Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 6 21.  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)
 06/23/2020   08:04:48   ( -68.91,-121.95) 06/23/2020   08:05:38  ( -68.92,-121.96)    1.70                50
 06/23/2020   08:55:32   (  68.81,  45.49) 06/23/2020   08:55:05  (  68.81,  45.55)    2.11                27
 06/23/2020   09:45:57   ( -67.83,-145.92) 06/23/2020   09:44:49  ( -67.92,-147.89)   83.18                68
 06/26/2020   00:21:12   ( -68.93,  -6.07) 06/26/2020   00:22:07  ( -68.93,  -6.07)    0.51                55
 06/26/2020   01:11:55   (  68.79, 161.43) 06/26/2020   01:11:34  (  68.82, 161.43)    2.86                21
 06/26/2020   02:02:24   ( -68.02, -30.25) 06/26/2020   02:01:15  ( -68.10, -31.80)   65.30                69
 06/28/2020   16:37:35   ( -68.96, 109.80) 06/28/2020   16:38:35  ( -68.94, 109.82)    2.90                60
 06/28/2020   17:28:18   (  68.83, -82.71) 06/28/2020   17:28:02  (  68.82, -82.68)    1.26                16
 06/28/2020   18:18:51   ( -68.26,  85.35) 06/28/2020   18:17:40  ( -68.28,  84.29)   44.03                71
 07/01/2020   08:53:58   ( -68.94,-134.26) 07/01/2020   08:55:04  ( -68.94,-134.29)    1.34                66
 07/01/2020   09:44:41   (  68.81,  33.23) 07/01/2020   09:44:31  (  68.82,  33.21)    1.96                10
 07/01/2020   10:35:18   ( -68.45,-158.98) 07/01/2020   10:34:05  ( -68.51,-159.56)   24.15                73
 07/04/2020   01:10:22   ( -68.97, -18.39) 07/04/2020   01:11:33  ( -68.95, -18.40)    2.14                71
 07/04/2020   02:01:05   (  68.84, 149.09) 07/04/2020   02:01:00  (  68.83, 149.09)    2.08                 5
 07/04/2020   02:51:44   ( -68.59, -43.25) 07/04/2020   02:50:32  ( -68.62, -43.53)   11.94                72