Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 12 26.  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   23:24:41   (  69.81,-172.47) 12/27/2020   23:25:50  (  69.69,-171.20)   50.31                69
 12/28/2020   00:15:12   ( -69.16,  -4.21) 12/28/2020   00:15:27  ( -69.19,  -4.24)    3.25                15
 12/28/2020   01:05:56   (  69.06, 163.24) 12/28/2020   01:04:54  (  69.08, 163.27)    3.01                62
 12/30/2020   15:41:06   (  70.01, -56.85) 12/30/2020   15:42:14  (  69.93, -54.99)   71.38                68
 12/30/2020   16:31:33   ( -69.21, 111.65) 12/30/2020   16:31:54  ( -69.22, 111.67)    1.38                21
 12/30/2020   17:22:16   (  69.05, -80.83) 12/30/2020   17:21:22  (  69.05, -80.89)    2.56                54
 01/02/2021   07:57:31   (  70.27,  58.67) 01/02/2021   07:58:37  (  70.17,  61.22)   96.58                66
 01/02/2021   08:47:54   ( -69.20,-132.42) 01/02/2021   08:48:22  ( -69.24,-132.42)    3.40                28
 01/02/2021   09:38:38   (  69.10,  35.03) 01/02/2021   09:37:49  (  69.12,  35.08)    3.05                49
 01/05/2021   01:04:16   ( -69.26, -16.57) 01/05/2021   01:04:50  ( -69.25, -16.52)    1.95                34
 01/05/2021   01:54:59   (  69.10, 150.96) 01/05/2021   01:54:18  (  69.08, 150.90)    3.35                41
 01/07/2021   17:20:37   ( -69.26,  99.36) 01/07/2021   17:21:18  ( -69.26,  99.37)    0.37                41
 01/07/2021   18:11:21   (  69.15, -93.19) 01/07/2021   18:10:45  (  69.14, -93.14)    2.53                36