Simultaneous Nadir Overpasses (SNOs) between GOES-17 and METOP-B
TLE Epoch: 2021 12 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  METOP-B Lat/Lon    Distance(km)  Time Diff(sec)
 12/10/2021   06:28:15   (   0.04,-137.21) (   0.57,-134.77)  276.87                80
 12/11/2021   18:49:47   (  -0.03,-137.21) (   0.47,-139.33)  242.35                80
 12/12/2021   18:26:27   (  -0.03,-137.21) (  -0.65,-134.34)  326.97                80
 12/14/2021   06:48:07   (   0.03,-137.21) (  -0.33,-138.94)  196.72                80
 12/15/2021   06:24:47   (   0.03,-137.21) (   0.73,-133.94)  372.18                80
 12/16/2021   18:43:39   (  -0.03,-137.20) (   0.24,-138.51)  148.11                80
 12/17/2021   18:25:39   (  -0.03,-137.20) (  -0.83,-133.50)  420.45                80
 12/19/2021   06:44:39   (   0.02,-137.18) (  -0.17,-138.10)  104.58                80
 12/20/2021   06:21:19   (   0.02,-137.17) (   0.90,-133.10)  463.50                80
 12/21/2021   18:40:10   (  -0.01,-137.15) (   0.12,-137.66)   58.16                80