Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 5 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)
 05/24/2021   10:36:38   ( -69.80,-159.58) 05/24/2021   10:37:47  ( -69.76,-159.59)    3.57                69
 05/24/2021   11:27:22   (  69.68,   7.90) 05/24/2021   11:27:14  (  69.66,   7.91)    2.59                 8
 05/24/2021   12:17:59   ( -69.37, 175.67) 05/24/2021   12:16:46  ( -69.43, 175.25)   17.80                73
 05/27/2021   02:52:59   ( -69.89, -43.79) 05/27/2021   02:54:11  ( -69.87, -43.56)    9.06                72
 05/27/2021   03:43:41   (  69.67, 123.85) 05/27/2021   03:43:39  (  69.70, 123.85)    2.91                 2
 05/27/2021   04:34:22   ( -69.58, -68.69) 05/27/2021   04:33:09  ( -69.59, -68.66)    1.74                73
 05/29/2021   19:09:22   ( -70.15,  71.76) 05/29/2021   19:10:33  ( -70.02,  72.53)   32.96                71
 05/29/2021   19:59:59   (  69.67,-120.21) 05/29/2021   20:00:04  (  69.68,-120.28)    3.22                 5
 05/29/2021   20:50:40   ( -69.58,  47.26) 05/29/2021   20:49:34  ( -69.58,  47.21)    1.96                66
 06/01/2021   11:25:45   ( -70.36,-172.63) 06/01/2021   11:26:54  ( -70.28,-171.22)   53.86                69
 06/01/2021   12:16:19   (  69.73,  -4.35) 06/01/2021   12:16:29  (  69.72,  -4.35)    1.00                10
 06/01/2021   13:07:00   ( -69.63, 163.12) 06/01/2021   13:05:59  ( -69.62, 163.14)    1.42                61
 06/04/2021   03:42:08   ( -70.57, -57.03) 06/04/2021   03:43:16  ( -70.47, -55.05)   74.45                68
 06/04/2021   04:32:38   (  69.73, 111.58) 06/04/2021   04:32:54  (  69.75, 111.57)    1.73                16
 06/04/2021   05:23:19   ( -69.63, -80.94) 06/04/2021   05:22:24  ( -69.65, -80.93)    2.27                55