Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 5 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/14/2021   22:48:38   (   0.01,-137.20) (  -0.71,-140.54)  381.03                80
 05/15/2021   22:27:14   (   0.02,-137.20) (   0.27,-136.01)  135.13                80
 05/17/2021   10:51:43   (  -0.01,-137.20) (   0.88,-141.29)  465.47                80
 05/18/2021   10:30:19   (  -0.01,-137.19) (  -0.09,-136.75)   50.30                80
 05/20/2021   22:36:13   (   0.01,-137.18) (  -0.08,-137.53)   40.23                80
 05/21/2021   22:14:49   (   0.01,-137.17) (   0.96,-133.01)  475.13                80
 05/23/2021   10:39:17   (  -0.01,-137.16) (   0.26,-138.27)  126.78                80
 05/24/2021   10:17:54   (  -0.01,-137.15) (  -0.78,-133.75)  388.08                80
 05/25/2021   22:39:51   (   0.01,-137.12) (  -0.42,-139.05)  219.49                80
 05/26/2021   22:23:47   (   0.01,-137.11) (   0.56,-134.52)  294.87                80