Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 9 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/09/2020   10:39:54   (   0.06,-137.18) (   0.32,-138.28)  125.91                80
 09/10/2020   10:18:29   (   0.05,-137.19) (  -0.69,-133.75)  390.95                80
 09/11/2020   22:40:27   (  -0.05,-137.19) (  -0.48,-139.06)  213.49                80
 09/12/2020   22:24:22   (  -0.04,-137.19) (   0.53,-134.53)  302.88                80
 09/14/2020   10:43:31   (   0.04,-137.19) (   0.64,-139.80)  297.89                80
 09/15/2020   10:27:27   (   0.03,-137.19) (  -0.42,-135.28)  218.06                80
 09/16/2020   22:46:43   (  -0.02,-137.18) (  -0.79,-140.58)  387.62                80
 09/17/2020   22:30:39   (  -0.03,-137.17) (   0.21,-136.04)  128.20                80
 09/19/2020   10:49:47   (   0.02,-137.16) (   0.96,-141.31)  473.25                80
 09/20/2020   10:33:43   (   0.03,-137.15) (  -0.04,-136.78)   42.17                80