Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 6 27.  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)
 06/27/2021   18:04:21   (  -0.12,-128.30) (  -0.17,-128.15)   16.93                80
 06/30/2021   06:00:03   (   0.13,-128.25) (   0.26,-127.75)   56.56                80
 07/01/2021   18:18:55   (  -0.12,-128.21) (   0.76,-132.31)  466.68                80
 07/02/2021   18:00:56   (  -0.13,-128.20) (  -0.32,-127.31)  100.41                80
 07/04/2021   06:19:56   (   0.12,-128.17) (  -0.73,-131.90)  425.71                80
 07/05/2021   05:56:37   (   0.13,-128.14) (   0.42,-126.92)  140.26                80
 07/06/2021   18:15:30   (  -0.12,-128.09) (   0.61,-131.48)  384.62                80
 07/07/2021   17:57:30   (  -0.13,-128.07) (  -0.48,-126.48)  181.70                80
 07/09/2021   06:16:31   (   0.12,-128.04) (  -0.56,-131.07)  344.86                80
 07/10/2021   05:53:12   (   0.13,-128.01) (   0.59,-126.08)  220.22                80