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   22:20:48   (   0.03,-137.20) (   0.62,-134.47)  311.12                80
 04/26/2021   10:45:16   (  -0.02,-137.20) (   0.52,-139.74)  289.17                80
 04/27/2021   10:23:50   (  -0.03,-137.19) (  -0.47,-135.20)  226.82                80
 04/28/2021   22:45:45   (   0.02,-137.18) (  -0.74,-140.50)  378.75                80
 04/29/2021   22:29:41   (   0.02,-137.17) (   0.31,-135.97)  136.83                80
 05/01/2021   10:51:27   (  -0.02,-137.15) (   0.89,-141.23)  464.88                80
 05/02/2021   10:30:02   (  -0.02,-137.14) (  -0.11,-136.69)   50.25                80
 05/04/2021   22:33:12   (   0.01,-137.09) (  -0.10,-137.45)   41.42                80
 05/05/2021   22:17:07   (   0.01,-137.08) (   0.96,-132.93)  473.78                80
 05/07/2021   10:38:54   (  -0.01,-137.06) (   0.24,-138.19)  128.44                80
 05/08/2021   10:17:28   (  -0.01,-137.04) (  -0.76,-133.65)  386.38                80