Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 5 11.  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)
 05/13/2021   17:31:20   ( -69.69,  96.83) 05/13/2021   17:32:05  ( -69.69,  96.78)    1.65                45
 05/13/2021   18:22:04   (  69.58, -95.70) 05/13/2021   18:21:32  (  69.58, -95.72)    0.75                32
 05/16/2021   09:47:40   ( -69.73,-147.29) 05/16/2021   09:48:31  ( -69.71,-147.31)    2.46                51
 05/16/2021   10:38:24   (  69.62,  20.18) 05/16/2021   10:37:58  (  69.59,  20.18)    2.37                26
 05/16/2021   11:28:49   ( -68.67,-171.17) 05/16/2021   11:27:42  ( -68.71,-173.33)   87.49                67
 05/19/2021   02:04:00   ( -69.77, -31.41) 05/19/2021   02:04:56  ( -69.77, -31.34)    2.83                56
 05/19/2021   02:54:42   (  69.60, 136.14) 05/19/2021   02:54:23  (  69.60, 136.07)    2.39                19
 05/19/2021   03:45:12   ( -68.92, -55.57) 05/19/2021   03:44:03  ( -68.94, -57.15)   63.28                69
 05/21/2021   18:20:18   ( -69.76,  84.54) 05/21/2021   18:21:21  ( -69.78,  84.55)    2.30                63
 05/21/2021   19:11:02   (  69.65,-107.99) 05/21/2021   19:10:48  (  69.66,-107.97)    1.55                14
 05/21/2021   20:01:36   ( -69.18,  60.01) 05/21/2021   20:00:24  ( -69.23,  59.09)   36.75                72
 05/24/2021   10:36:38   ( -69.80,-159.59) 05/24/2021   10:37:47  ( -69.78,-159.57)    2.84                69
 05/24/2021   11:27:21   (  69.64,   7.96) 05/24/2021   11:27:14  (  69.66,   7.91)    2.35                 7
 05/24/2021   12:17:59   ( -69.38, 175.66) 05/24/2021   12:16:46  ( -69.45, 175.26)   17.07                73