Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 3 18.  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)
 03/18/2021   17:53:33   (   0.15,-128.46) (  -0.51,-125.58)  328.54                80
 03/20/2021   06:12:32   (  -0.15,-128.37) (  -0.56,-130.16)  204.45                80
 03/21/2021   05:49:12   (  -0.14,-128.36) (   0.58,-125.17)  364.21                80
 03/22/2021   18:08:04   (   0.14,-128.44) (   0.45,-129.73)  147.23                80
 03/23/2021   17:50:04   (   0.14,-128.44) (  -0.69,-124.74)  421.32                80
 03/25/2021   06:09:02   (  -0.14,-128.34) (  -0.38,-129.32)  112.56                80
 03/26/2021   05:45:43   (  -0.14,-128.33) (   0.76,-124.33)  455.56                80
 03/27/2021   18:04:34   (   0.14,-128.40) (   0.27,-128.89)   56.85                80
 03/30/2021   06:05:33   (  -0.14,-128.28) (  -0.20,-128.48)   23.03                80