Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 5 24.  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)
 05/27/2021   06:05:54   (   0.04,-128.37) (   0.02,-128.57)   22.51                80
 05/29/2021   18:04:06   (  -0.05,-128.43) (  -0.09,-128.13)   33.74                80
 05/31/2021   06:23:09   (   0.06,-128.43) (  -0.89,-132.74)  491.26                80
 06/01/2021   05:59:50   (   0.06,-128.43) (   0.24,-127.75)   78.65                80
 06/02/2021   18:18:43   (  -0.07,-128.47) (   0.76,-132.31)  436.92                80
 06/03/2021   18:00:43   (  -0.07,-128.49) (  -0.32,-127.31)  133.79                80
 06/05/2021   06:19:44   (   0.07,-128.49) (  -0.72,-131.91)  390.26                80
 06/06/2021   05:56:26   (   0.07,-128.49) (   0.42,-126.92)  179.45                80