Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 6 25.  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)
 06/25/2021   14:43:13   (  70.00, -41.29) 06/25/2021   14:44:23  (  70.00, -41.06)    8.79                70
 06/25/2021   15:33:53   ( -69.84, 126.28) 06/25/2021   15:33:54  ( -69.83, 126.34)    2.77                 1
 06/25/2021   16:24:35   (  69.63, -66.11) 06/25/2021   16:23:22  (  69.67, -66.24)    6.09                73
 06/28/2021   06:59:35   (  70.23,  74.30) 06/28/2021   07:00:46  (  70.13,  75.01)   28.74                71
 06/28/2021   07:50:11   ( -69.85,-117.79) 06/28/2021   07:50:19  ( -69.85,-117.74)    2.03                 8
 06/28/2021   08:40:54   (  69.70,  49.73) 06/28/2021   08:39:47  (  69.69,  49.68)    2.69                67
 06/30/2021   23:15:59   (  70.51,-170.20) 06/30/2021   23:17:08  (  70.37,-168.77)   55.42                69
 07/01/2021   00:06:30   ( -69.86,  -1.86) 07/01/2021   00:06:45  ( -69.88,  -1.83)    2.56                15
 07/01/2021   00:57:13   (  69.72, 165.65) 07/01/2021   00:56:13  (  69.71, 165.58)    3.00                60
 07/03/2021   15:32:22   (  70.73, -54.62) 07/03/2021   15:33:29  (  70.66, -52.46)   80.04                67
 07/03/2021   16:22:49   ( -69.87, 114.06) 07/03/2021   16:23:11  ( -69.89, 114.07)    3.05                22
 07/03/2021   17:13:33   (  69.79, -78.51) 07/03/2021   17:12:38  (  69.78, -78.44)    2.80                55
 07/06/2021   08:39:08   ( -69.88,-130.01) 07/06/2021   08:39:37  ( -69.90,-130.03)    3.17                29
 07/06/2021   09:29:52   (  69.81,  37.41) 07/06/2021   09:29:04  (  69.79,  37.45)    2.82                48