Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 6 26.  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) (  -0.15,-128.15)   16.86                80
 06/30/2021   06:00:02   (   0.13,-128.25) (   0.24,-127.75)   56.75                80
 07/01/2021   18:18:55   (  -0.12,-128.22) (   0.79,-132.31)  466.47                80
 07/02/2021   18:00:56   (  -0.13,-128.20) (  -0.36,-127.32)  100.73                80
 07/04/2021   06:19:56   (   0.12,-128.18) (  -0.69,-131.91)  425.27                80
 07/05/2021   05:56:37   (   0.13,-128.15) (   0.40,-126.91)  140.76                80
 07/06/2021   18:15:29   (  -0.12,-128.10) (   0.63,-131.47)  384.15                80
 07/07/2021   17:57:31   (  -0.13,-128.08) (  -0.51,-126.48)  182.25                80
 07/09/2021   06:16:31   (   0.12,-128.05) (  -0.52,-131.07)  344.16                80