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   19:00:20   (  -0.10,-128.41) (  -0.21,-127.84)   65.13                80
 06/21/2021   18:48:07   (  -0.10,-128.39) (  -0.85,-124.88)  398.75                80
 06/22/2021   07:09:31   (   0.10,-128.40) (  -0.24,-130.08)  189.95                80
 06/24/2021   06:54:37   (   0.10,-128.37) (   0.34,-127.11)  142.43                80
 06/24/2021   19:15:52   (  -0.09,-128.33) (   0.76,-132.27)  448.06                80
 06/26/2021   06:42:24   (   0.11,-128.33) (   0.98,-124.15)  474.21                80
 06/26/2021   19:03:39   (  -0.10,-128.29) (   0.12,-129.31)  116.11                80
 06/28/2021   18:54:06   (  -0.11,-128.25) (  -0.53,-126.36)  215.75                80
 06/29/2021   07:15:29   (   0.10,-128.28) (  -0.62,-131.54)  371.68                80
 07/01/2021   07:03:16   (   0.11,-128.24) (   0.03,-128.59)   39.84                80