Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 3 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/19/2020   22:39:58   (  -0.00,-137.20) (  -0.42,-139.09)  215.73                80
 03/20/2020   22:23:53   (  -0.00,-137.20) (   0.59,-134.56)  301.14                80
 03/22/2020   10:45:42   (  -0.00,-137.21) (   0.56,-139.84)  298.92                80
 03/23/2020   10:24:17   (  -0.00,-137.21) (  -0.45,-135.31)  217.65                80
 03/24/2020   22:46:14   (   0.00,-137.21) (  -0.76,-140.61)  386.78                80
 03/25/2020   22:30:09   (   0.00,-137.21) (   0.25,-136.08)  129.65                80
 03/27/2020   10:51:57   (  -0.00,-137.21) (   0.90,-141.35)  471.03                80
 03/28/2020   10:30:33   (  -0.00,-137.21) (  -0.11,-136.82)   44.84                80
 03/30/2020   22:33:45   (   0.00,-137.19) (  -0.08,-137.59)   45.97                80
 03/31/2020   22:17:40   (   0.00,-137.17) (   0.94,-133.06)  469.18                80
 04/02/2020   10:39:28   (  -0.00,-137.16) (   0.28,-138.32)  133.45                80