Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 5 1.  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)
 05/03/2021   05:59:24   (  -0.04,-127.70) (  -0.05,-127.65)    5.74                80
 05/05/2021   18:00:19   (   0.04,-127.86) (  -0.13,-127.24)   71.55                80
 05/07/2021   06:19:22   (  -0.03,-127.87) (  -0.89,-131.84)  451.77                80
 05/08/2021   05:56:03   (  -0.04,-127.91) (   0.22,-126.85)  121.17                80
 05/09/2021   18:14:56   (   0.03,-128.02) (   0.82,-131.40)  386.96                80
 05/10/2021   17:56:58   (   0.04,-128.06) (  -0.35,-126.42)  186.47                80
 05/12/2021   06:16:00   (  -0.03,-128.06) (  -0.66,-131.03)  336.97                80
 05/13/2021   05:52:42   (  -0.04,-128.09) (   0.45,-126.03)  235.25                80
 05/14/2021   18:11:34   (   0.03,-128.18) (   0.59,-130.59)  274.79                80