Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 1 6.  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)
 01/07/2021   17:20:37   ( -69.25,  99.37) 01/07/2021   17:21:18  ( -69.26,  99.37)    1.34                41
 01/07/2021   18:11:21   (  69.13, -93.16) 01/07/2021   18:10:45  (  69.16, -93.13)    2.98                36
 01/10/2021   09:36:57   ( -69.25,-144.70) 01/10/2021   09:37:45  ( -69.27,-144.75)    2.76                48
 01/10/2021   10:27:41   (  69.13,  22.77) 01/10/2021   10:27:12  (  69.16,  22.75)    3.03                29
 01/10/2021   11:18:05   ( -68.13,-168.57) 01/10/2021   11:16:58  ( -68.16,-170.85)   94.50                67
 01/13/2021   01:53:19   ( -69.30, -28.85) 01/13/2021   01:54:12  ( -69.32, -28.80)    3.03                53
 01/13/2021   02:44:03   (  69.18, 138.62) 01/13/2021   02:43:40  (  69.15, 138.63)    3.42                23
 01/13/2021   03:34:30   ( -68.34, -52.92) 01/13/2021   03:33:22  ( -68.38, -54.70)   73.45                68
 01/15/2021   18:09:40   ( -69.30,  87.08) 01/15/2021   18:10:40  ( -69.31,  87.07)    1.52                60
 01/15/2021   19:00:24   (  69.19,-105.45) 01/15/2021   19:00:07  (  69.20,-105.43)    1.81                17
 01/15/2021   19:50:56   ( -68.61,  62.66) 01/15/2021   19:49:45  ( -68.65,  61.51)   46.84                71
 01/18/2021   10:26:01   ( -69.30,-157.00) 01/18/2021   10:27:08  ( -69.30,-157.06)    2.35                67
 01/18/2021   11:16:45   (  69.19,  10.47) 01/18/2021   11:16:35  (  69.19,  10.43)    1.52                10
 01/18/2021   12:07:20   ( -68.83, 178.30) 01/18/2021   12:06:08  ( -68.86, 177.65)   26.16                72