Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/28/2019   10:46:24   (  -0.03,-137.20) (   0.54,-139.83)  298.81                80
 09/29/2019   10:24:59   (  -0.03,-137.21) (  -0.43,-135.29)  217.59                80
 09/30/2019   22:49:35   (   0.02,-137.20) (  -0.74,-140.60)  387.35                80
 10/01/2019   22:28:10   (   0.01,-137.20) (   0.24,-136.06)  128.94                80
 10/03/2019   10:52:38   (   0.00,-137.20) (   0.90,-141.35)  472.00                80
 10/04/2019   10:31:13   (  -0.00,-137.19) (  -0.07,-136.81)   43.64                80
 10/06/2019   22:37:03   (  -0.00,-137.17) (  -0.11,-137.58)   47.31                80
 10/07/2019   22:15:39   (   0.00,-137.16) (   0.92,-133.06)  467.93                80
 10/09/2019   10:40:06   (  -0.00,-137.15) (   0.28,-138.32)  134.23                80
 10/10/2019   10:18:42   (  -0.00,-137.14) (  -0.76,-133.80)  380.79                80