Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 5.  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)
 03/07/2021   17:01:38   ( -69.42, 104.20) 03/07/2021   17:02:07  ( -69.42, 104.20)    0.46                29
 03/07/2021   17:52:21   (  69.29, -88.30) 03/07/2021   17:51:34  (  69.31, -88.30)    3.08                47
 03/10/2021   09:17:59   ( -69.45,-139.91) 03/10/2021   09:18:34  ( -69.44,-139.90)    1.03                35
 03/10/2021   10:08:42   (  69.33,  27.58) 03/10/2021   10:08:01  (  69.33,  27.60)    0.95                41
 03/13/2021   01:34:19   ( -69.49, -24.03) 03/13/2021   01:35:00  ( -69.46, -24.00)    3.11                41
 03/13/2021   02:25:02   (  69.37, 143.46) 03/13/2021   02:24:27  (  69.34, 143.49)    2.78                35
 03/15/2021   17:50:39   ( -69.47,  91.93) 03/15/2021   17:51:27  ( -69.47,  91.89)    1.44                48
 03/15/2021   18:41:22   (  69.35,-100.59) 03/15/2021   18:40:54  (  69.35,-100.62)    0.96                28
 03/15/2021   19:31:46   ( -68.30,  68.16) 03/15/2021   19:30:40  ( -68.36,  65.77)   98.47                66
 03/18/2021   10:07:00   ( -69.50,-152.19) 03/18/2021   10:07:53  ( -69.53,-152.15)    3.35                53
 03/18/2021   10:57:43   (  69.39,  15.28) 03/18/2021   10:57:20  (  69.41,  15.34)    2.86                23
 03/18/2021   11:48:11   ( -68.55,-176.23) 03/18/2021   11:47:03  ( -68.59,-178.07)   74.86                68