Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 4 17.  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)
 04/19/2021   14:13:43   (  69.66, -33.89) 04/19/2021   14:14:39  (  69.65, -33.81)    2.93                56
 04/19/2021   15:04:24   ( -69.52, 133.63) 04/19/2021   15:04:09  ( -69.54, 133.67)    2.34                15
 04/19/2021   15:54:56   (  68.81, -58.05) 04/19/2021   15:53:47  (  68.82, -59.61)   62.86                69
 04/22/2021   06:30:03   (  69.67,  82.03) 04/22/2021   06:31:06  (  69.66,  82.08)    1.91                63
 04/22/2021   07:20:44   ( -69.53,-110.45) 04/22/2021   07:20:36  ( -69.55,-110.43)    2.22                 8
 04/22/2021   08:11:20   (  69.03,  57.58) 04/22/2021   08:10:09  (  69.11,  56.63)   38.62                71
 04/24/2021   22:46:23   (  69.68,-162.05) 04/24/2021   22:47:33  (  69.67,-162.03)    1.07                70
 04/24/2021   23:37:04   ( -69.55,   5.46) 04/24/2021   23:37:03  ( -69.56,   5.46)    1.82                 1
 04/25/2021   00:27:45   (  69.31, 173.12) 04/25/2021   00:26:32  (  69.34, 172.81)   12.84                73
 04/27/2021   15:02:46   (  69.85, -46.37) 04/27/2021   15:03:58  (  69.78, -46.00)   15.93                72
 04/27/2021   15:53:24   ( -69.56, 121.38) 04/27/2021   15:53:30  ( -69.57, 121.34)    1.80                 6
 04/27/2021   16:44:08   (  69.48, -71.19) 04/27/2021   16:42:57  (  69.45, -71.17)    3.23                71
 04/30/2021   07:19:10   (  70.13,  69.15) 04/30/2021   07:20:20  (  70.00,  70.18)   41.66                70
 04/30/2021   08:09:44   ( -69.63,-122.78) 04/30/2021   08:09:55  ( -69.62,-122.71)    2.86                11
 04/30/2021   09:00:27   (  69.49,  44.73) 04/30/2021   08:59:22  (  69.50,  44.78)    2.43                65