Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 10 3.  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)
 10/03/2020   04:59:27   (  69.03, 104.54) 10/03/2020   05:00:08  (  69.06, 104.57)    3.19                41
 10/03/2020   05:50:08   ( -68.94, -88.01) 10/03/2020   05:49:38  ( -68.95, -87.95)    2.69                30
 10/05/2020   21:15:50   (  69.06,-139.58) 10/05/2020   21:16:37  (  69.05,-139.56)    1.29                47
 10/05/2020   22:06:31   ( -68.97,  27.87) 10/05/2020   22:06:07  ( -68.95,  27.93)    3.35                24
 10/05/2020   22:56:57   (  67.88,-163.40) 10/05/2020   22:55:50  (  67.94,-165.64)   94.12                67
 10/08/2020   13:32:12   (  69.04, -23.64) 10/08/2020   13:33:06  (  69.04, -23.70)    2.44                54
 10/08/2020   14:22:53   ( -68.94, 143.82) 10/08/2020   14:22:36  ( -68.94, 143.80)    0.96                17
 10/08/2020   15:13:23   (  68.07, -47.73) 10/08/2020   15:12:15  (  68.16, -49.51)   74.69                68
 10/11/2020   05:48:35   (  69.08,  92.23) 10/11/2020   05:49:34  (  69.08,  92.23)    0.94                59
 10/11/2020   06:39:16   ( -68.97,-100.30) 10/11/2020   06:39:04  ( -68.98,-100.26)    2.17                12
 10/11/2020   07:29:50   (  68.32,  67.87) 10/11/2020   07:28:40  (  68.36,  66.61)   51.81                70
 10/13/2020   22:04:57   (  69.11,-151.90) 10/13/2020   22:06:01  (  69.12,-151.84)    2.54                64
 10/13/2020   22:55:38   ( -69.00,  15.58) 10/13/2020   22:55:32  ( -68.97,  15.60)    3.31                 6
 10/13/2020   23:46:15   (  68.52,-176.47) 10/13/2020   23:45:04  (  68.57,-177.26)   32.57                71
 10/16/2020   14:21:19   (  69.09, -35.96) 10/16/2020   14:22:30  (  69.10, -35.99)    1.33                71
 10/16/2020   15:12:00   ( -68.97, 131.53) 10/16/2020   15:12:00  ( -69.00, 131.52)    3.16                 0
 10/16/2020   16:02:41   (  68.72, -60.81) 10/16/2020   16:01:29  (  68.77, -61.13)   13.89                72