Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 7 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/07/2021   22:36:49   (  -0.02,-137.18) (  -0.12,-137.62)   50.60                80
 07/08/2021   22:15:25   (  -0.02,-137.18) (   0.92,-133.10)  465.49                80
 07/10/2021   10:39:53   (   0.01,-137.18) (   0.30,-138.36)  135.33                80
 07/11/2021   10:18:30   (   0.01,-137.18) (  -0.74,-133.84)  380.42                80
 07/12/2021   22:43:07   (  -0.01,-137.17) (  -0.45,-139.15)  225.25                80
 07/13/2021   22:21:44   (  -0.01,-137.16) (   0.58,-134.62)  290.40                80
 07/15/2021   10:46:12   (   0.02,-137.16) (   0.63,-139.89)  311.12                80
 07/16/2021   10:24:49   (   0.02,-137.15) (  -0.41,-135.36)  204.12                80
 07/17/2021   22:49:26   (  -0.02,-137.13) (  -0.78,-140.67)  402.80                80
 07/18/2021   22:28:02   (  -0.01,-137.12) (   0.20,-136.13)  111.74                80
 07/20/2021   10:52:31   (  -0.01,-137.09) (   0.96,-141.41)  491.88                80