Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 12 12.  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   05:19:13   ( -70.42, -82.98) 12/14/2019   05:19:44  ( -70.39, -83.02)    3.02                31
 12/14/2019   06:09:56   (  70.28,  84.55) 12/14/2019   06:09:11  (  70.29,  84.47)    3.36                45
 12/16/2019   21:35:39   ( -70.46,  32.86) 12/16/2019   21:36:12  ( -70.44,  32.92)    3.29                33
 12/16/2019   22:26:22   (  70.31,-159.60) 12/16/2019   22:25:39  (  70.33,-159.59)    1.66                43
 12/19/2019   13:52:04   ( -70.44, 148.78) 12/19/2019   13:52:41  ( -70.42, 148.78)    2.62                37
 12/19/2019   14:42:47   (  70.30, -43.68) 12/19/2019   14:42:08  (  70.31, -43.74)    2.38                39
 12/22/2019   06:08:29   ( -70.43, -95.31) 12/22/2019   06:09:09  ( -70.45, -95.29)    2.54                40
 12/22/2019   06:59:13   (  70.34,  72.15) 12/22/2019   06:58:36  (  70.34,  72.18)    1.24                37
 12/24/2019   22:24:53   ( -70.42,  20.61) 12/24/2019   22:25:37  ( -70.43,  20.55)    2.19                44
 12/24/2019   23:15:37   (  70.32,-171.93) 12/24/2019   23:15:04  (  70.31,-171.97)    2.21                33