Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 6 17.  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)
 06/17/2021   18:08:30   (  -0.11,-128.43) (   0.20,-129.82)  158.15                80
 06/18/2021   17:50:32   (  -0.11,-128.42) (  -0.94,-124.83)  410.04                80
 06/20/2021   06:09:32   (   0.11,-128.40) (  -0.13,-129.42)  115.94                80
 06/21/2021   05:46:13   (   0.11,-128.38) (   1.01,-124.43)  451.11                80
 06/22/2021   18:05:06   (  -0.11,-128.36) (   0.01,-128.99)   71.53                80
 06/23/2021   17:47:06   (  -0.11,-128.34) (  -1.08,-123.99)  495.74                80
 06/25/2021   06:06:08   (   0.11,-128.31) (   0.07,-128.59)   30.93                80
 06/27/2021   18:04:20   (  -0.12,-128.25) (  -0.13,-128.15)   11.01                80
 06/30/2021   06:00:02   (   0.13,-128.21) (   0.22,-127.75)   51.88                80