Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 8 19.  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)
 08/19/2021   18:07:57   (  -0.00,-128.19) (   0.19,-128.92)   83.51                80
 08/20/2021   17:44:38   (  -0.03,-128.21) (  -0.97,-123.94)  486.28                80
 08/22/2021   06:06:18   (  -0.00,-128.29) (  -0.06,-128.53)   27.46                80
 08/24/2021   18:01:51   (   0.01,-128.24) (  -0.05,-128.10)   16.57                80
 08/26/2021   06:23:31   (  -0.04,-128.33) (  -0.99,-132.69)  496.44                80
 08/27/2021   06:00:12   (  -0.01,-128.33) (   0.11,-127.69)   72.62                80
 08/28/2021   18:21:43   (   0.05,-128.26) (   0.94,-132.24)  454.02                80
 08/29/2021   17:58:25   (   0.03,-128.26) (  -0.23,-127.26)  115.20                80
 08/31/2021   06:20:05   (  -0.07,-128.35) (  -0.82,-131.85)  398.32                80
 09/01/2021   05:56:46   (  -0.04,-128.35) (   0.28,-126.85)  169.99                80