Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 6 13.  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)
 06/13/2021   17:53:55   (  -0.10,-128.47) (  -0.72,-125.65)  320.88                80
 06/15/2021   06:12:57   (   0.10,-128.45) (  -0.30,-130.25)  205.09                80
 06/16/2021   05:49:38   (   0.11,-128.44) (   0.84,-125.26)  362.58                80
 06/17/2021   18:08:30   (  -0.11,-128.43) (   0.18,-129.82)  158.06                80
 06/18/2021   17:50:31   (  -0.11,-128.42) (  -0.90,-124.82)  410.19                80
 06/20/2021   06:09:32   (   0.11,-128.41) (  -0.11,-129.42)  115.65                80
 06/21/2021   05:46:13   (   0.11,-128.39) (   0.97,-124.42)  451.44                80
 06/22/2021   18:05:05   (  -0.11,-128.36) (   0.05,-128.98)   71.10                80
 06/23/2021   17:47:07   (  -0.11,-128.35) (  -1.10,-123.99)  496.19                80
 06/25/2021   06:06:07   (   0.11,-128.32) (   0.03,-128.58)   30.36                80