Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 12 23.  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)
 12/25/2020   07:08:15   (  69.54,  71.99) 12/25/2020   07:09:26  (  69.44,  72.58)   25.72                71
 12/25/2020   07:58:51   ( -69.16,-120.14) 12/25/2020   07:58:59  ( -69.16,-120.15)    0.36                 8
 12/25/2020   08:49:35   (  69.06,  47.30) 12/25/2020   08:48:26  (  69.06,  47.36)    2.35                69
 12/27/2020   23:24:41   (  69.80,-172.46) 12/27/2020   23:25:50  (  69.69,-171.20)   49.65                69
 12/28/2020   00:15:13   ( -69.20,  -4.27) 12/28/2020   00:15:27  ( -69.19,  -4.23)    1.95                14
 12/28/2020   01:05:56   (  69.05, 163.25) 12/28/2020   01:04:55  (  69.03, 163.20)    3.13                61
 12/30/2020   15:41:05   (  70.00, -56.83) 12/30/2020   15:42:13  (  69.93, -54.99)   70.59                68
 12/30/2020   16:31:33   ( -69.19, 111.67) 12/30/2020   16:31:54  ( -69.22, 111.68)    2.94                21
 12/30/2020   17:22:17   (  69.09, -80.89) 12/30/2020   17:21:21  (  69.11, -80.82)    2.94                56
 01/02/2021   07:57:31   (  70.25,  58.70) 01/02/2021   07:58:37  (  70.17,  61.22)   95.48                66
 01/02/2021   08:47:55   ( -69.24,-132.47) 01/02/2021   08:48:22  ( -69.24,-132.42)    2.12                27
 01/02/2021   09:38:38   (  69.09,  35.05) 01/02/2021   09:37:50  (  69.07,  35.01)    2.65                48
 01/05/2021   01:04:16   ( -69.23, -16.53) 01/05/2021   01:04:50  ( -69.25, -16.52)    2.33                34
 01/05/2021   01:55:00   (  69.13, 150.92) 01/05/2021   01:54:17  (  69.13, 150.97)    2.29                43