019   10:18:41   (   0.00,-137.13) (  -0.74,-133.79)  380.43                80
 10/11/2019   22:43:16   (  -0.02,-137.11) (  -0.48,-139.09)  226.63                80
 10/12/2019   22:24:32   (  -0.03,-137.09) (   0.56,-134.57)  288.30                80
 10/14/2019   10:43:39   (   0.03,-137.08) (   0.64,-139.84)  314.52                80