Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 1 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  METOP-B Lat/Lon    Distance(km)  Time Diff(sec)
 01/04/2021   18:04:03   (   0.18,-128.22) (   0.13,-128.08)   16.33                80
 01/07/2021   06:02:25   (  -0.17,-128.18) (  -0.05,-127.68)   56.79                80
 01/08/2021   18:18:38   (   0.14,-128.17) (   1.06,-132.25)  464.82                80
 01/09/2021   18:00:38   (   0.16,-128.15) (  -0.02,-127.25)  102.82                80
 01/11/2021   06:17:01   (  -0.12,-128.12) (  -0.97,-131.86)  426.60                80
 01/12/2021   05:59:01   (  -0.15,-128.10) (   0.10,-126.85)  141.03                80
 01/13/2021   18:15:14   (   0.12,-128.08) (   0.85,-131.43)  381.20                80
 01/14/2021   17:57:15   (   0.14,-128.06) (  -0.23,-126.43)  186.12                80
 01/16/2021   06:13:37   (  -0.11,-128.02) (  -0.76,-131.04)  343.87                80
 01/17/2021   05:55:38   (  -0.13,-128.00) (   0.31,-126.04)  223.71                80