Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 5 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/31/2021   22:27:26   (   0.00,-137.18) (   0.25,-136.04)  130.39                80
 06/02/2021   10:51:54   (   0.00,-137.18) (   0.95,-141.31)  471.16                80
 06/03/2021   10:30:30   (   0.00,-137.17) (  -0.09,-136.78)   44.29                80
 06/05/2021   22:36:23   (  -0.00,-137.15) (  -0.12,-137.55)   46.29                80
 06/06/2021   22:17:40   (   0.00,-137.14) (   0.93,-133.03)  468.92                80
 06/08/2021   10:39:28   (  -0.00,-137.13) (   0.28,-138.30)  133.82                80
 06/09/2021   10:18:05   (  -0.01,-137.11) (  -0.76,-133.77)  380.73                80
 06/10/2021   22:40:02   (   0.01,-137.09) (  -0.42,-139.08)  226.81                80
 06/11/2021   22:23:57   (   0.01,-137.07) (   0.57,-134.55)  287.43                80
 06/13/2021   10:45:46   (  -0.00,-137.04) (   0.64,-139.81)  316.58                80