Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 12 14.  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)
 12/14/2019   05:19:14   ( -70.43, -83.00) 12/14/2019   05:19:44  ( -70.43, -82.96)    1.34                30
 12/14/2019   06:09:58   (  70.34,  84.46) 12/14/2019   06:09:11  (  70.33,  84.53)    3.09                47
 12/16/2019   21:35:38   ( -70.41,  32.93) 12/16/2019   21:36:12  ( -70.42,  32.89)    1.36                34
 12/16/2019   22:26:22   (  70.32,-159.62) 12/16/2019   22:25:39  (  70.31,-159.62)    1.10                43
 12/19/2019   13:52:04   ( -70.44, 148.77) 12/19/2019   13:52:40  ( -70.45, 148.83)    2.25                36
 12/19/2019   14:42:48   (  70.35, -43.77) 12/19/2019   14:42:07  (  70.34, -43.69)    3.19                41
 12/22/2019   06:08:29   ( -70.43, -95.30) 12/22/2019   06:09:09  ( -70.43, -95.32)    0.91                40
 12/22/2019   06:59:13   (  70.33,  72.16) 12/22/2019   06:58:36  (  70.31,  72.15)    1.72                37
 12/24/2019   22:24:55   ( -70.46,  20.54) 12/24/2019   22:25:37  ( -70.46,  20.60)    2.24                42
 12/24/2019   23:15:38   (  70.31,-171.92) 12/24/2019   23:15:04  (  70.34,-171.93)    3.33                34
 12/27/2019   14:41:19   ( -70.44, 136.46) 12/27/2019   14:42:05  ( -70.43, 136.44)    1.89                46
 12/27/2019   15:32:03   (  70.35, -56.07) 12/27/2019   15:31:31  (  70.36, -56.01)    3.06                32