Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 11 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)
 11/21/2019   21:58:50   (  68.86,-150.72) 11/21/2019   21:59:41  (  68.84,-150.66)    3.40                51
 11/21/2019   22:49:31   ( -68.71,  16.80) 11/21/2019   22:49:12  ( -68.68,  16.78)    3.29                19
 11/21/2019   23:40:00   (  67.83,-174.76) 11/21/2019   23:38:52  (  67.84,-176.58)   76.45                68
 11/24/2019   14:15:15   (  68.83, -34.78) 11/24/2019   14:16:11  (  68.81, -34.81)    1.80                56
 11/24/2019   15:05:57   ( -68.73, 132.66) 11/24/2019   15:05:41  ( -68.71, 132.70)    2.41                16
 11/24/2019   15:56:28   (  67.96, -59.03) 11/24/2019   15:55:19  (  67.98, -60.54)   62.94                69
 11/27/2019   06:31:40   (  68.85,  81.08) 11/27/2019   06:32:40  (  68.82,  81.08)    3.63                60
 11/27/2019   07:22:21   ( -68.70,-111.40) 11/27/2019   07:22:10  ( -68.72,-111.41)    2.34                11
 11/27/2019   08:12:55   (  68.09,  56.70) 11/27/2019   08:11:45  (  68.16,  55.54)   48.32                70
 11/29/2019   22:48:05   (  68.83,-162.99) 11/29/2019   22:49:10  (  68.86,-163.00)    3.43                65
 11/29/2019   23:38:47   ( -68.73,   4.46) 11/29/2019   23:38:41  ( -68.71,   4.44)    2.65                 6
 11/30/2019   00:29:24   (  68.28, 172.35) 11/30/2019   00:28:12  (  68.36, 171.66)   29.65                72
 12/02/2019   15:04:31   (  68.85, -47.14) 12/02/2019   15:05:41  (  68.87, -47.12)    1.61                70
 12/02/2019   15:55:12   ( -68.70, 120.38) 12/02/2019   15:55:12  ( -68.72, 120.33)    2.74                 0
 12/02/2019   16:45:53   (  68.47, -72.00) 12/02/2019   16:44:40  (  68.54, -72.25)   12.64                73