Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 2 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/08/2021   22:30:05   (   0.03,-137.22) (   0.27,-136.07)  130.38                80
 02/10/2021   10:51:53   (  -0.02,-137.22) (   0.88,-141.35)  470.27                80
 02/11/2021   10:30:28   (  -0.02,-137.22) (  -0.09,-136.81)   46.63                80
 02/13/2021   22:36:20   (   0.01,-137.23) (  -0.06,-137.59)   39.96                80
 02/14/2021   22:14:55   (   0.01,-137.23) (   0.97,-133.06)  476.55                80
 02/16/2021   10:39:22   (  -0.01,-137.23) (   0.24,-138.32)  124.81                80
 02/17/2021   10:17:58   (  -0.01,-137.23) (  -0.79,-133.79)  391.34                80
 02/18/2021   22:39:54   (   0.01,-137.23) (  -0.38,-139.10)  212.90                80
 02/19/2021   22:23:49   (   0.01,-137.22) (   0.59,-134.56)  302.97                80
 02/21/2021   10:45:37   (   0.00,-137.20) (   0.56,-139.83)  299.56                80
 02/22/2021   10:24:12   (   0.00,-137.19) (  -0.41,-135.29)  215.69                80