Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 4 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)
 04/19/2020   23:50:07   ( -69.44,   0.86) 04/19/2020   23:51:17  ( -69.31,   2.06)   49.29                70
 04/20/2020   00:40:41   (  68.80, 169.05) 04/20/2020   00:40:51  (  68.81, 169.07)    1.06                10
 04/20/2020   01:31:22   ( -68.69, -23.47) 04/20/2020   01:30:21  ( -68.70, -23.44)    2.02                61
 04/22/2020   16:06:33   ( -69.54, 116.61) 04/22/2020   16:07:42  ( -69.42, 118.10)   59.62                69
 04/22/2020   16:57:05   (  68.80, -75.04) 04/22/2020   16:57:18  (  68.81, -75.04)    1.28                13
 04/22/2020   17:47:46   ( -68.69,  92.43) 04/22/2020   17:46:48  ( -68.70,  92.46)    2.29                58
 04/25/2020   08:22:59   ( -69.65,-127.63) 04/25/2020   08:24:07  ( -69.53,-125.85)   70.24                68
 04/25/2020   09:13:29   (  68.80,  40.87) 04/25/2020   09:13:45  (  68.81,  40.85)    1.51                16
 04/25/2020   10:04:10   ( -68.69,-151.66) 04/25/2020   10:03:15  ( -68.71,-151.65)    2.41                55
 04/28/2020   00:39:25   ( -69.76, -11.89) 04/28/2020   00:40:32  ( -69.65,  -9.81)   81.01                67
 04/28/2020   01:29:53   (  68.80, 156.77) 04/28/2020   01:30:12  (  68.81, 156.74)    1.67                19
 04/28/2020   02:20:34   ( -68.69, -35.76) 04/28/2020   02:19:42  ( -68.71, -35.75)    2.28                52
 04/30/2020   16:55:50   ( -69.86, 103.86) 04/30/2020   16:56:56  ( -69.76, 106.23)   91.88                66
 04/30/2020   17:46:16   (  68.80, -87.33) 04/30/2020   17:46:38  (  68.81, -87.37)    1.93                22
 04/30/2020   18:36:57   ( -68.69,  80.15) 04/30/2020   18:36:08  ( -68.71,  80.14)    1.88                49