Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 4 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/06/2021   10:17:46   (  -0.04,-137.21) (  -0.84,-133.75)  394.74                80
 04/07/2021   22:39:41   (   0.03,-137.22) (  -0.38,-139.04)  208.58                80
 04/08/2021   22:23:37   (   0.03,-137.21) (   0.66,-134.52)  307.92                80
 04/10/2021   10:45:23   (  -0.03,-137.20) (   0.55,-139.77)  293.38                80
 04/11/2021   10:23:59   (  -0.03,-137.20) (  -0.49,-135.25)  222.76                80
 04/12/2021   22:45:54   (   0.03,-137.20) (  -0.73,-140.54)  381.49                80
 04/13/2021   22:29:50   (   0.03,-137.19) (   0.32,-136.02)  134.38                80
 04/15/2021   10:51:36   (  -0.03,-137.17) (   0.89,-141.27)  467.98                80
 04/16/2021   10:30:10   (  -0.03,-137.16) (  -0.10,-136.74)   47.33                80
 04/18/2021   22:33:21   (   0.02,-137.12) (  -0.07,-137.51)   43.67                80
 04/19/2021   22:17:16   (   0.02,-137.11) (   0.92,-132.97)  471.07                80