Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2021 6 28.  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   18:54:05   (  -0.11,-128.27) (  -0.48,-126.35)  217.46                80
 06/29/2021   07:15:29   (   0.10,-128.28) (  -0.60,-131.54)  371.46                80
 07/01/2021   07:03:16   (   0.11,-128.24) (   0.05,-128.59)   39.78                80
 07/03/2021   06:48:22   (   0.11,-128.19) (   0.64,-125.62)  291.73                80
 07/03/2021   19:09:37   (  -0.10,-128.15) (   0.46,-130.78)  298.64                80
 07/05/2021   19:00:03   (  -0.10,-128.11) (  -0.14,-127.82)   32.54                80
 07/07/2021   18:47:50   (  -0.10,-128.05) (  -0.80,-124.87)  362.93                80
 07/08/2021   07:09:13   (   0.09,-128.07) (  -0.34,-130.05)  225.07                80
 07/10/2021   06:54:19   (   0.10,-128.01) (   0.27,-127.09)  104.31                80
 07/10/2021   19:15:34   (  -0.09,-127.95) (   0.83,-132.24)  488.06                80