Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 6 16.  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)
 06/17/2021   13:54:15   (  69.88, -28.93) 06/17/2021   13:55:06  (  69.88, -28.86)    2.47                51
 06/17/2021   14:44:56   ( -69.78, 138.54) 06/17/2021   14:44:36  ( -69.76, 138.62)    3.16                20
 06/17/2021   15:35:24   (  68.82, -52.78) 06/17/2021   15:34:17  (  68.88, -54.90)   85.58                67
 06/20/2021   06:10:33   (  69.89,  87.00) 06/20/2021   06:11:32  (  69.86,  86.99)    2.86                59
 06/20/2021   07:01:14   ( -69.78,-105.52) 06/20/2021   07:01:02  ( -69.75,-105.52)    3.11                12
 06/20/2021   07:51:47   (  69.09,  62.78) 06/20/2021   07:50:38  (  69.14,  61.31)   58.71                69
 06/22/2021   22:26:52   (  69.90,-157.07) 06/22/2021   22:27:58  (  69.89,-157.08)    0.39                66
 06/22/2021   23:17:33   ( -69.78,  10.42) 06/22/2021   23:17:28  ( -69.79,  10.41)    0.67                 5
 06/23/2021   00:08:11   (  69.37, 178.33) 06/23/2021   00:06:59  (  69.45, 177.60)   30.28                72
 06/25/2021   14:43:12   (  69.96, -41.23) 06/25/2021   14:44:24  (  69.92, -41.16)    5.00                72
 06/25/2021   15:33:53   ( -69.84, 126.27) 06/25/2021   15:33:54  ( -69.82, 126.33)    3.31                 1
 06/25/2021   16:24:35   (  69.65, -66.13) 06/25/2021   16:23:22  (  69.65, -66.26)    5.12                73
 06/28/2021   06:59:36   (  70.24,  74.28) 06/28/2021   07:00:47  (  70.11,  74.98)   30.01                71
 06/28/2021   07:50:12   ( -69.85,-117.80) 06/28/2021   07:50:20  ( -69.85,-117.75)    1.82                 8
 06/28/2021   08:40:55   (  69.71,  49.71) 06/28/2021   08:39:47  (  69.73,  49.73)    1.59                68