Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/12/2019   10:46:25   (  -0.03,-137.19) (   0.59,-139.84)  303.12                80
 09/13/2019   10:25:00   (  -0.02,-137.18) (  -0.43,-135.31)  212.60                80
 09/14/2019   22:46:57   (   0.02,-137.16) (  -0.75,-140.61)  393.85                80
 09/15/2019   22:30:52   (   0.02,-137.15) (   0.27,-136.08)  121.63                80
 09/17/2019   10:52:39   (  -0.02,-137.14) (   0.93,-141.34)  479.78                80
 09/18/2019   10:31:15   (  -0.03,-137.12) (  -0.09,-136.81)   35.17                80
 09/20/2019   22:34:27   (   0.03,-137.07) (  -0.06,-137.59)   58.39                80
 09/21/2019   22:18:21   (   0.03,-137.05) (   0.91,-133.04)  455.86                80
 09/23/2019   10:40:10   (  -0.03,-137.02) (   0.24,-138.32)  147.60                80
 09/24/2019   10:18:44   (  -0.03,-136.99) (  -0.73,-133.78)  366.02                80