Simultaneous Nadir Overpasses (SNOs) between GOES-17 and LANDSAT-8
TLE Epoch: 2021 12 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 12/12/2021   07:11:06   (   0.03,-137.21) (   0.48,-135.00)  250.30                80
 12/12/2021   19:35:02   (  -0.03,-137.21) (   0.59,-140.17)  335.50                80
 12/14/2021   19:22:50   (  -0.03,-137.22) (  -0.01,-137.21)    1.83                80
 12/16/2021   19:07:59   (  -0.03,-137.21) (  -0.68,-134.26)  336.63                80
 12/17/2021   07:32:02   (   0.03,-137.21) (  -0.43,-139.45)  254.13                80
 12/19/2021   07:17:11   (   0.02,-137.19) (   0.18,-136.49)   80.66                80
 12/21/2021   07:04:59   (   0.02,-137.17) (   0.80,-133.52)  414.81                80
 12/21/2021   19:26:13   (  -0.02,-137.17) (   0.33,-138.67)  172.02                80
 12/23/2021   19:16:42   (  -0.01,-137.14) (  -0.35,-135.73)  161.56                80
 12/24/2021   07:38:05   (   0.01,-137.13) (  -0.82,-140.91)  429.60                80
 12/25/2021   19:04:30   (  -0.01,-137.11) (  -0.96,-132.77)  494.58                80