Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 10 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/10/2019   10:21:22   (  -0.01,-137.21) (  -0.79,-133.80)  388.31                80
 10/11/2019   22:40:37   (   0.01,-137.19) (  -0.43,-139.10)  217.64                80
 10/12/2019   22:24:33   (   0.01,-137.19) (   0.61,-134.57)  298.26                80
 10/14/2019   10:43:40   (  -0.00,-137.19) (   0.59,-139.84)  302.84                80
 10/15/2019   10:27:35   (   0.00,-137.18) (  -0.39,-135.31)  212.68                80
 10/16/2019   22:46:51   (  -0.02,-137.15) (  -0.76,-140.62)  394.27                80
 10/17/2019   22:30:45   (  -0.02,-137.14) (   0.22,-136.08)  120.75                80
 10/19/2019   10:52:33   (   0.02,-137.12) (   0.98,-141.35)  482.14                80
 10/20/2019   10:31:08   (   0.02,-137.10) (  -0.06,-136.83)   32.02                80
 10/22/2019   22:36:58   (  -0.01,-137.04) (  -0.17,-137.59)   63.39                80