Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 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)
 06/17/2021   13:54:15   (  69.88, -28.93) 06/17/2021   13:55:06  (  69.88, -28.86)    2.32                51
 06/17/2021   14:44:56   ( -69.77, 138.55) 06/17/2021   14:44:36  ( -69.77, 138.62)    2.90                20
 06/17/2021   15:35:24   (  68.81, -52.77) 06/17/2021   15:34:17  (  68.88, -54.90)   85.74                67
 06/20/2021   06:10:33   (  69.88,  87.01) 06/20/2021   06:11:32  (  69.86,  86.99)    2.61                59
 06/20/2021   07:01:14   ( -69.78,-105.51) 06/20/2021   07:01:02  ( -69.75,-105.52)    2.63                12
 06/20/2021   07:51:47   (  69.09,  62.79) 06/20/2021   07:50:38  (  69.14,  61.31)   59.02                69
 06/22/2021   22:26:52   (  69.89,-157.06) 06/22/2021   22:27:58  (  69.89,-157.08)    0.83                66
 06/22/2021   23:17:33   ( -69.78,  10.43) 06/22/2021   23:17:28  ( -69.79,  10.41)    1.54                 5
 06/23/2021   00:08:11   (  69.36, 178.34) 06/23/2021   00:07:00  (  69.40, 177.52)   32.41                71
 06/25/2021   14:43:12   (  69.95, -41.22) 06/25/2021   14:44:24  (  69.92, -41.17)    3.95                72
 06/25/2021   15:33:53   ( -69.83, 126.28) 06/25/2021   15:33:54  ( -69.82, 126.33)    2.12                 1
 06/25/2021   16:24:35   (  69.64, -66.11) 06/25/2021   16:23:22  (  69.64, -66.27)    5.89                73
 06/28/2021   06:59:36   (  70.22,  74.30) 06/28/2021   07:00:47  (  70.11,  74.98)   28.63                71
 06/28/2021   07:50:12   ( -69.83,-117.78) 06/28/2021   07:50:20  ( -69.84,-117.76)    1.38                 8
 06/28/2021   08:40:55   (  69.70,  49.73) 06/28/2021   08:39:47  (  69.72,  49.72)    2.68                68