Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 6 22.  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)
 06/22/2021   18:05:06   (  -0.11,-128.39) (   0.01,-128.99)   67.83                80
 06/23/2021   17:47:06   (  -0.11,-128.38) (  -1.07,-123.98)  499.84                80
 06/25/2021   06:06:07   (   0.11,-128.34) (   0.06,-128.58)   27.36                80
 06/27/2021   18:04:21   (  -0.12,-128.30) (  -0.18,-128.16)   17.16                80
 06/30/2021   06:00:03   (   0.13,-128.26) (   0.27,-127.76)   57.75                80
 07/01/2021   18:18:54   (  -0.13,-128.22) (   0.81,-132.30)  466.12                80
 07/02/2021   18:00:56   (  -0.13,-128.20) (  -0.33,-127.32)  101.14                80
 07/04/2021   06:19:56   (   0.12,-128.19) (  -0.72,-131.91)  423.99                80
 07/05/2021   05:56:38   (   0.13,-128.16) (   0.43,-126.92)  142.16                80