Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 10 21.  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)
 10/21/2021   14:03:41   (  71.26, -32.48) 10/21/2021   14:04:47  (  71.19, -30.04)   87.94                66
 10/21/2021   14:54:07   ( -70.38, 136.31) 10/21/2021   14:54:30  ( -70.36, 136.34)    2.27                23
 10/21/2021   15:44:51   (  70.27, -56.21) 10/21/2021   15:43:57  (  70.26, -56.17)    2.43                54
 10/24/2021   07:10:24   ( -70.37,-107.71) 10/24/2021   07:10:55  ( -70.36,-107.78)    2.77                31
 10/24/2021   08:01:08   (  70.27,  59.75) 10/24/2021   08:00:22  (  70.25,  59.71)    2.39                46
 10/26/2021   23:26:41   ( -70.41,   8.17) 10/26/2021   23:27:18  ( -70.40,   8.16)    0.64                37
 10/27/2021   00:17:25   (  70.31, 175.63) 10/27/2021   00:16:45  (  70.29, 175.65)    2.59                40
 10/29/2021   15:42:59   ( -70.45, 124.05) 10/29/2021   15:43:42  ( -70.44, 124.10)    2.39                43
 10/29/2021   16:33:42   (  70.31, -68.42) 10/29/2021   16:33:09  (  70.33, -68.42)    1.42                33
 11/01/2021   07:59:16   ( -70.45,-119.99) 11/01/2021   08:00:06  ( -70.47,-119.97)    2.41                50
 11/01/2021   08:50:00   (  70.37,  47.45) 11/01/2021   08:49:33  (  70.35,  47.51)    2.84                27
 11/01/2021   09:40:24   ( -69.35,-143.69) 11/01/2021   09:39:18  ( -69.42,-146.15)   96.61                66
 11/04/2021   00:15:34   ( -70.50,  -4.12) 11/04/2021   00:16:30  ( -70.49,  -4.05)    2.74                56
 11/04/2021   01:06:16   (  70.37, 163.39) 11/04/2021   01:05:56  (  70.37, 163.42)    1.19                20