Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 4 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/29/2021   22:29:41   (   0.03,-137.20) (   0.29,-135.97)  140.25                80
 05/01/2021   10:51:30   (  -0.02,-137.19) (   0.86,-141.25)  461.21                80
 05/02/2021   10:30:06   (  -0.02,-137.19) (  -0.11,-136.71)   54.49                80
 05/04/2021   22:33:20   (   0.02,-137.18) (  -0.08,-137.49)   35.14                80
 05/05/2021   22:17:16   (   0.02,-137.18) (   0.96,-132.96)  480.61                80
 05/07/2021   10:39:04   (  -0.01,-137.17) (   0.25,-138.23)  121.34                80
 05/08/2021   10:17:41   (  -0.01,-137.16) (  -0.78,-133.70)  394.03                80
 05/09/2021   22:39:38   (   0.01,-137.15) (  -0.43,-139.01)  211.91                80
 05/10/2021   22:23:35   (   0.01,-137.15) (   0.61,-134.48)  303.22                80
 05/12/2021   10:45:23   (  -0.01,-137.13) (   0.61,-139.75)  299.68                80
 05/13/2021   10:24:00   (  -0.01,-137.11) (  -0.43,-135.23)  214.84                80