Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 12 5.  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)
 12/06/2021   06:13:14   (   0.19,-128.04) (  -0.27,-130.22)  247.82                80
 12/07/2021   05:49:53   (   0.20,-128.01) (   0.79,-125.21)  317.96                80
 12/08/2021   18:11:24   (  -0.18,-127.99) (   0.25,-129.77)  204.14                80
 12/09/2021   17:48:05   (  -0.19,-127.96) (  -0.88,-124.78)  361.67                80
 12/11/2021   06:09:44   (   0.17,-127.89) (  -0.17,-129.37)  168.94                80
 12/12/2021   05:46:25   (   0.18,-127.86) (   0.95,-124.37)  396.76                80
 12/13/2021   18:07:56   (  -0.16,-127.83) (   0.08,-128.93)  125.40                80
 12/14/2021   17:44:37   (  -0.17,-127.80) (  -1.05,-123.94)  440.13                80
 12/16/2021   06:06:16   (   0.16,-127.73) (   0.00,-128.53)   91.10                80
 12/17/2021   05:42:56   (   0.16,-127.69) (   1.07,-123.52)  474.05                80
 12/18/2021   18:04:27   (  -0.15,-127.65) (  -0.04,-128.08)   49.18                80