Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 12 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)
 12/30/2020   15:41:06   (  70.04, -56.90) 12/30/2020   15:42:14  (  69.90, -55.04)   72.57                68
 12/30/2020   16:31:33   ( -69.19, 111.67) 12/30/2020   16:31:55  ( -69.18, 111.63)    1.97                22
 12/30/2020   17:22:17   (  69.08, -80.87) 12/30/2020   17:21:22  (  69.07, -80.86)    1.09                55
 01/02/2021   07:57:32   (  70.30,  58.63) 01/02/2021   07:58:37  (  70.19,  61.26)   99.48                65
 01/02/2021   08:47:54   ( -69.18,-132.39) 01/02/2021   08:48:23  ( -69.20,-132.47)    3.52                29
 01/02/2021   09:38:38   (  69.08,  35.06) 01/02/2021   09:37:50  (  69.09,  35.04)    1.80                48
 01/05/2021   01:04:16   ( -69.23, -16.54) 01/05/2021   01:04:51  ( -69.22, -16.57)    2.29                35
 01/05/2021   01:55:00   (  69.13, 150.92) 01/05/2021   01:54:18  (  69.10, 150.93)    2.86                42
 01/07/2021   17:20:36   ( -69.23,  99.39) 01/07/2021   17:21:18  ( -69.23,  99.32)    2.76                42
 01/07/2021   18:11:20   (  69.13, -93.15) 01/07/2021   18:10:45  (  69.11, -93.18)    2.34                35
 01/10/2021   09:36:58   ( -69.29,-144.76) 01/10/2021   09:37:45  ( -69.28,-144.72)    1.74                47
 01/10/2021   10:27:41   (  69.13,  22.77) 01/10/2021   10:27:13  (  69.11,  22.70)    3.58                28