Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 6 28.  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)
 06/28/2021   06:59:36   (  70.24,  74.29) 06/28/2021   07:00:47  (  70.11,  74.99)   29.90                71
 06/28/2021   07:50:12   ( -69.84,-117.78) 06/28/2021   07:50:20  ( -69.83,-117.77)    1.13                 8
 06/28/2021   08:40:55   (  69.71,  49.72) 06/28/2021   08:39:47  (  69.73,  49.73)    1.67                68
 06/30/2021   23:15:58   (  70.47,-170.13) 06/30/2021   23:17:07  (  70.41,-168.71)   53.41                69
 07/01/2021   00:06:30   ( -69.86,  -1.86) 07/01/2021   00:06:45  ( -69.86,  -1.86)    0.04                15
 07/01/2021   00:57:13   (  69.73, 165.64) 07/01/2021   00:56:12  (  69.75, 165.64)    1.52                61
 07/03/2021   15:32:22   (  70.75, -54.65) 07/03/2021   15:33:29  (  70.64, -52.49)   80.62                67
 07/03/2021   16:22:49   ( -69.87, 114.06) 07/03/2021   16:23:11  ( -69.87, 114.04)    0.65                22
 07/03/2021   17:13:32   (  69.75, -78.45) 07/03/2021   17:12:38  (  69.76, -78.47)    0.65                54
 07/06/2021   08:39:08   ( -69.89,-130.03) 07/06/2021   08:39:37  ( -69.88,-130.06)    1.81                29
 07/06/2021   09:29:51   (  69.78,  37.45) 07/06/2021   09:29:04  (  69.76,  37.42)    2.05                47
 07/09/2021   00:55:27   ( -69.92, -14.12) 07/09/2021   00:56:02  ( -69.94, -14.10)    2.73                35
 07/09/2021   01:46:10   (  69.81, 153.35) 07/09/2021   01:45:29  (  69.82, 153.38)    1.74                41
 07/11/2021   17:11:45   ( -69.94, 101.78) 07/11/2021   17:12:27  ( -69.94, 101.78)    0.83                42
 07/11/2021   18:02:28   (  69.84, -90.76) 07/11/2021   18:01:54  (  69.82, -90.74)    2.95                34