Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 6 29.  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)
 06/30/2021   06:00:02   (   0.13,-128.24) (   0.21,-127.74)   56.38                80
 07/01/2021   18:18:54   (  -0.12,-128.21) (   0.81,-132.30)  466.97                80
 07/02/2021   18:00:56   (  -0.13,-128.19) (  -0.33,-127.32)  100.00                80
 07/04/2021   06:19:56   (   0.12,-128.16) (  -0.72,-131.90)  426.41                80
 07/05/2021   05:56:38   (   0.13,-128.13) (   0.43,-126.92)  139.48                80
 07/06/2021   18:15:29   (  -0.12,-128.09) (   0.65,-131.46)  385.47                80
 07/07/2021   17:57:30   (  -0.13,-128.06) (  -0.49,-126.48)  180.72                80
 07/09/2021   06:16:31   (   0.12,-128.03) (  -0.55,-131.07)  346.16                80
 07/10/2021   05:53:11   (   0.13,-127.99) (   0.54,-126.07)  218.81                80
 07/11/2021   18:12:04   (  -0.13,-127.93) (   0.49,-130.63)  308.08                80
 07/12/2021   17:54:05   (  -0.14,-127.89) (  -0.66,-125.64)  257.37                80