Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 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)
 12/21/2021   06:00:07   (   0.13,-127.85) (   0.16,-127.69)   18.55                80
 12/22/2021   18:21:39   (  -0.11,-127.91) (   0.86,-132.25)  494.95                80
 12/23/2021   17:58:19   (  -0.12,-127.94) (  -0.27,-127.26)   77.35                80
 12/25/2021   06:19:58   (   0.10,-127.97) (  -0.78,-131.85)  441.89                80
 12/26/2021   05:56:39   (   0.11,-128.00) (   0.35,-126.86)  130.04                80
 12/27/2021   18:18:10   (  -0.10,-128.05) (   0.65,-131.42)  384.21                80
 12/28/2021   17:54:51   (  -0.11,-128.07) (  -0.48,-126.43)  187.51                80
 12/30/2021   06:16:30   (   0.09,-128.10) (  -0.57,-131.02)  332.82                80
 12/31/2021   05:53:11   (   0.10,-128.12) (   0.57,-126.03)  238.19                80
 01/01/2022   18:14:41   (  -0.09,-128.15) (   0.48,-130.58)  277.73                80
 01/02/2022   17:51:21   (  -0.09,-128.16) (  -0.65,-125.59)  293.09                80