Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2020 12 21.  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)
 12/21/2020   17:53:33   (   0.23,-128.24) (  -0.35,-125.53)  308.40                80
 12/23/2020   06:09:55   (  -0.21,-128.27) (  -0.63,-130.14)  213.67                80
 12/24/2020   05:51:57   (  -0.23,-128.27) (   0.50,-125.15)  356.18                80
 12/25/2020   18:08:09   (   0.20,-128.26) (   0.54,-129.71)  165.56                80
 12/26/2020   17:50:11   (   0.22,-128.26) (  -0.59,-124.72)  403.70                80
 12/28/2020   06:06:32   (  -0.19,-128.27) (  -0.45,-129.32)  119.89                80
 12/29/2020   05:48:33   (  -0.21,-128.27) (   0.67,-124.33)  449.23                80
 12/30/2020   18:04:46   (   0.19,-128.25) (   0.36,-128.89)   73.52                80
 12/31/2020   17:46:47   (   0.21,-128.24) (  -0.77,-123.90)  495.04                80
 01/02/2021   06:03:08   (  -0.19,-128.24) (  -0.27,-128.50)   30.08                80