Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2021 1 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 01/03/2021   18:56:17   (   0.11,-128.23) (  -0.29,-126.31)  217.79                80
 01/04/2021   07:15:01   (  -0.07,-128.20) (  -0.76,-131.51)  375.80                80
 01/06/2021   07:02:49   (  -0.08,-128.19) (  -0.13,-128.56)   41.73                80
 01/08/2021   06:53:17   (  -0.08,-128.16) (   0.44,-125.59)  291.81                80
 01/08/2021   19:11:52   (   0.05,-128.17) (   0.62,-130.75)  293.99                80
 01/10/2021   19:02:20   (   0.05,-128.14) (  -0.01,-127.80)   38.54                80
 01/12/2021   18:50:08   (   0.06,-128.10) (  -0.65,-124.84)  370.74                80
 01/13/2021   07:08:52   (  -0.03,-128.07) (  -0.45,-130.04)  223.96                80
 01/15/2021   06:59:20   (  -0.03,-128.03) (   0.19,-127.08)  108.16                80
 01/15/2021   19:17:56   (  -0.00,-128.04) (   0.86,-132.25)  477.46                80