Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2021 6 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 06/28/2021   18:54:06   (  -0.11,-128.27) (  -0.52,-126.35)  217.45                80
 06/29/2021   07:15:30   (   0.10,-128.28) (  -0.57,-131.55)  371.33                80
 07/01/2021   07:03:16   (   0.11,-128.24) (   0.02,-128.59)   39.51                80
 07/03/2021   06:48:23   (   0.11,-128.20) (   0.68,-125.63)  292.10                80
 07/03/2021   19:09:37   (  -0.10,-128.16) (   0.48,-130.78)  298.35                80
 07/05/2021   19:00:04   (  -0.10,-128.11) (  -0.18,-127.83)   32.96                80
 07/07/2021   18:47:50   (  -0.10,-128.06) (  -0.78,-124.86)  363.47                80
 07/08/2021   07:09:14   (   0.09,-128.08) (  -0.30,-130.06)  224.40                80
 07/10/2021   06:54:20   (   0.10,-128.02) (   0.31,-127.10)  105.10                80
 07/10/2021   19:15:33   (  -0.09,-127.96) (   0.85,-132.24)  487.34                80