Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 5 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)
 05/05/2021   18:00:19   (   0.03,-127.86) (  -0.13,-127.24)   70.81                80
 05/07/2021   06:19:22   (  -0.02,-127.86) (  -0.88,-131.84)  452.95                80
 05/08/2021   05:56:03   (  -0.03,-127.89) (   0.23,-126.85)  119.82                80
 05/09/2021   18:14:57   (   0.02,-128.00) (   0.76,-131.42)  388.44                80
 05/10/2021   17:56:58   (   0.03,-128.04) (  -0.36,-126.43)  184.80                80
 05/12/2021   06:16:00   (  -0.02,-128.05) (  -0.66,-131.03)  339.11                80
 05/13/2021   05:52:42   (  -0.03,-128.07) (   0.45,-126.03)  232.93                80
 05/14/2021   18:11:34   (   0.02,-128.16) (   0.59,-130.59)  277.22                80
 05/15/2021   17:53:36   (   0.03,-128.19) (  -0.53,-125.60)  295.12                80
 05/17/2021   06:12:38   (  -0.02,-128.19) (  -0.49,-130.20)  229.39                80