Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 2 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/16/2020   22:39:49   (  -0.03,-137.22) (  -0.42,-139.05)  208.55                80
 02/17/2020   22:23:45   (  -0.03,-137.21) (   0.58,-134.52)  307.31                80
 02/19/2020   10:45:33   (   0.04,-137.20) (   0.60,-139.79)  295.21                80
 02/20/2020   10:24:09   (   0.04,-137.19) (  -0.40,-135.26)  220.26                80
 02/21/2020   22:46:05   (  -0.04,-137.18) (  -0.81,-140.56)  385.02                80
 02/22/2020   22:30:01   (  -0.04,-137.18) (   0.19,-136.03)  130.35                80
 02/24/2020   10:51:49   (   0.04,-137.16) (   0.99,-141.30)  472.69                80
 02/25/2020   10:30:24   (   0.04,-137.15) (  -0.02,-136.77)   42.45                80
 02/27/2020   22:33:37   (  -0.04,-137.12) (  -0.13,-137.55)   48.93                80
 02/28/2020   22:17:33   (  -0.04,-137.11) (   0.88,-133.02)  465.75                80