Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 6 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/18/2021   10:52:06   (   0.02,-137.20) (   0.96,-141.34)  471.76                80
 06/19/2021   10:30:42   (   0.02,-137.20) (  -0.07,-136.81)   43.95                80
 06/21/2021   22:36:36   (  -0.01,-137.18) (  -0.10,-137.59)   46.92                80
 06/22/2021   22:15:13   (  -0.00,-137.17) (   0.93,-133.07)  467.97                80
 06/24/2021   10:39:42   (  -0.00,-137.16) (   0.23,-138.34)  134.72                80
 06/25/2021   10:18:17   (  -0.01,-137.14) (  -0.74,-133.81)  379.78                80
 06/26/2021   22:42:55   (   0.01,-137.12) (  -0.45,-139.11)  227.95                80
 06/27/2021   22:24:11   (   0.01,-137.10) (   0.58,-134.59)  286.49                80
 06/29/2021   10:46:01   (  -0.01,-137.08) (   0.59,-139.86)  316.58                80
 06/30/2021   10:24:36   (  -0.01,-137.06) (  -0.39,-135.33)  197.84                80