Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 8.  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)
 03/10/2021   09:17:58   ( -69.42,-139.86) 03/10/2021   09:18:34  ( -69.43,-139.91)    2.51                36
 03/10/2021   10:08:42   (  69.34,  27.56) 03/10/2021   10:08:01  (  69.32,  27.59)    2.14                41
 03/13/2021   01:34:18   ( -69.46, -23.99) 03/13/2021   01:35:00  ( -69.45, -24.02)    1.60                42
 03/13/2021   02:25:01   (  69.33, 143.50) 03/13/2021   02:24:27  (  69.34, 143.48)    0.95                34
 03/15/2021   17:50:39   ( -69.50,  91.89) 03/15/2021   17:51:26  ( -69.51,  91.95)    2.89                47
 03/15/2021   18:41:21   (  69.33,-100.55) 03/15/2021   18:40:54  (  69.34,-100.63)    3.42                27
 03/15/2021   19:31:46   ( -68.33,  68.12) 03/15/2021   19:30:39  ( -68.41,  65.82)   94.70                67
 03/18/2021   10:06:59   ( -69.49,-152.17) 03/18/2021   10:07:53  ( -69.52,-152.16)    2.94                54
 03/18/2021   10:57:42   (  69.38,  15.31) 03/18/2021   10:57:20  (  69.40,  15.32)    2.56                22
 03/18/2021   11:48:11   ( -68.59,-176.28) 03/18/2021   11:47:02  ( -68.63,-178.02)   70.64                69
 03/21/2021   02:23:20   ( -69.54, -36.30) 03/21/2021   02:24:20  ( -69.52, -36.29)    2.49                60
 03/21/2021   03:14:02   (  69.38, 131.24) 03/21/2021   03:13:47  (  69.40, 131.20)    2.76                15
 03/21/2021   04:04:35   ( -68.79, -60.63) 03/21/2021   04:03:25  ( -68.85, -61.87)   50.10                70