Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 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)
 12/29/2021   15:10:22   ( -70.74, 132.23) 12/29/2021   15:11:21  ( -70.74, 132.23)    0.17                59
 12/29/2021   16:01:06   (  70.61, -60.25) 12/29/2021   16:00:48  (  70.63, -60.28)    2.74                18
 12/29/2021   16:51:37   ( -69.87, 108.22) 12/29/2021   16:50:29  ( -69.91, 106.32)   72.82                68
 01/01/2022   06:37:33   (  70.75,  80.43) 01/01/2022   06:38:18  (  70.73,  80.46)    3.08                45
 01/01/2022   07:28:16   ( -70.64,-112.07) 01/01/2022   07:27:48  ( -70.61,-112.08)    2.83                28
 01/03/2022   22:04:41   ( -70.72,  28.71) 01/03/2022   22:05:17  ( -70.70,  28.66)    3.35                36
 01/03/2022   22:55:25   (  70.61,-163.80) 01/03/2022   22:54:44  (  70.59,-163.86)    3.29                41
 01/06/2022   13:31:51   (  70.70, -23.03) 01/06/2022   13:32:13  (  70.72, -23.06)    1.89                22
 01/06/2022   14:22:35   ( -70.63, 144.40) 01/06/2022   14:21:43  ( -70.61, 144.41)    2.41                52
 01/09/2022   04:08:26   (  71.27, 116.92) 01/09/2022   04:09:36  (  71.17, 118.23)   48.40                70
 01/09/2022   04:59:01   ( -70.72, -74.84) 01/09/2022   04:59:12  ( -70.73, -74.80)    1.52                11
 01/09/2022   05:49:45   (  70.62,  92.64) 01/09/2022   05:48:39  (  70.62,  92.67)    0.97                66