Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 5 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/04/2021   22:36:00   (   0.02,-137.20) (  -0.05,-137.49)   33.26                80
 05/05/2021   22:14:37   (   0.02,-137.20) (   0.98,-132.97)  482.99                80
 05/07/2021   10:39:05   (  -0.01,-137.20) (   0.23,-138.23)  118.13                80
 05/08/2021   10:17:41   (  -0.02,-137.20) (  -0.80,-133.71)  397.82                80
 05/09/2021   22:39:39   (   0.01,-137.20) (  -0.41,-139.01)  206.98                80
 05/10/2021   22:23:35   (   0.01,-137.20) (   0.62,-134.49)  308.73                80
 05/12/2021   10:45:24   (  -0.01,-137.19) (   0.59,-139.75)  293.40                80
 05/13/2021   10:24:00   (  -0.01,-137.18) (  -0.44,-135.23)  221.72                80
 05/14/2021   22:45:57   (   0.01,-137.16) (  -0.76,-140.53)  384.70                80
 05/15/2021   22:29:54   (   0.01,-137.15) (   0.27,-136.01)  130.07                80