Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 6 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)
 06/09/2021   10:18:05   (   0.00,-137.20) (  -0.78,-133.78)  390.52                80
 06/10/2021   22:42:42   (  -0.00,-137.20) (  -0.40,-139.08)  214.15                80
 06/11/2021   22:21:18   (   0.00,-137.20) (   0.58,-134.55)  301.97                80
 06/13/2021   10:45:47   (  -0.00,-137.20) (   0.57,-139.83)  298.77                80
 06/14/2021   10:24:23   (  -0.01,-137.20) (  -0.42,-135.29)  216.99                80
 06/15/2021   22:49:00   (   0.00,-137.19) (  -0.76,-140.60)  388.86                80
 06/16/2021   22:27:36   (   0.00,-137.18) (   0.28,-136.07)  126.71                80
 06/18/2021   10:52:05   (  -0.00,-137.17) (   0.93,-141.34)  474.98                80
 06/19/2021   10:30:40   (  -0.00,-137.16) (  -0.06,-136.80)   40.24                80
 06/21/2021   22:33:54   (   0.01,-137.13) (  -0.07,-137.59)   52.37                80
 06/22/2021   22:17:50   (   0.01,-137.11) (   0.92,-133.06)  462.12                80