Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 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)
 01/28/2021   22:33:40   (   0.01,-137.24) (  -0.08,-137.58)   39.29                80
 01/29/2021   22:17:35   (   0.01,-137.24) (   0.94,-133.05)  477.91                80
 01/31/2021   10:39:24   (  -0.01,-137.26) (   0.21,-138.33)  121.16                80
 02/01/2021   10:17:59   (  -0.01,-137.26) (  -0.81,-133.80)  395.71                80
 02/02/2021   22:39:56   (   0.01,-137.26) (  -0.37,-139.10)  208.98                80
 02/03/2021   22:23:50   (   0.01,-137.26) (   0.59,-134.56)  307.58                80
 02/05/2021   10:45:38   (  -0.01,-137.27) (   0.56,-139.84)  292.65                80
 02/06/2021   10:24:14   (  -0.02,-137.26) (  -0.46,-135.31)  223.17                80
 02/07/2021   22:46:10   (   0.02,-137.25) (  -0.72,-140.61)  383.28                80
 02/08/2021   22:30:06   (   0.03,-137.24) (   0.30,-136.08)  132.27                80