Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 9 27.  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)
 09/27/2019   11:41:37   ( -71.14,-179.67) 09/27/2019   11:42:45  ( -71.06,-177.79)   68.46                68
 09/27/2019   12:32:09   (  70.40, -11.15) 09/27/2019   12:32:22  (  70.41, -11.13)    1.69                13
 09/27/2019   13:22:50   ( -70.29, 156.34) 09/27/2019   13:21:52  ( -70.30, 156.35)    0.91                58
 09/30/2019   03:58:06   ( -71.27, -64.02) 09/30/2019   03:59:13  ( -71.16, -61.75)   82.43                67
 09/30/2019   04:48:35   (  70.39, 104.76) 09/30/2019   04:48:52  (  70.40, 104.74)    1.74                17
 09/30/2019   05:39:16   ( -70.28, -87.75) 09/30/2019   05:38:22  ( -70.29, -87.79)    2.22                54
 10/02/2019   20:14:34   ( -71.36,  51.71) 10/02/2019   20:15:40  ( -71.31,  54.37)   94.87                66
 10/02/2019   21:05:01   (  70.38,-139.34) 10/02/2019   21:05:22  (  70.39,-139.41)    2.72                21
 10/02/2019   21:55:43   ( -70.31,  28.08) 10/02/2019   21:54:51  ( -70.33,  28.15)    3.60                52
 10/05/2019   13:21:27   (  70.42, -23.52) 10/05/2019   13:21:50  (  70.42, -23.47)    1.90                23
 10/05/2019   14:12:08   ( -70.30, 143.99) 10/05/2019   14:11:20  ( -70.32, 144.01)    2.29                48
 10/08/2019   05:37:53   (  70.42,  92.38) 10/08/2019   05:38:20  (  70.40,  92.38)    1.35                27
 10/08/2019   06:28:34   ( -70.29,-100.10) 10/08/2019   06:27:50  ( -70.30,-100.14)    1.82                44
 10/10/2019   21:54:19   (  70.41,-151.73) 10/10/2019   21:54:49  (  70.44,-151.69)    3.06                30
 10/10/2019   22:45:01   ( -70.33,  15.72) 10/10/2019   22:44:19  ( -70.34,  15.79)    2.90                42