Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 10 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)
 10/21/2020   22:54:11   (  69.51,-164.71) 10/21/2020   22:55:22  (  69.36,-163.90)   35.57                71
 10/21/2020   23:44:45   ( -69.01,   3.32) 10/21/2020   23:44:56  ( -69.03,   3.31)    3.09                11
 10/22/2020   00:35:29   (  68.92, 170.75) 10/22/2020   00:34:23  (  68.92, 170.80)    2.22                66
 10/24/2020   15:10:36   (  69.71, -49.09) 10/24/2020   15:11:45  (  69.59, -47.71)   54.98                69
 10/24/2020   16:01:07   ( -69.05, 119.18) 10/24/2020   16:01:23  ( -69.05, 119.20)    0.90                16
 10/24/2020   16:51:50   (  68.91, -73.32) 10/24/2020   16:50:50  (  68.93, -73.30)    2.02                60
 10/27/2020   07:27:02   (  69.92,  66.52) 10/27/2020   07:28:09  (  69.82,  68.48)   75.75                67
 10/27/2020   08:17:29   ( -69.03,-124.88) 10/27/2020   08:17:51  ( -69.05,-124.91)    2.46                22
 10/27/2020   09:08:12   (  68.91,  42.60) 10/27/2020   09:07:18  (  68.93,  42.58)    3.06                54
 10/29/2020   23:43:28   (  70.13,-177.88) 10/29/2020   23:44:34  (  69.98,-175.42)   94.87                66
 10/30/2020   00:33:52   ( -69.08,  -9.03) 10/30/2020   00:34:19  ( -69.05,  -9.03)    2.60                27
 10/30/2020   01:24:35   (  68.95, 158.45) 10/30/2020   01:23:46  (  68.93, 158.46)    2.86                49
 11/01/2020   16:50:14   ( -69.07, 106.90) 11/01/2020   16:50:47  ( -69.05, 106.85)    3.44                33
 11/01/2020   17:40:57   (  68.95, -85.62) 11/01/2020   17:40:13  (  68.98, -85.60)    2.78                44
 11/04/2020   09:06:35   ( -69.06,-137.17) 11/04/2020   09:07:13  ( -69.09,-137.22)    3.15                38
 11/04/2020   09:57:18   (  68.95,  30.30) 11/04/2020   09:56:40  (  68.96,  30.27)    1.50                38