Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 10 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)
 10/14/2021   10:37:59   (   0.03,-137.21) (   0.32,-138.42)  138.75                80
 10/15/2021   10:21:54   (   0.03,-137.20) (  -0.69,-133.89)  377.53                80
 10/16/2021   22:41:11   (  -0.03,-137.19) (  -0.50,-139.19)  228.30                80
 10/17/2021   22:25:06   (  -0.03,-137.19) (   0.51,-134.66)  288.05                80
 10/19/2021   10:44:15   (   0.02,-137.19) (   0.65,-139.93)  311.71                80
 10/20/2021   10:28:10   (   0.03,-137.19) (  -0.37,-135.40)  204.40                80
 10/21/2021   22:47:26   (  -0.02,-137.17) (  -0.82,-140.70)  401.98                80
 10/22/2021   22:31:22   (  -0.03,-137.16) (   0.20,-136.16)  113.69                80
 10/24/2021   10:50:30   (   0.02,-137.16) (   0.96,-141.44)  487.34                80
 10/25/2021   10:34:26   (   0.02,-137.14) (  -0.06,-136.90)   27.91                80