Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2021 4 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)
 04/18/2021   18:49:04   (   0.07,-127.94) (  -0.57,-124.83)  352.90                80
 04/19/2021   07:10:28   (  -0.06,-127.85) (  -0.53,-130.03)  247.11                80
 04/21/2021   06:55:35   (  -0.06,-127.78) (   0.08,-127.07)   80.85                80
 04/23/2021   06:43:22   (  -0.06,-127.70) (   0.69,-124.11)  408.53                80
 04/23/2021   19:04:38   (   0.06,-127.75) (   0.35,-129.28)  173.43                80
 04/25/2021   18:55:04   (   0.06,-127.67) (  -0.20,-126.31)  154.00                80
 04/26/2021   07:16:28   (  -0.05,-127.59) (  -0.89,-131.50)  445.06                80
 04/27/2021   18:42:51   (   0.06,-127.58) (  -0.82,-123.35)  480.77                80
 04/28/2021   07:04:15   (  -0.05,-127.50) (  -0.27,-128.54)  118.63                80
 04/30/2021   06:49:22   (  -0.05,-127.40) (   0.35,-125.59)  206.97                80
 04/30/2021   19:10:37   (   0.05,-127.43) (   0.75,-130.74)  376.92                80