Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 5 4.  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)
 05/05/2021   15:51:58   (  70.63, -59.78) 05/05/2021   15:53:04  (  70.50, -57.34)   91.57                66
 05/05/2021   16:42:22   ( -69.63, 109.10) 05/05/2021   16:42:48  ( -69.62, 109.04)    2.52                26
 05/05/2021   17:33:06   (  69.53, -83.44) 05/05/2021   17:32:15  (  69.51, -83.45)    1.74                51
 05/08/2021   08:58:41   ( -69.66,-135.01) 05/08/2021   08:59:13  ( -69.65,-135.03)    1.61                32
 05/08/2021   09:49:25   (  69.56,  32.45) 05/08/2021   09:48:40  (  69.54,  32.47)    2.11                45
 05/11/2021   01:15:01   ( -69.69, -19.12) 05/11/2021   01:15:39  ( -69.67, -19.12)    2.07                38
 05/11/2021   02:05:44   (  69.54, 148.42) 05/11/2021   02:05:06  (  69.56, 148.38)    3.17                38
 05/13/2021   17:31:20   ( -69.67,  96.84) 05/13/2021   17:32:05  ( -69.69,  96.79)    3.00                45
 05/13/2021   18:22:04   (  69.57, -95.70) 05/13/2021   18:21:32  (  69.58, -95.72)    1.16                32
 05/16/2021   09:47:40   ( -69.71,-147.27) 05/16/2021   09:48:31  ( -69.71,-147.31)    1.30                51
 05/16/2021   10:38:24   (  69.61,  20.19) 05/16/2021   10:37:58  (  69.59,  20.18)    2.10                26