Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2022 4 7.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 04/07/2022   08:04:21   ( -72.53,-123.69) 04/07/2022   08:05:28  ( -72.45,-121.46)   75.12                67
 04/07/2022   08:54:54   (  71.81,  45.03) 04/07/2022   08:55:05  (  71.82,  45.07)    2.02                11
 04/07/2022   09:45:36   ( -71.69,-147.44) 04/07/2022   09:44:35  ( -71.71,-147.49)    2.08                61
 04/09/2022   23:31:24   (  72.29,-174.97) 04/09/2022   23:32:34  (  72.21,-173.67)   45.16                70
 04/10/2022   00:21:59   ( -71.81,  -6.73) 04/10/2022   00:22:09  ( -71.82,  -6.70)    1.87                10
 04/10/2022   01:12:44   (  71.70, 160.77) 04/10/2022   01:11:36  (  71.73, 160.78)    2.49                68
 04/12/2022   14:58:29   ( -72.24, 133.38) 04/12/2022   14:59:40  ( -72.12, 134.41)   37.31                71
 04/12/2022   15:49:07   (  71.78, -58.44) 04/12/2022   15:49:11  (  71.80, -58.50)    2.89                 4
 04/12/2022   16:39:50   ( -71.71, 109.02) 04/12/2022   16:38:41  ( -71.69, 108.95)    2.75                69
 04/15/2022   06:25:33   (  72.03,  82.04) 04/15/2022   06:26:44  (  71.95,  82.35)   13.61                71
 04/15/2022   07:16:14   ( -71.84,-110.29) 04/15/2022   07:16:14  ( -71.84,-110.21)    3.02                 0
 04/15/2022   08:06:56   (  71.59,  57.47) 04/15/2022   08:05:43  (  71.63,  57.08)   14.18                73
 04/17/2022   21:52:37   ( -71.92,  30.48) 04/17/2022   21:53:48  ( -71.89,  30.49)    2.97                71
 04/17/2022   22:43:21   (  71.79,-161.96) 04/17/2022   22:43:15  (  71.79,-162.05)    3.21                 6
 04/17/2022   23:34:00   ( -71.49,   5.90) 04/17/2022   23:32:48  ( -71.52,   5.13)   27.32                72
 04/20/2022   13:19:43   (  71.89, -21.21) 04/20/2022   13:20:46  (  71.91, -21.25)    2.45                63
 04/20/2022   14:10:26   ( -71.79, 146.29) 04/20/2022   14:10:16  ( -71.80, 146.21)    3.33                10