Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2022 1 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)
 01/07/2022   14:04:13   ( -71.54, 147.50) 01/07/2022   14:04:39  ( -71.55, 147.45)    2.01                26
 01/07/2022   14:54:58   (  71.48, -45.08) 01/07/2022   14:54:06  (  71.46, -45.05)    2.29                52
 01/10/2022   04:40:54   ( -72.40, -73.21) 01/10/2022   04:42:01  ( -72.29, -70.67)   86.77                67
 01/10/2022   05:31:24   (  71.58,  95.67) 01/10/2022   05:31:40  (  71.55,  95.70)    2.65                16
 01/10/2022   06:22:07   ( -71.45, -96.80) 01/10/2022   06:21:10  ( -71.44, -96.86)    2.80                57
 01/12/2022   20:07:57   (  72.08,-124.37) 01/12/2022   20:09:07  (  71.96,-123.00)   48.60                70
 01/12/2022   20:58:32   ( -71.55,  43.95) 01/12/2022   20:58:43  ( -71.53,  43.89)    3.23                11
 01/12/2022   21:49:16   (  71.44,-148.55) 01/12/2022   21:48:10  (  71.43,-148.63)    3.18                66
 01/15/2022   11:35:02   ( -71.85,-175.68) 01/15/2022   11:36:14  ( -71.77,-175.10)   21.89                72
 01/15/2022   12:25:42   (  71.54,  -7.81) 01/15/2022   12:25:43  (  71.56,  -7.81)    2.67                 1
 01/15/2022   13:16:26   ( -71.46, 159.64) 01/15/2022   13:15:13  ( -71.45, 159.64)    1.26                73
 01/18/2022   03:02:08   (  71.64, 132.93) 01/18/2022   03:03:17  (  71.64, 132.92)    0.45                69
 01/18/2022   03:52:52   ( -71.56, -59.62) 01/18/2022   03:52:46  ( -71.58, -59.54)    3.53                 6
 01/18/2022   04:43:29   (  71.09, 108.51) 01/18/2022   04:42:19  (  71.15, 107.41)   40.45                70
 01/20/2022   18:29:18   ( -71.66,  81.12) 01/20/2022   18:30:20  ( -71.65,  81.18)    2.03                62
 01/20/2022   19:20:02   (  71.56,-111.39) 01/20/2022   19:19:47  (  71.55,-111.35)    1.75                15