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) (  -0.11,-137.63)   50.45                80
 07/08/2021   22:15:25   (  -0.01,-137.18) (   0.92,-133.10)  465.73                80
 07/10/2021   10:39:54   (   0.01,-137.19) (   0.30,-138.37)  134.97                80
 07/11/2021   10:18:30   (   0.00,-137.18) (  -0.74,-133.84)  380.86                80
 07/12/2021   22:43:07   (  -0.01,-137.18) (  -0.45,-139.15)  224.69                80
 07/13/2021   22:21:44   (  -0.01,-137.17) (   0.58,-134.62)  291.02                80
 07/15/2021   10:46:12   (   0.02,-137.17) (   0.64,-139.89)  310.36                80
 07/16/2021   10:24:49   (   0.02,-137.16) (  -0.40,-135.36)  204.96                80
 07/17/2021   22:49:26   (  -0.01,-137.14) (  -0.79,-140.67)  401.80                80
 07/18/2021   22:28:02   (  -0.01,-137.13) (   0.19,-136.13)  112.84                80