Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2021 6 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 06/19/2021   19:00:21   (  -0.10,-128.41) (  -0.25,-127.84)   65.38                80
 06/21/2021   18:48:07   (  -0.10,-128.39) (  -0.82,-124.87)  399.06                80
 06/22/2021   07:09:31   (   0.10,-128.40) (  -0.27,-130.07)  189.77                80
 06/24/2021   06:54:38   (   0.10,-128.37) (   0.37,-127.12)  142.67                80
 06/24/2021   19:15:53   (  -0.09,-128.33) (   0.73,-132.27)  447.60                80
 06/26/2021   06:42:25   (   0.11,-128.33) (   1.01,-124.16)  474.58                80
 06/26/2021   19:03:40   (  -0.10,-128.30) (   0.09,-129.32)  115.60                80
 06/28/2021   18:54:06   (  -0.11,-128.26) (  -0.50,-126.35)  216.40                80
 06/29/2021   07:15:29   (   0.10,-128.28) (  -0.59,-131.55)  371.12                80
 07/01/2021   07:03:16   (   0.11,-128.25) (   0.06,-128.59)   39.28                80