Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/28/2020   22:17:33   (   0.01,-137.23) (   0.95,-133.02)  479.54                80
 12/30/2020   10:36:40   (  -0.00,-137.22) (   0.26,-138.28)  121.18                80
 12/31/2020   10:20:35   (   0.00,-137.22) (  -0.75,-133.75)  394.59                80
 01/01/2021   22:39:53   (  -0.01,-137.20) (  -0.40,-139.07)  212.02                80
 01/02/2021   22:23:48   (  -0.01,-137.19) (   0.61,-134.54)  303.31                80
 01/04/2021   10:42:56   (  -0.01,-137.18) (   0.60,-139.80)  298.82                80
 01/05/2021   10:26:51   (  -0.01,-137.17) (  -0.41,-135.27)  216.10                80
 01/06/2021   22:46:08   (   0.01,-137.14) (  -0.74,-140.58)  391.59                80
 01/07/2021   22:30:03   (   0.00,-137.13) (   0.21,-136.04)  123.25                80
 01/09/2021   10:49:11   (   0.01,-137.11) (   0.94,-141.32)  479.64                80
 01/10/2021   10:33:07   (   0.01,-137.09) (  -0.07,-136.79)   34.43                80