Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 9 12.  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)
 09/12/2021   18:08:48   (  -0.29,-128.09) (   0.12,-129.79)  194.10                80
 09/13/2021   17:50:48   (  -0.27,-128.07) (  -0.99,-124.79)  373.07                80
 09/15/2021   06:07:10   (   0.29,-128.08) (  -0.00,-129.40)  150.49                80
 09/16/2021   05:49:10   (   0.27,-128.05) (   1.11,-124.40)  416.06                80
 09/17/2021   18:05:21   (  -0.30,-127.96) (  -0.10,-128.96)  113.97                80
 09/18/2021   17:47:21   (  -0.28,-127.93) (  -1.15,-123.95)  452.76                80
 09/20/2021   06:03:42   (   0.31,-127.94) (   0.16,-128.55)   70.71                80
 09/21/2021   05:45:43   (   0.30,-127.91) (   1.27,-123.56)  495.80                80
 09/22/2021   18:01:54   (  -0.32,-127.81) (  -0.26,-128.12)   34.41                80
 09/25/2021   06:00:15   (   0.33,-127.79) (   0.32,-127.71)    8.76                80