Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 7 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/15/2021   10:46:12   (   0.04,-137.20) (   0.63,-139.89)  306.23                80
 07/16/2021   10:24:48   (   0.03,-137.20) (  -0.35,-135.35)  210.42                80
 07/17/2021   22:49:25   (  -0.03,-137.21) (  -0.84,-140.66)  393.89                80
 07/18/2021   22:28:02   (  -0.03,-137.21) (   0.20,-136.13)  122.18                80
 07/20/2021   10:52:31   (   0.02,-137.20) (   0.95,-141.41)  479.32                80
 07/21/2021   10:31:06   (   0.01,-137.20) (  -0.03,-136.87)   36.12                80
 07/23/2021   22:34:20   (   0.02,-137.18) (  -0.11,-137.66)   55.37                80
 07/24/2021   22:18:17   (   0.02,-137.17) (   0.93,-133.14)  459.91                80
 07/26/2021   10:37:25   (  -0.02,-137.16) (   0.28,-138.40)  142.33                80
 07/27/2021   10:21:22   (  -0.01,-137.15) (  -0.76,-133.88)  372.95                80