Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 8 20.  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)
 08/20/2021   17:44:38   (  -0.03,-128.20) (  -0.99,-123.94)  486.29                80
 08/22/2021   06:06:19   (  -0.00,-128.29) (  -0.05,-128.53)   27.60                80
 08/24/2021   18:04:30   (   0.01,-128.23) (  -0.00,-128.09)   16.52                80
 08/26/2021   06:23:31   (  -0.04,-128.32) (  -1.04,-132.68)  496.69                80
 08/27/2021   06:00:12   (  -0.02,-128.33) (   0.12,-127.69)   72.32                80
 08/28/2021   18:21:43   (   0.05,-128.26) (   0.92,-132.25)  454.21                80
 08/29/2021   17:58:24   (   0.03,-128.26) (  -0.18,-127.25)  114.96                80
 08/31/2021   06:20:04   (  -0.07,-128.34) (  -0.86,-131.84)  398.68                80
 09/01/2021   05:56:46   (  -0.04,-128.34) (   0.30,-126.86)  169.60                80
 09/02/2021   18:18:16   (   0.08,-128.25) (   0.79,-131.40)  358.48                80