Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 10 18.  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)
 10/19/2021   06:03:45   (   0.34,-128.24) (   0.28,-128.58)   38.52                80
 10/21/2021   18:04:38   (  -0.34,-128.29) (  -0.38,-128.15)   16.64                80
 10/24/2021   06:03:00   (   0.34,-128.34) (   0.49,-127.75)   66.96                80
 10/25/2021   18:19:11   (  -0.34,-128.36) (   0.57,-132.31)  450.63                80
 10/26/2021   18:01:13   (  -0.33,-128.37) (  -0.59,-127.32)  120.07                80
 10/28/2021   06:20:13   (   0.33,-128.39) (  -0.45,-131.92)  401.47                80
 10/29/2021   05:56:53   (   0.33,-128.40) (   0.65,-126.92)  168.76                80
 10/30/2021   18:15:46   (  -0.32,-128.41) (   0.35,-131.48)  349.86                80
 10/31/2021   17:57:46   (  -0.32,-128.42) (  -0.75,-126.49)  220.24                80