Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/13/2019   10:25:00   (  -0.03,-137.18) (  -0.42,-135.31)  212.60                80
 09/14/2019   22:46:56   (   0.02,-137.16) (  -0.76,-140.61)  393.81                80
 09/15/2019   22:30:52   (   0.02,-137.15) (   0.26,-136.08)  121.66                80
 09/17/2019   10:52:39   (  -0.02,-137.14) (   0.94,-141.34)  479.84                80
 09/18/2019   10:31:15   (  -0.03,-137.12) (  -0.08,-136.81)   35.12                80
 09/20/2019   22:34:27   (   0.03,-137.07) (  -0.07,-137.58)   58.38                80
 09/21/2019   22:18:22   (   0.03,-137.05) (   0.96,-133.06)  455.80                80
 09/23/2019   10:40:09   (  -0.03,-137.02) (   0.25,-138.32)  147.74                80
 09/24/2019   10:18:45   (  -0.03,-136.99) (  -0.77,-133.79)  365.83                80
 09/25/2019   22:40:40   (   0.03,-136.94) (  -0.46,-139.08)  243.85                80
 09/26/2019   22:24:36   (   0.03,-136.91) (   0.57,-134.55)  269.51                80