Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-C
TLE Epoch: 2021 9 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  METOP-C Lat/Lon    Distance(km)  Time Diff(sec)
 09/13/2021   06:03:04   (   0.28,-128.13) (   0.36,-127.76)   41.97                80
 09/14/2021   18:19:14   (  -0.31,-128.04) (   0.62,-132.32)  487.72                80
 09/15/2021   18:01:13   (  -0.29,-128.01) (  -0.41,-127.31)   79.20                80
 09/17/2021   06:17:34   (   0.31,-128.02) (  -0.54,-131.93)  444.62                80
 09/18/2021   05:59:34   (   0.30,-127.99) (   0.56,-126.93)  121.96                80
 09/19/2021   18:15:43   (  -0.32,-127.90) (   0.47,-131.48)  408.18                80
 09/20/2021   17:57:43   (  -0.31,-127.87) (  -0.62,-126.48)  158.56                80
 09/22/2021   06:14:03   (   0.33,-127.88) (  -0.39,-131.08)  364.94                80
 09/23/2021   05:56:02   (   0.32,-127.85) (   0.71,-126.08)  201.49                80
 09/24/2021   18:12:12   (  -0.34,-127.75) (   0.32,-130.64)  329.17                80