Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2021 1 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)
 01/19/2021   18:56:11   (   0.01,-127.96) (  -0.34,-126.32)  186.34                80
 01/20/2021   07:14:54   (   0.02,-127.92) (  -0.77,-131.51)  409.73                80
 01/22/2021   07:02:43   (   0.02,-127.87) (  -0.11,-128.56)   78.95                80
 01/24/2021   06:53:10   (   0.02,-127.81) (   0.48,-125.60)  251.08                80
 01/24/2021   19:11:45   (  -0.06,-127.83) (   0.57,-130.76)  334.17                80
 01/26/2021   18:59:32   (  -0.05,-127.76) (  -0.03,-127.80)    5.15                80
 01/28/2021   18:50:00   (  -0.04,-127.69) (  -0.63,-124.84)  323.74                80
 01/29/2021   07:08:44   (   0.08,-127.63) (  -0.41,-130.04)  273.54                80
 01/31/2021   06:59:11   (   0.08,-127.56) (   0.20,-127.08)   54.78                80