Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 9 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/12/2020   22:24:22   (  -0.05,-137.20) (   0.54,-134.53)  303.69                80
 09/14/2020   10:43:31   (   0.04,-137.19) (   0.63,-139.80)  297.21                80
 09/15/2020   10:27:26   (   0.03,-137.19) (  -0.37,-135.27)  218.92                80
 09/16/2020   22:46:44   (  -0.03,-137.19) (  -0.78,-140.58)  386.03                80
 09/17/2020   22:30:39   (  -0.03,-137.19) (   0.22,-136.04)  129.96                80
 09/19/2020   10:49:47   (   0.03,-137.18) (   0.95,-141.31)  471.65                80
 09/20/2020   10:33:43   (   0.03,-137.17) (  -0.06,-136.78)   43.93                80
 09/22/2020   22:34:15   (  -0.03,-137.14) (  -0.14,-137.55)   47.08                80
 09/23/2020   22:18:10   (  -0.03,-137.13) (   0.87,-133.02)  467.87                80
 09/25/2020   10:37:19   (   0.02,-137.10) (   0.31,-138.29)  135.55                80
 09/26/2020   10:21:15   (   0.01,-137.09) (  -0.76,-133.77)  379.02                80