Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 6 12.  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)
 06/12/2021   18:11:55   (  -0.09,-128.47) (   0.38,-130.65)  247.84                80
 06/13/2021   17:53:55   (  -0.10,-128.47) (  -0.70,-125.65)  320.79                80
 06/15/2021   06:12:56   (   0.10,-128.45) (  -0.32,-130.25)  205.21                80
 06/16/2021   05:49:38   (   0.11,-128.44) (   0.82,-125.26)  362.45                80
 06/17/2021   18:08:30   (  -0.11,-128.43) (   0.19,-129.82)  158.27                80
 06/18/2021   17:50:31   (  -0.11,-128.42) (  -0.89,-124.82)  409.94                80
 06/20/2021   06:09:32   (   0.11,-128.40) (  -0.13,-129.42)  115.92                80
 06/21/2021   05:46:14   (   0.11,-128.39) (   1.02,-124.43)  451.14                80
 06/22/2021   18:05:06   (  -0.11,-128.36) (   0.00,-128.99)   71.53                80
 06/23/2021   17:47:06   (  -0.11,-128.34) (  -1.08,-123.99)  495.77                80
 06/25/2021   06:06:08   (   0.11,-128.32) (   0.07,-128.59)   30.79                80