Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 12 21.  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)
 12/22/2020   14:51:49   (  69.29, -43.56) 12/22/2020   14:53:00  (  69.30, -43.48)    3.53                71
 12/22/2020   15:42:29   ( -69.11, 124.00) 12/22/2020   15:42:31  ( -69.13, 123.93)    3.21                 2
 12/22/2020   16:33:12   (  68.97, -68.49) 12/22/2020   16:31:59  (  68.97, -68.63)    5.68                73
 12/25/2020   07:08:15   (  69.54,  72.00) 12/25/2020   07:09:26  (  69.45,  72.59)   25.12                71
 12/25/2020   07:58:51   ( -69.15,-120.13) 12/25/2020   07:58:59  ( -69.17,-120.14)    1.85                 8
 12/25/2020   08:49:35   (  69.06,  47.31) 12/25/2020   08:48:26  (  69.06,  47.36)    2.08                69
 12/27/2020   23:24:41   (  69.79,-172.44) 12/27/2020   23:25:51  (  69.64,-171.27)   48.15                70
 12/28/2020   00:15:13   ( -69.19,  -4.26) 12/28/2020   00:15:27  ( -69.20,  -4.22)    1.85                14
 12/28/2020   01:05:56   (  69.04, 163.26) 12/28/2020   01:04:55  (  69.03, 163.21)    2.19                61
 12/30/2020   15:41:06   (  70.04, -56.90) 12/30/2020   15:42:13  (  69.94, -54.98)   73.90                67
 12/30/2020   16:31:33   ( -69.18, 111.68) 12/30/2020   16:31:55  ( -69.17, 111.62)    2.56                22
 12/30/2020   17:22:17   (  69.08, -80.87) 12/30/2020   17:21:22  (  69.06, -80.88)    2.78                55
 01/02/2021   07:57:31   (  70.24,  58.72) 01/02/2021   07:58:37  (  70.18,  61.24)   95.13                66
 01/02/2021   08:47:55   ( -69.22,-132.45) 01/02/2021   08:48:23  ( -69.20,-132.47)    3.13                28
 01/02/2021   09:38:38   (  69.07,  35.07) 01/02/2021   09:37:50  (  69.08,  35.02)    2.04                48