Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 7.  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   ( -69.45, 104.16) 03/07/2021   17:02:06  ( -69.45, 104.23)    2.88                28
 03/07/2021   17:52:21   (  69.31, -88.33) 03/07/2021   17:51:34  (  69.29, -88.34)    2.59                47
 03/10/2021   09:17:58   ( -69.43,-139.88) 03/10/2021   09:18:34  ( -69.42,-139.94)    2.69                36
 03/10/2021   10:08:41   (  69.30,  27.62) 03/10/2021   10:08:01  (  69.31,  27.56)    2.04                40
 03/13/2021   01:34:19   ( -69.47, -24.00) 03/13/2021   01:35:00  ( -69.49, -23.96)    2.49                41
 03/13/2021   02:25:02   (  69.35, 143.49) 03/13/2021   02:24:28  (  69.32, 143.46)    3.22                34
 03/15/2021   17:50:40   ( -69.51,  91.87) 03/15/2021   17:51:27  ( -69.50,  91.93)    2.72                47
 03/15/2021   18:41:22   (  69.39,-100.65) 03/15/2021   18:40:53  (  69.38,-100.58)    2.97                29
 03/15/2021   19:31:46   ( -68.34,  68.11) 03/15/2021   19:30:39  ( -68.39,  65.80)   94.66                67
 03/18/2021   10:06:59   ( -69.50,-152.18) 03/18/2021   10:07:53  ( -69.50,-152.19)    0.24                54
 03/18/2021   10:57:42   (  69.39,  15.29) 03/18/2021   10:57:20  (  69.38,  15.30)    0.63                22
 03/18/2021   11:48:11   ( -68.60,-176.30) 03/18/2021   11:47:02  ( -68.62,-178.04)   70.78                69