Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 12 24.  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)
 12/25/2020   07:08:14   (  69.52,  72.03) 12/25/2020   07:09:26  (  69.42,  72.55)   23.06                72
 12/25/2020   07:58:51   ( -69.19,-120.18) 12/25/2020   07:58:58  ( -69.19,-120.11)    2.84                 7
 12/25/2020   08:49:34   (  69.04,  47.34) 12/25/2020   08:48:26  (  69.03,  47.33)    0.56                68
 12/27/2020   23:24:40   (  69.77,-172.42) 12/27/2020   23:25:50  (  69.67,-171.23)   47.19                70
 12/28/2020   00:15:12   ( -69.18,  -4.24) 12/28/2020   00:15:27  ( -69.17,  -4.26)    1.32                15
 12/28/2020   01:05:56   (  69.08, 163.21) 12/28/2020   01:04:54  (  69.06, 163.24)    2.58                62
 12/30/2020   15:41:06   (  70.03, -56.88) 12/30/2020   15:42:14  (  69.91, -55.02)   72.25                68
 12/30/2020   16:31:33   ( -69.17, 111.69) 12/30/2020   16:31:55  ( -69.20, 111.65)    2.96                22
 12/30/2020   17:22:17   (  69.08, -80.86) 12/30/2020   17:21:22  (  69.09, -80.85)    1.19                55
 01/02/2021   07:57:32   (  70.29,  58.64) 01/02/2021   07:58:37  (  70.20,  61.27)   99.50                65
 01/02/2021   08:47:55   ( -69.23,-132.45) 01/02/2021   08:48:23  ( -69.22,-132.44)    1.00                28
 01/02/2021   09:38:39   (  69.13,  35.00) 01/02/2021   09:37:50  (  69.10,  35.05)    3.35                49
 01/05/2021   01:04:15   ( -69.23, -16.53) 01/05/2021   01:04:50  ( -69.23, -16.55)    1.06                35
 01/05/2021   01:54:59   (  69.13, 150.93) 01/05/2021   01:54:17  (  69.11, 150.95)    1.48                42