Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 9 14.  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)
 09/15/2021   06:07:09   (   0.29,-128.08) (  -0.03,-129.39)  150.57                80
 09/16/2021   05:49:10   (   0.27,-128.05) (   1.08,-124.39)  415.99                80
 09/17/2021   18:05:21   (  -0.30,-127.96) (  -0.07,-128.95)  113.92                80
 09/18/2021   17:47:22   (  -0.28,-127.93) (  -1.18,-123.96)  452.78                80
 09/20/2021   06:03:43   (   0.31,-127.94) (   0.19,-128.56)   70.78                80
 09/21/2021   05:45:43   (   0.29,-127.91) (   1.30,-123.57)  495.72                80
 09/22/2021   18:01:54   (  -0.32,-127.81) (  -0.23,-128.11)   34.52                80
 09/25/2021   06:02:56   (   0.33,-127.79) (   0.35,-127.72)    8.31                80
 09/27/2021   18:01:06   (  -0.33,-127.65) (  -0.39,-127.27)   42.93                80