Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 7 5.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 07/06/2021   08:39:08   ( -69.93,-130.08) 07/06/2021   08:39:36  ( -69.90,-130.03)    3.26                28
 07/06/2021   09:29:51   (  69.79,  37.43) 07/06/2021   09:29:03  (  69.80,  37.47)    1.54                48
 07/09/2021   00:55:27   ( -69.94, -14.16) 07/09/2021   00:56:02  ( -69.91, -14.14)    3.38                35
 07/09/2021   01:46:10   (  69.81, 153.35) 07/09/2021   01:45:29  (  69.80, 153.35)    1.04                41
 07/11/2021   17:11:46   ( -69.95, 101.76) 07/11/2021   17:12:27  ( -69.96, 101.81)    2.39                41
 07/11/2021   18:02:29   (  69.83, -90.74) 07/11/2021   18:01:54  (  69.85, -90.70)    2.99                35
 07/14/2021   09:28:05   ( -69.97,-142.32) 07/14/2021   09:28:53  ( -69.96,-142.31)    0.95                48
 07/14/2021   10:18:48   (  69.85,  25.17) 07/14/2021   10:18:20  (  69.84,  25.17)    0.80                28
 07/14/2021   11:09:12   ( -68.80,-166.02) 07/14/2021   11:08:06  ( -68.85,-168.49)   99.71                66
 07/17/2021   01:44:23   ( -69.98, -26.40) 07/17/2021   01:45:17  ( -70.00, -26.37)    2.57                54
 07/17/2021   02:35:06   (  69.87, 141.08) 07/17/2021   02:34:44  (  69.88, 141.11)    1.92                22