Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/23/2019   10:30:36   (   0.02,-137.20) (  -0.09,-136.79)   47.92                80
 12/25/2019   22:36:26   (  -0.03,-137.19) (  -0.10,-137.55)   41.60                80
 12/26/2019   22:15:00   (  -0.02,-137.18) (   0.90,-133.02)  473.82                80
 12/28/2019   10:39:26   (   0.03,-137.16) (   0.29,-138.28)  128.37                80
 12/29/2019   10:18:01   (   0.02,-137.14) (  -0.71,-133.74)  386.79                80
 12/30/2019   22:42:36   (  -0.03,-137.12) (  -0.47,-139.04)  219.22                80
 12/31/2019   22:21:11   (  -0.02,-137.11) (   0.53,-134.51)  295.80                80
 01/02/2020   10:45:38   (   0.03,-137.09) (   0.61,-139.79)  306.95                80
 01/03/2020   10:24:13   (   0.02,-137.07) (  -0.40,-135.25)  207.76                80
 01/04/2020   22:48:47   (  -0.04,-137.04) (  -0.84,-140.54)  399.03                80