Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 2 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/21/2020   22:46:06   (  -0.03,-137.22) (  -0.78,-140.57)  381.67                80
 02/22/2020   22:30:01   (  -0.03,-137.21) (   0.22,-136.03)  134.25                80
 02/24/2020   10:51:49   (   0.03,-137.20) (   0.96,-141.31)  468.02                80
 02/25/2020   10:30:25   (   0.03,-137.20) (  -0.04,-136.77)   47.65                80
 02/27/2020   22:33:38   (  -0.03,-137.18) (  -0.10,-137.56)   42.05                80
 02/28/2020   22:17:33   (  -0.03,-137.18) (   0.90,-133.02)  473.19                80
 03/01/2020   10:39:22   (   0.04,-137.15) (   0.28,-138.30)  130.29                80
 03/02/2020   10:17:57   (   0.04,-137.13) (  -0.73,-133.76)  384.40                80
 03/03/2020   22:39:53   (  -0.04,-137.11) (  -0.48,-139.07)  222.43                80
 03/04/2020   22:23:49   (  -0.04,-137.09) (   0.52,-134.53)  291.75                80