Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 7 1.  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)
 07/03/2021   15:32:22   (  70.73, -54.61) 07/03/2021   15:33:29  (  70.66, -52.46)   79.59                67
 07/03/2021   16:22:49   ( -69.87, 114.06) 07/03/2021   16:23:11  ( -69.88, 114.06)    1.63                22
 07/03/2021   17:13:33   (  69.78, -78.50) 07/03/2021   17:12:38  (  69.78, -78.44)    2.21                55
 07/06/2021   08:39:08   ( -69.88,-130.02) 07/06/2021   08:39:37  ( -69.89,-130.04)    1.89                29
 07/06/2021   09:29:52   (  69.80,  37.42) 07/06/2021   09:29:04  (  69.78,  37.45)    2.18                48
 07/09/2021   00:55:26   ( -69.89, -14.09) 07/09/2021   00:56:02  ( -69.90, -14.16)    2.58                36
 07/09/2021   01:46:10   (  69.82, 153.33) 07/09/2021   01:45:28  (  69.84, 153.40)    3.63                42
 07/11/2021   17:11:46   ( -69.96, 101.75) 07/11/2021   17:12:27  ( -69.95, 101.80)    2.04                41
 07/11/2021   18:02:29   (  69.84, -90.76) 07/11/2021   18:01:54  (  69.83, -90.72)    1.56                35
 07/14/2021   09:28:05   ( -69.97,-142.33) 07/14/2021   09:28:53  ( -69.94,-142.33)    3.33                48
 07/14/2021   10:18:48   (  69.86,  25.15) 07/14/2021   10:18:19  (  69.88,  25.23)    3.50                29