Simultaneous Nadir Overpasses (SNOs) between GOES-17 and TERRA
TLE Epoch: 2021 1 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 01/13/2021   19:30:39   (   0.01,-137.23) (  -0.35,-135.60)  185.71                80
 01/14/2021   07:54:43   (  -0.01,-137.22) (  -0.75,-140.79)  405.61                80
 01/16/2021   07:42:30   (  -0.01,-137.22) (  -0.17,-137.82)   69.40                80
 01/18/2021   07:27:38   (  -0.01,-137.22) (   0.47,-134.87)  266.82                80
 01/18/2021   19:51:33   (   0.01,-137.23) (   0.58,-140.03)  318.60                80
 01/20/2021   19:36:41   (   0.01,-137.22) (  -0.01,-137.07)   17.11                80
 01/22/2021   19:24:29   (   0.02,-137.21) (  -0.66,-134.12)  352.13                80
 01/23/2021   07:48:32   (  -0.02,-137.19) (  -0.44,-139.31)  239.63                80
 01/25/2021   07:33:39   (  -0.02,-137.17) (   0.16,-136.34)   94.43                80
 01/25/2021   19:57:34   (   0.03,-137.18) (   0.96,-141.50)  491.63                80