Simultaneous Nadir Overpasses (SNOs) between GOES-17 and METOP-B
TLE Epoch: 2021 1 20.  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)
 01/21/2021   18:52:58   (   0.01,-137.23) (   0.70,-140.22)  341.24                80
 01/22/2021   18:29:40   (   0.00,-137.23) (  -0.43,-135.23)  227.19                80
 01/24/2021   06:51:22   (   0.02,-137.21) (  -0.56,-139.84)  299.91                80
 01/25/2021   06:30:42   (   0.01,-137.20) (   0.52,-134.84)  268.26                80
 01/26/2021   18:46:55   (  -0.01,-137.19) (   0.48,-139.41)  251.84                80
 01/27/2021   18:28:55   (  -0.00,-137.18) (  -0.60,-134.41)  315.82                80
 01/29/2021   06:45:18   (   0.00,-137.15) (  -0.39,-139.01)  212.12                80
 01/30/2021   06:27:18   (   0.00,-137.13) (   0.69,-134.01)  355.13                80
 01/31/2021   18:43:30   (   0.00,-137.12) (   0.31,-138.58)  166.26                80
 02/01/2021   18:25:31   (   0.00,-137.10) (  -0.77,-133.58)  400.72                80
 02/03/2021   06:41:52   (  -0.00,-137.06) (  -0.26,-138.18)  128.09                80