Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 6 15.  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)
 06/15/2020   07:15:39   ( -68.92,-109.69) 06/15/2020   07:16:12  ( -68.89,-109.64)    3.32                33
 06/15/2020   08:06:22   (  68.75,  57.84) 06/15/2020   08:05:40  (  68.73,  57.81)    2.46                42
 06/17/2020   23:32:01   ( -68.89,   6.25) 06/17/2020   23:32:40  ( -68.91,   6.26)    2.25                39
 06/18/2020   00:22:45   (  68.79, 173.70) 06/18/2020   00:22:07  (  68.80, 173.77)    3.12                38
 06/20/2020   15:48:25   ( -68.92, 122.13) 06/20/2020   15:49:09  ( -68.92, 122.16)    1.33                44
 06/20/2020   16:39:08   (  68.77, -70.36) 06/20/2020   16:38:37  (  68.75, -70.41)    2.67                31
 06/23/2020   08:04:49   ( -68.95,-122.00) 06/23/2020   08:05:38  ( -68.93,-121.95)    2.93                49
 06/23/2020   08:55:32   (  68.80,  45.50) 06/23/2020   08:55:05  (  68.81,  45.55)    1.91                27
 06/23/2020   09:45:57   ( -67.82,-145.91) 06/23/2020   09:44:50  ( -67.88,-147.95)   85.86                67
 06/26/2020   00:21:12   ( -68.92,  -6.06) 06/26/2020   00:22:07  ( -68.93,  -6.07)    0.81                55
 06/26/2020   01:11:55   (  68.79, 161.43) 06/26/2020   01:11:34  (  68.81, 161.43)    2.42                21
 06/26/2020   02:02:25   ( -68.07, -30.30) 06/26/2020   02:01:15  ( -68.10, -31.80)   62.40                70
 06/28/2020   16:37:35   ( -68.96, 109.80) 06/28/2020   16:38:35  ( -68.93, 109.81)    2.91                60
 06/28/2020   17:28:18   (  68.83, -82.71) 06/28/2020   17:28:02  (  68.81, -82.70)    2.41                16
 06/28/2020   18:18:50   ( -68.21,  85.43) 06/28/2020   18:17:40  ( -68.27,  84.27)   48.13                70