Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 5 20.  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)
 05/21/2021   18:20:19   ( -69.79,  84.49) 05/21/2021   18:21:21  ( -69.78,  84.55)    2.58                62
 05/21/2021   19:11:02   (  69.62,-107.95) 05/21/2021   19:10:49  (  69.62,-108.02)    2.90                13
 05/21/2021   20:01:36   ( -69.16,  60.04) 05/21/2021   20:00:25  ( -69.17,  59.02)   40.29                71
 05/24/2021   10:36:38   ( -69.78,-159.55) 05/24/2021   10:37:47  ( -69.78,-159.57)    0.62                69
 05/24/2021   11:27:22   (  69.66,   7.93) 05/24/2021   11:27:14  (  69.67,   7.93)    0.44                 8
 05/24/2021   12:17:59   ( -69.36, 175.69) 05/24/2021   12:16:46  ( -69.45, 175.26)   19.50                73
 05/27/2021   02:53:00   ( -69.93, -43.84) 05/27/2021   02:54:11  ( -69.88, -43.54)   12.41                71
 05/27/2021   03:43:41   (  69.71, 123.80) 05/27/2021   03:43:38  (  69.71, 123.87)    2.79                 3
 05/27/2021   04:34:21   ( -69.56, -68.66) 05/27/2021   04:33:09  ( -69.55, -68.72)    2.45                72
 05/29/2021   19:09:22   ( -70.13,  71.79) 05/29/2021   19:10:33  ( -70.03,  72.55)   30.96                71
 05/29/2021   20:00:00   (  69.71,-120.26) 05/29/2021   20:00:04  (  69.69,-120.27)    1.41                 4
 05/29/2021   20:50:41   ( -69.61,  47.21) 05/29/2021   20:49:34  ( -69.59,  47.22)    1.85                67
 06/01/2021   11:25:45   ( -70.34,-172.60) 06/01/2021   11:26:55  ( -70.23,-171.28)   50.69                70
 06/01/2021   12:16:19   (  69.71,  -4.32) 06/01/2021   12:16:29  (  69.73,  -4.34)    2.59                10
 06/01/2021   13:07:00   ( -69.60, 163.15) 06/01/2021   13:05:59  ( -69.63, 163.15)    2.62                61