Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 12 27.  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)
 12/27/2021   18:18:10   (  -0.09,-128.06) (   0.67,-131.42)  383.14                80
 12/28/2021   17:54:50   (  -0.10,-128.08) (  -0.46,-126.42)  188.78                80
 12/30/2021   06:16:31   (   0.09,-128.11) (  -0.53,-131.03)  331.47                80
 12/31/2021   05:53:10   (   0.10,-128.13) (   0.55,-126.02)  239.82                80
 01/01/2022   18:14:42   (  -0.09,-128.17) (   0.45,-130.59)  275.43                80
 01/02/2022   17:51:22   (  -0.09,-128.19) (  -0.69,-125.60)  295.57                80
 01/04/2022   06:13:01   (   0.08,-128.20) (  -0.36,-130.19)  225.82                80
 01/05/2022   05:49:42   (   0.08,-128.22) (   0.77,-125.20)  345.04                80
 01/06/2022   18:11:12   (  -0.06,-128.25) (   0.27,-129.75)  170.56                80
 01/07/2022   17:47:53   (  -0.07,-128.27) (  -0.87,-124.76)  400.44                80
 01/09/2022   06:09:32   (   0.06,-128.29) (  -0.18,-129.35)  120.89                80