Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 18.  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)
 03/18/2021   10:06:59   ( -69.49,-152.17) 03/18/2021   10:07:53  ( -69.51,-152.18)    1.69                54
 03/18/2021   10:57:42   (  69.37,  15.32) 03/18/2021   10:57:21  (  69.35,  15.25)    3.63                21
 03/18/2021   11:48:11   ( -68.59,-176.29) 03/18/2021   11:47:02  ( -68.62,-178.04)   71.12                69
 03/21/2021   02:23:20   ( -69.53, -36.30) 03/21/2021   02:24:20  ( -69.51, -36.30)    3.10                60
 03/21/2021   03:14:03   (  69.42, 131.18) 03/21/2021   03:13:47  (  69.40, 131.20)    2.11                16
 03/21/2021   04:04:35   ( -68.79, -60.63) 03/21/2021   04:03:25  ( -68.84, -61.88)   50.91                70
 03/23/2021   18:39:39   ( -69.52,  79.65) 03/23/2021   18:40:45  ( -69.55,  79.64)    3.38                66
 03/23/2021   19:30:22   (  69.41,-112.87) 03/23/2021   19:30:13  (  69.39,-112.94)    3.51                 9
 03/23/2021   20:20:59   ( -69.05,  54.96) 03/23/2021   20:19:47  ( -69.06,  54.27)   27.34                72
 03/26/2021   10:56:00   ( -69.57,-164.48) 03/26/2021   10:57:12  ( -69.54,-164.49)    3.03                72
 03/26/2021   11:46:42   (  69.41,   3.07) 03/26/2021   11:46:39  (  69.43,   3.00)    3.51                 3
 03/26/2021   12:37:23   ( -69.25, 170.60) 03/26/2021   12:36:10  ( -69.27, 170.42)    7.37                73
 03/29/2021   03:12:24   ( -69.77, -48.85) 03/29/2021   03:13:36  ( -69.69, -48.41)   19.34                72
 03/29/2021   04:03:03   (  69.46, 118.93) 03/29/2021   04:03:05  (  69.46, 118.93)    0.61                 2
 03/29/2021   04:53:45   ( -69.35, -73.61) 03/29/2021   04:52:35  ( -69.36, -73.58)    1.38                70
 03/31/2021   19:28:48   ( -69.98,  66.77) 03/31/2021   19:29:59  ( -69.88,  67.74)   38.42                71
 03/31/2021   20:19:24   (  69.51,-125.21) 03/31/2021   20:19:31  (  69.49,-125.15)    2.97                 7
 03/31/2021   21:10:05   ( -69.35,  42.33) 03/31/2021   21:09:02  ( -69.33,  42.27)    2.75                63