Simultaneous Nadir Overpasses (SNOs) between FY3D and METOP-A
TLE Epoch: 2020 6 10.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(METOP-A) METOP-A Lat/Lon    Distance(km)  Time Diff(sec)
 06/10/2020   02:58:49   (  75.63, 121.20) 06/10/2020   02:58:13  (  75.61, 121.19)    2.37                36
 06/10/2020   03:49:32   ( -75.60, -71.40) 06/10/2020   03:48:54  ( -75.64, -71.39)    3.89                38
 06/10/2020   04:40:18   (  75.63,  95.84) 06/10/2020   04:39:34  (  75.63,  95.93)    2.65                44
 06/10/2020   05:31:01   ( -75.60, -96.76) 06/10/2020   05:30:16  ( -75.62, -96.79)    2.17                45
 06/10/2020   06:21:47   (  75.62,  70.48) 06/10/2020   06:20:56  (  75.61,  70.53)    1.57                51
 06/10/2020   07:12:30   ( -75.60,-122.12) 06/10/2020   07:11:38  ( -75.60,-122.20)    2.04                52
 06/10/2020   08:03:16   (  75.62,  45.12) 06/10/2020   08:02:18  (  75.59,  45.12)    2.83                58
 06/10/2020   08:53:59   ( -75.59,-147.48) 06/10/2020   08:52:59  ( -75.63,-147.45)    3.54                60
 06/10/2020   09:44:45   (  75.62,  19.76) 06/10/2020   09:43:39  (  75.62,  19.87)    3.00                66
 06/10/2020   10:35:28   ( -75.59,-172.84) 06/10/2020   10:34:21  ( -75.61,-172.86)    1.61                67
 06/10/2020   11:26:14   (  75.61,  -5.60) 06/10/2020   11:25:01  (  75.60,  -5.54)    2.27                73
 06/10/2020   12:16:57   ( -75.59, 161.80) 06/10/2020   12:15:43  ( -75.58, 161.74)    1.58                74
 06/10/2020   13:07:37   (  75.38, -30.23) 06/10/2020   13:06:26  (  75.39, -31.51)   35.95                71
 06/10/2020   13:58:20   ( -75.35, 137.16) 06/10/2020   13:57:09  ( -75.33, 135.63)   43.16                71
 06/10/2020   14:49:00   (  75.09, -54.74) 06/10/2020   14:47:54  (  75.08, -57.74)   85.76                66
 06/10/2020   15:39:42   ( -75.02, 112.78) 06/10/2020   15:38:37  ( -75.02, 109.41)   96.80                65