Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2021 8 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 08/13/2021   06:41:32   (   0.00,-128.19) (   0.84,-124.11)  462.83                80
 08/13/2021   19:05:27   (   0.03,-128.11) (   0.25,-129.27)  131.02                80
 08/15/2021   18:50:33   (   0.02,-128.14) (  -0.34,-126.31)  208.31                80
 08/16/2021   07:14:37   (  -0.05,-128.24) (  -0.74,-131.50)  371.24                80
 08/18/2021   07:02:24   (  -0.05,-128.26) (  -0.08,-128.55)   33.14                80
 08/20/2021   06:47:30   (  -0.04,-128.27) (   0.52,-125.59)  304.72                80
 08/20/2021   19:11:24   (   0.07,-128.18) (   0.64,-130.73)  290.31                80
 08/22/2021   18:56:31   (   0.06,-128.20) (  -0.03,-127.78)   47.46                80
 08/24/2021   18:44:17   (   0.05,-128.22) (  -0.64,-124.82)  385.31                80
 08/25/2021   07:08:21   (  -0.09,-128.31) (  -0.44,-130.02)  193.89                80