Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 12 27.  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)
 12/27/2020   23:24:40   (  69.76,-172.40) 12/27/2020   23:25:50  (  69.68,-171.22)   46.49                70
 12/28/2020   00:15:12   ( -69.17,  -4.23) 12/28/2020   00:15:27  ( -69.18,  -4.25)    1.27                15
 12/28/2020   01:05:56   (  69.07, 163.22) 12/28/2020   01:04:54  (  69.07, 163.26)    1.58                62
 12/30/2020   15:41:06   (  70.02, -56.86) 12/30/2020   15:42:14  (  69.92, -55.00)   71.54                68
 12/30/2020   16:31:34   ( -69.22, 111.63) 12/30/2020   16:31:55  ( -69.21, 111.66)    1.64                21
 12/30/2020   17:22:17   (  69.06, -80.84) 12/30/2020   17:21:23  (  69.04, -80.90)    3.29                54
 01/02/2021   07:57:31   (  70.27,  58.67) 01/02/2021   07:58:37  (  70.16,  61.21)   96.62                66
 01/02/2021   08:47:54   ( -69.21,-132.43) 01/02/2021   08:48:22  ( -69.23,-132.43)    1.67                28
 01/02/2021   09:38:38   (  69.11,  35.02) 01/02/2021   09:37:49  (  69.12,  35.07)    2.02                49
 01/05/2021   01:04:16   ( -69.26, -16.58) 01/05/2021   01:04:50  ( -69.24, -16.54)    2.71                34
 01/05/2021   01:54:59   (  69.10, 150.95) 01/05/2021   01:54:17  (  69.13, 150.96)    2.66                42
 01/07/2021   17:20:37   ( -69.26,  99.35) 01/07/2021   17:21:18  ( -69.25,  99.36)    1.04                41
 01/07/2021   18:11:21   (  69.16, -93.19) 01/07/2021   18:10:45  (  69.13, -93.15)    2.89                36