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

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/17/2021   22:39:55   (   0.01,-137.22) (  -0.39,-139.09)  212.60                80
 01/18/2021   22:23:50   (   0.01,-137.22) (   0.63,-134.56)  303.98                80
 01/20/2021   10:45:38   (  -0.01,-137.22) (   0.58,-139.82)  296.90                80
 01/21/2021   10:24:13   (  -0.01,-137.22) (  -0.44,-135.29)  219.19                80
 01/22/2021   22:46:09   (   0.01,-137.21) (  -0.75,-140.60)  385.93                80
 01/23/2021   22:30:05   (   0.02,-137.21) (   0.27,-136.07)  129.73                80
 01/25/2021   10:51:53   (  -0.02,-137.19) (   0.88,-141.34)  472.55                80
 01/26/2021   10:30:28   (  -0.02,-137.18) (  -0.08,-136.80)   42.58                80
 01/28/2021   22:33:40   (   0.03,-137.15) (  -0.07,-137.58)   49.45                80
 01/29/2021   22:17:35   (   0.03,-137.13) (   0.95,-133.05)  465.21                80