Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 12 6.  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   06:13:13   (   0.19,-128.04) (  -0.28,-130.22)  247.84                80
 12/07/2021   05:49:54   (   0.20,-128.01) (   0.84,-125.22)  317.92                80
 12/08/2021   18:11:25   (  -0.18,-127.98) (   0.20,-129.78)  204.20                80
 12/09/2021   17:48:05   (  -0.19,-127.95) (  -0.87,-124.78)  361.59                80
 12/11/2021   06:09:44   (   0.17,-127.89) (  -0.18,-129.37)  169.04                80
 12/12/2021   05:46:25   (   0.18,-127.86) (   0.95,-124.37)  396.65                80
 12/13/2021   18:07:56   (  -0.16,-127.83) (   0.09,-128.93)  125.54                80
 12/14/2021   17:44:37   (  -0.17,-127.80) (  -1.04,-123.94)  439.98                80
 12/16/2021   06:06:16   (   0.16,-127.72) (  -0.00,-128.53)   91.25                80
 12/17/2021   05:42:55   (   0.16,-127.69) (   1.06,-123.52)  473.88                80
 12/18/2021   18:04:27   (  -0.15,-127.65) (  -0.04,-128.08)   49.38                80