Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 8 11.  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)
 08/12/2021   06:13:10   (   0.04,-128.17) (  -0.43,-130.20)  232.25                80
 08/13/2021   05:49:52   (   0.06,-128.18) (   0.73,-125.22)  337.90                80
 08/14/2021   18:11:23   (  -0.03,-128.13) (   0.34,-129.77)  186.13                80
 08/15/2021   17:48:05   (  -0.05,-128.15) (  -0.82,-124.78)  384.20                80
 08/17/2021   06:09:45   (   0.02,-128.24) (  -0.21,-129.37)  128.91                80
 08/18/2021   05:46:26   (   0.04,-128.24) (   0.89,-124.38)  440.32                80
 08/19/2021   18:07:57   (  -0.01,-128.18) (   0.17,-128.93)   85.44                80
 08/20/2021   17:44:38   (  -0.03,-128.19) (  -0.99,-123.94)  484.13                80
 08/22/2021   06:06:19   (   0.00,-128.28) (  -0.04,-128.53)   29.16                80
 08/24/2021   18:01:50   (  -0.00,-128.21) (  -0.01,-128.09)   13.79                80