Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 11 6.  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)
 11/06/2021   16:31:50   ( -70.48, 111.85) 11/06/2021   16:33:02  ( -70.48, 111.77)    2.99                72
 11/06/2021   17:22:34   (  70.40, -80.70) 11/06/2021   17:22:29  (  70.38, -80.73)    2.20                 5
 11/06/2021   18:13:13   ( -70.18,  86.97) 11/06/2021   18:12:00  ( -70.21,  86.66)   12.38                73
 11/09/2021   08:48:13   ( -70.80,-132.72) 11/09/2021   08:49:24  ( -70.71,-132.01)   27.98                71
 11/09/2021   09:38:51   (  70.41,  35.24) 11/09/2021   09:38:55  (  70.39,  35.16)    3.68                 4
 11/09/2021   10:29:33   ( -70.34,-157.33) 11/09/2021   10:28:24  ( -70.33,-157.29)    1.89                69
 11/12/2021   01:04:35   ( -71.12, -17.30) 11/12/2021   01:05:44  ( -70.98, -15.71)   59.60                69
 11/12/2021   01:55:07   (  70.42, 151.17) 11/12/2021   01:55:19  (  70.44, 151.12)    2.68                12
 11/12/2021   02:45:49   ( -70.35, -41.39) 11/12/2021   02:44:49  ( -70.33, -41.41)    2.33                60
 11/14/2021   17:20:57   ( -71.39,  98.18) 11/14/2021   17:22:04  ( -71.30, 100.66)   89.13                67
 11/14/2021   18:11:25   (  70.49, -92.99) 11/14/2021   18:11:44  (  70.48, -92.94)    2.19                19
 11/14/2021   19:02:06   ( -70.36,  74.55) 11/14/2021   19:01:14  ( -70.37,  74.53)    1.68                52
 11/17/2021   10:27:42   (  70.51,  22.93) 11/17/2021   10:28:09  (  70.51,  22.98)    1.88                27
 11/17/2021   11:18:24   ( -70.42,-169.60) 11/17/2021   11:17:39  ( -70.40,-169.54)    3.14                45