Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 4 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/15/2020   22:33:46   (   0.02,-137.18) (  -0.04,-137.60)   47.33                80
 04/16/2020   22:17:41   (   0.02,-137.17) (   0.92,-133.06)  468.53                80
 04/18/2020   10:39:29   (  -0.02,-137.15) (   0.22,-138.33)  133.62                80
 04/19/2020   10:18:04   (  -0.02,-137.14) (  -0.75,-133.79)  381.81                80
 04/20/2020   22:40:00   (   0.01,-137.13) (  -0.45,-139.09)  223.80                80
 04/21/2020   22:23:56   (   0.01,-137.12) (   0.57,-134.56)  291.47                80
 04/23/2020   10:45:43   (  -0.01,-137.10) (   0.62,-139.83)  311.40                80
 04/24/2020   10:24:18   (  -0.02,-137.08) (  -0.40,-135.30)  203.25                80
 04/25/2020   22:46:15   (   0.01,-137.06) (  -0.79,-140.60)  403.96                80
 04/26/2020   22:30:10   (   0.01,-137.04) (   0.24,-136.07)  110.32                80
 04/28/2020   10:51:58   (  -0.01,-137.00) (   0.96,-141.34)  493.91                80
 04/29/2020   10:30:33   (  -0.01,-136.97) (  -0.07,-136.81)   19.82                80