Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/29/2021   22:17:36   (  -0.00,-137.23) (   0.96,-133.05)  476.64                80
 01/31/2021   10:39:23   (  -0.00,-137.24) (   0.25,-138.32)  122.46                80
 02/01/2021   10:17:59   (  -0.00,-137.25) (  -0.77,-133.79)  394.35                80
 02/02/2021   22:39:55   (   0.00,-137.25) (  -0.41,-139.09)  210.30                80
 02/03/2021   22:23:50   (   0.00,-137.25) (   0.61,-134.56)  306.23                80
 02/05/2021   10:45:38   (  -0.01,-137.25) (   0.60,-139.83)  294.01                80
 02/06/2021   10:24:13   (  -0.01,-137.25) (  -0.43,-135.30)  221.83                80
 02/07/2021   22:46:09   (   0.02,-137.23) (  -0.75,-140.60)  384.63                80
 02/08/2021   22:30:05   (   0.02,-137.22) (   0.28,-136.08)  130.90                80
 02/10/2021   10:51:53   (  -0.02,-137.22) (   0.87,-141.35)  470.34                80
 02/11/2021   10:30:28   (  -0.02,-137.21) (  -0.09,-136.81)   45.05                80