Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 6 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/29/2021   10:46:00   (   0.03,-137.19) (   0.61,-139.86)  303.54                80
 06/30/2021   10:24:37   (   0.02,-137.19) (  -0.42,-135.33)  212.28                80
 07/01/2021   22:49:14   (  -0.03,-137.18) (  -0.78,-140.64)  393.10                80
 07/02/2021   22:27:50   (  -0.02,-137.18) (   0.20,-136.10)  122.53                80
 07/04/2021   10:52:19   (   0.02,-137.17) (   0.96,-141.38)  479.26                80
 07/05/2021   10:30:55   (   0.01,-137.16) (  -0.07,-136.85)   35.79                80
 07/07/2021   22:34:09   (   0.00,-137.13) (  -0.08,-137.63)   56.73                80
 07/08/2021   22:18:05   (   0.01,-137.12) (   0.90,-133.10)  457.75                80
 07/10/2021   10:39:54   (  -0.01,-137.09) (   0.27,-138.37)  145.78                80
 07/11/2021   10:18:30   (  -0.01,-137.07) (  -0.71,-133.84)  368.31                80
 07/12/2021   22:40:27   (   0.01,-137.04) (  -0.47,-139.14)  240.06                80