Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 4 29.  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)
 04/30/2021   07:19:10   (  70.12,  69.16) 04/30/2021   07:20:20  (  70.03,  70.22)   41.55                70
 04/30/2021   08:09:42   ( -69.58,-122.71) 04/30/2021   08:09:55  ( -69.58,-122.76)    2.02                13
 04/30/2021   09:00:26   (  69.49,  44.74) 04/30/2021   08:59:22  (  69.48,  44.75)    1.03                64
 05/02/2021   23:35:33   (  70.35,-175.27) 05/02/2021   23:36:41  (  70.29,-173.53)   65.61                68
 05/03/2021   00:26:02   ( -69.61,  -6.81) 05/03/2021   00:26:21  ( -69.62,  -6.83)    1.87                19
 05/03/2021   01:16:46   (  69.51, 160.64) 05/03/2021   01:15:48  (  69.52, 160.68)    1.46                58
 05/05/2021   15:51:57   (  70.59, -59.71) 05/05/2021   15:53:04  (  70.48, -57.37)   87.77                67
 05/05/2021   16:42:22   ( -69.63, 109.09) 05/05/2021   16:42:47  ( -69.66, 109.10)    2.69                25
 05/05/2021   17:33:06   (  69.54, -83.46) 05/05/2021   17:32:14  (  69.55, -83.40)    2.44                52
 05/08/2021   08:58:42   ( -69.66,-135.01) 05/08/2021   08:59:13  ( -69.68,-134.98)    2.89                31
 05/08/2021   09:49:26   (  69.56,  32.44) 05/08/2021   09:48:40  (  69.57,  32.51)    2.88                46
 05/11/2021   01:15:01   ( -69.69, -19.12) 05/11/2021   01:15:38  ( -69.70, -19.07)    2.42                37
 05/11/2021   02:05:44   (  69.54, 148.41) 05/11/2021   02:05:06  (  69.53, 148.34)    2.87                38
 05/13/2021   17:31:21   ( -69.72,  96.77) 05/13/2021   17:32:04  ( -69.72,  96.83)    2.11                43
 05/13/2021   18:22:04   (  69.57, -95.70) 05/13/2021   18:21:31  (  69.60, -95.69)    3.08                33