Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/25/2021   10:51:53   (  -0.03,-137.23) (   0.88,-141.34)  468.60                80
 01/26/2021   10:30:29   (  -0.03,-137.23) (  -0.14,-136.82)   47.57                80
 01/28/2021   22:33:40   (  -0.01,-137.21) (  -0.08,-137.58)   41.69                80
 01/29/2021   22:17:35   (  -0.00,-137.20) (   0.94,-133.05)  473.85                80
 01/31/2021   10:39:23   (  -0.00,-137.19) (   0.27,-138.31)  127.86                80
 02/01/2021   10:17:58   (  -0.01,-137.18) (  -0.75,-133.78)  387.24                80
 02/02/2021   22:39:54   (   0.01,-137.16) (  -0.42,-139.09)  219.80                80
 02/03/2021   22:23:50   (   0.01,-137.15) (   0.60,-134.56)  295.12                80
 02/05/2021   10:45:37   (  -0.00,-137.13) (   0.61,-139.82)  307.37                80
 02/06/2021   10:24:13   (   0.01,-137.11) (  -0.41,-135.30)  207.10                80