Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 5 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)
 05/02/2021   23:35:34   (  70.38,-175.32) 05/02/2021   23:36:42  (  70.26,-173.57)   66.81                68
 05/03/2021   00:26:03   ( -69.64,  -6.86) 05/03/2021   00:26:21  ( -69.65,  -6.80)    2.47                18
 05/03/2021   01:16:46   (  69.49, 160.67) 05/03/2021   01:15:49  (  69.49, 160.64)    1.55                57
 05/05/2021   15:51:58   (  70.62, -59.76) 05/05/2021   15:53:04  (  70.51, -57.33)   90.79                66
 05/05/2021   16:42:22   ( -69.61, 109.12) 05/05/2021   16:42:48  ( -69.63, 109.06)    3.04                26
 05/05/2021   17:33:06   (  69.51, -83.42) 05/05/2021   17:32:15  (  69.52, -83.44)    0.92                51
 05/08/2021   08:58:41   ( -69.64,-134.98) 05/08/2021   08:59:13  ( -69.66,-135.02)    2.64                32
 05/08/2021   09:49:25   (  69.54,  32.47) 05/08/2021   09:48:40  (  69.54,  32.47)    0.54                45
 05/11/2021   01:15:01   ( -69.66, -19.08) 05/11/2021   01:15:39  ( -69.68, -19.11)    1.85                38
 05/11/2021   02:05:45   (  69.57, 148.37) 05/11/2021   02:05:06  (  69.56, 148.38)    0.46                39
 05/13/2021   17:31:21   ( -69.69,  96.81) 05/13/2021   17:32:05  ( -69.69,  96.79)    0.74                44
 05/13/2021   18:22:05   (  69.60, -95.73) 05/13/2021   18:21:32  (  69.58, -95.72)    2.14                33