Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 5 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/09/2021   22:42:19   (   0.02,-137.20) (  -0.42,-139.01)  207.21                80
 05/10/2021   22:20:55   (   0.02,-137.20) (   0.61,-134.49)  308.71                80
 05/12/2021   10:45:25   (  -0.01,-137.19) (   0.54,-139.76)  292.87                80
 05/13/2021   10:24:00   (  -0.02,-137.18) (  -0.44,-135.23)  222.48                80
 05/14/2021   22:48:38   (   0.01,-137.17) (  -0.72,-140.54)  383.69                80
 05/15/2021   22:29:54   (   0.01,-137.16) (   0.26,-136.01)  131.28                80
 05/17/2021   10:51:43   (  -0.01,-137.14) (   0.90,-141.28)  471.71                80
 05/18/2021   10:30:19   (  -0.01,-137.13) (  -0.08,-136.75)   42.81                80
 05/20/2021   22:33:33   (   0.01,-137.09) (  -0.09,-137.53)   50.40                80
 05/21/2021   22:17:29   (   0.01,-137.07) (   0.95,-133.00)  463.75                80