Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 7 15.  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) (   0.62,-139.89)  306.10                80
 07/16/2021   10:24:48   (   0.04,-137.20) (  -0.36,-135.35)  210.52                80
 07/17/2021   22:49:25   (  -0.04,-137.21) (  -0.83,-140.66)  393.74                80
 07/18/2021   22:28:02   (  -0.03,-137.21) (   0.21,-136.13)  122.30                80
 07/20/2021   10:52:31   (   0.03,-137.20) (   0.95,-141.41)  479.18                80
 07/21/2021   10:31:07   (   0.02,-137.20) (  -0.03,-136.87)   36.24                80
 07/23/2021   22:37:00   (   0.00,-137.18) (  -0.12,-137.66)   55.11                80
 07/24/2021   22:15:37   (   0.01,-137.17) (   0.91,-133.13)  459.91                80
 07/26/2021   10:40:06   (  -0.02,-137.15) (   0.24,-138.41)  142.63                80
 07/27/2021   10:21:22   (  -0.02,-137.15) (  -0.74,-133.87)  372.64                80
 07/28/2021   22:40:39   (  -0.00,-137.13) (  -0.45,-139.18)  233.25                80