Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 11 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)
 11/07/2020   21:41:16   ( -70.70,  31.84) 11/07/2020   21:42:18  ( -70.71,  31.81)    1.76                62
 11/07/2020   22:32:00   (  70.63,-160.74) 11/07/2020   22:31:45  (  70.62,-160.68)    2.26                15
 11/07/2020   23:22:33   ( -70.07,   7.47) 11/07/2020   23:21:22  ( -70.12,   6.21)   47.84                71
 11/10/2020   13:57:38   ( -70.75, 147.68) 11/10/2020   13:58:45  ( -70.73, 147.73)    2.62                67
 11/10/2020   14:48:21   (  70.63, -44.82) 11/10/2020   14:48:12  (  70.64, -44.77)    1.79                 9
 11/10/2020   15:38:58   ( -70.28, 123.07) 11/10/2020   15:37:46  ( -70.30, 122.36)   26.43                72
 11/13/2020   06:14:01   ( -70.80, -96.49) 11/13/2020   06:15:13  ( -70.75, -96.36)    7.46                72
 11/13/2020   07:04:43   (  70.64,  71.09) 11/13/2020   07:04:40  (  70.65,  71.13)    1.87                 3
 11/13/2020   07:55:24   ( -70.49,-121.35) 11/13/2020   07:54:11  ( -70.48,-121.49)    5.18                73
 11/15/2020   22:30:27   ( -71.01,  19.07) 11/15/2020   22:31:38  ( -70.93,  19.79)   27.82                71
 11/15/2020   23:21:05   (  70.65,-173.00) 11/15/2020   23:21:08  (  70.66,-172.97)    1.64                 3
 11/16/2020   00:11:47   ( -70.54,  -5.52) 11/16/2020   00:10:38  ( -70.55,  -5.50)    0.78                69
 11/18/2020   14:46:53   ( -71.23, 134.63) 11/18/2020   14:48:03  ( -71.10, 135.94)   49.43                70
 11/18/2020   15:37:27   (  70.66, -57.10) 11/18/2020   15:37:36  (  70.66, -57.08)    0.85                 9
 11/18/2020   16:28:09   ( -70.55, 110.39) 11/18/2020   16:27:06  ( -70.56, 110.39)    0.77                63
 11/21/2020   07:03:18   ( -71.44,-109.83) 11/21/2020   07:04:26  ( -71.32,-107.82)   72.74                68
 11/21/2020   07:53:48   (  70.67,  58.80) 11/21/2020   07:54:03  (  70.66,  58.80)    0.68                15
 11/21/2020   08:44:30   ( -70.56,-133.70) 11/21/2020   08:43:33  ( -70.56,-133.72)    0.73                57