Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 7 22.  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)
 07/24/2021   06:06:13   (   0.10,-127.65) (  -0.08,-128.54)  100.97                80
 07/25/2021   05:42:55   (   0.12,-127.68) (   1.07,-123.56)  471.00                80
 07/26/2021   18:04:26   (  -0.10,-127.69) (   0.01,-128.10)   47.89                80
 07/29/2021   06:00:08   (   0.10,-127.83) (   0.11,-127.71)   13.86                80
 07/31/2021   17:58:22   (  -0.10,-127.86) (  -0.24,-127.28)   65.97                80
 08/02/2021   06:20:02   (   0.07,-127.97) (  -0.78,-131.88)  444.44                80
 08/03/2021   05:56:43   (   0.09,-128.00) (   0.32,-126.88)  126.97                80
 08/04/2021   18:18:15   (  -0.06,-127.97) (   0.70,-131.44)  395.29                80
 08/05/2021   17:54:57   (  -0.08,-128.00) (  -0.45,-126.46)  176.53                80