Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2021 6 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 07/01/2021   07:03:16   (   0.10,-128.23) (   0.03,-128.59)   40.01                80
 07/03/2021   06:48:23   (   0.11,-128.19) (   0.68,-125.63)  291.25                80
 07/03/2021   19:09:37   (  -0.10,-128.15) (   0.47,-130.78)  299.05                80
 07/05/2021   19:00:04   (  -0.10,-128.10) (  -0.18,-127.83)   31.95                80
 07/07/2021   18:47:50   (  -0.10,-128.05) (  -0.78,-124.86)  362.03                80
 07/08/2021   07:09:13   (   0.09,-128.06) (  -0.36,-130.05)  226.20                80
 07/10/2021   06:54:20   (   0.10,-128.00) (   0.30,-127.09)  102.93                80
 07/10/2021   19:15:33   (  -0.08,-127.94) (   0.85,-132.24)  489.29                80
 07/12/2021   06:42:06   (   0.11,-127.93) (   0.91,-124.13)  431.55                80
 07/12/2021   19:03:21   (  -0.09,-127.87) (   0.19,-129.29)  160.59                80