Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 4 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)
 04/24/2021   22:20:49   (   0.03,-137.20) (   0.64,-134.47)  311.10                80
 04/26/2021   10:45:15   (  -0.02,-137.20) (   0.56,-139.73)  289.18                80
 04/27/2021   10:23:51   (  -0.03,-137.19) (  -0.49,-135.21)  226.81                80
 04/28/2021   22:45:46   (   0.02,-137.18) (  -0.72,-140.50)  378.77                80
 04/29/2021   22:29:40   (   0.02,-137.17) (   0.27,-135.96)  136.79                80
 05/01/2021   10:51:28   (  -0.02,-137.15) (   0.87,-141.23)  464.93                80
 05/02/2021   10:30:02   (  -0.02,-137.14) (  -0.13,-136.70)   50.21                80
 05/04/2021   22:33:12   (   0.01,-137.09) (  -0.08,-137.45)   41.40                80
 05/05/2021   22:17:07   (   0.01,-137.08) (   0.91,-132.92)  473.72                80
 05/07/2021   10:38:54   (  -0.01,-137.06) (   0.23,-138.19)  128.54                80