Simultaneous Nadir Overpasses (SNOs) between GOES-17 and LANDSAT-8
TLE Epoch: 2021 12 11.  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) (   0.47,-135.00)  249.86                80
 12/12/2021   19:35:02   (  -0.03,-137.21) (   0.59,-140.17)  336.13                80
 12/14/2021   19:22:50   (  -0.03,-137.21) (  -0.01,-137.20)    1.69                80
 12/16/2021   19:07:59   (  -0.03,-137.20) (  -0.68,-134.26)  335.14                80
 12/17/2021   07:32:02   (   0.03,-137.19) (  -0.43,-139.45)  255.67                80
 12/19/2021   07:17:10   (   0.02,-137.17) (   0.18,-136.49)   78.72                80
 12/21/2021   07:04:59   (   0.02,-137.15) (   0.80,-133.52)  412.46                80
 12/21/2021   19:26:13   (  -0.02,-137.14) (   0.33,-138.67)  174.51                80
 12/23/2021   19:16:41   (  -0.01,-137.11) (  -0.29,-135.71)  158.63                80
 12/24/2021   07:38:05   (   0.01,-137.10) (  -0.81,-140.91)  432.62                80