Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 4 29.  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)
 04/30/2021   18:01:00   (   0.05,-127.66) (   0.11,-128.05)   43.98                80
 05/03/2021   05:59:24   (  -0.04,-127.70) (  -0.01,-127.66)    5.58                80
 05/05/2021   18:00:19   (   0.04,-127.86) (  -0.11,-127.23)   71.46                80
 05/07/2021   06:19:21   (  -0.03,-127.87) (  -0.91,-131.84)  451.65                80
 05/08/2021   05:56:03   (  -0.04,-127.91) (   0.21,-126.84)  121.26                80
 05/09/2021   18:14:56   (   0.03,-128.01) (   0.78,-131.41)  386.99                80
 05/10/2021   17:56:58   (   0.04,-128.06) (  -0.33,-126.42)  186.42                80
 05/12/2021   06:16:00   (  -0.03,-128.06) (  -0.68,-131.02)  336.80                80
 05/13/2021   05:52:42   (  -0.04,-128.09) (   0.44,-126.03)  235.39                80