Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 9 13.  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)
 09/13/2021   17:50:48   (  -0.27,-128.07) (  -0.98,-124.79)  373.10                80
 09/15/2021   06:07:09   (   0.29,-128.08) (  -0.01,-129.39)  150.50                80
 09/16/2021   05:49:10   (   0.27,-128.05) (   1.10,-124.40)  416.05                80
 09/17/2021   18:05:21   (  -0.30,-127.96) (  -0.09,-128.96)  113.93                80
 09/18/2021   17:47:22   (  -0.28,-127.93) (  -1.20,-123.96)  452.79                80
 09/20/2021   06:03:42   (   0.31,-127.94) (   0.15,-128.55)   70.75                80
 09/21/2021   05:45:43   (   0.30,-127.91) (   1.26,-123.56)  495.80                80
 09/22/2021   18:01:54   (  -0.32,-127.82) (  -0.25,-128.12)   34.39                80
 09/25/2021   06:02:56   (   0.33,-127.79) (   0.37,-127.72)    8.87                80