Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 9 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)
 09/18/2021   17:47:22   (  -0.28,-127.93) (  -1.18,-123.96)  452.73                80
 09/20/2021   06:03:43   (   0.31,-127.93) (   0.19,-128.56)   71.87                80
 09/21/2021   05:45:42   (   0.29,-127.90) (   1.24,-123.55)  494.54                80
 09/22/2021   18:01:54   (  -0.32,-127.81) (  -0.23,-128.11)   35.01                80
 09/25/2021   06:02:56   (   0.33,-127.77) (   0.36,-127.72)    6.83                80
 09/27/2021   18:01:06   (  -0.33,-127.64) (  -0.40,-127.27)   41.68                80
 09/29/2021   06:17:28   (   0.34,-127.63) (  -0.58,-131.88)  483.64                80
 09/30/2021   05:59:27   (   0.33,-127.59) (   0.47,-126.87)   81.58                80
 10/01/2021   18:15:39   (  -0.34,-127.48) (   0.54,-131.43)  450.26                80