Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2020 12 25.  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)
 12/25/2020   18:08:09   (   0.20,-128.26) (   0.54,-129.71)  165.57                80
 12/26/2020   17:50:11   (   0.22,-128.26) (  -0.59,-124.72)  403.60                80
 12/28/2020   06:06:32   (  -0.19,-128.26) (  -0.45,-129.32)  120.77                80
 12/29/2020   05:48:33   (  -0.21,-128.26) (   0.68,-124.33)  448.22                80
 12/30/2020   18:04:46   (   0.19,-128.24) (   0.35,-128.89)   74.04                80
 12/31/2020   17:46:47   (   0.21,-128.24) (  -0.78,-123.90)  494.41                80
 01/02/2021   06:03:09   (  -0.19,-128.23) (  -0.26,-128.50)   31.40                80
 01/04/2021   18:04:02   (   0.18,-128.20) (   0.15,-128.07)   14.17                80
 01/07/2021   06:02:25   (  -0.17,-128.16) (  -0.06,-127.68)   55.10                80