Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 9 29.  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)
 09/30/2019   03:58:06   ( -71.27, -64.01) 09/30/2019   03:59:13  ( -71.16, -61.74)   82.09                67
 09/30/2019   04:48:36   (  70.43, 104.69) 09/30/2019   04:48:52  (  70.41, 104.75)    3.06                16
 09/30/2019   05:39:17   ( -70.32, -87.82) 09/30/2019   05:38:22  ( -70.30, -87.78)    2.95                55
 10/02/2019   20:14:34   ( -71.41,  51.64) 10/02/2019   20:15:40  ( -71.26,  54.30)   96.05                66
 10/02/2019   21:05:01   (  70.42,-139.40) 10/02/2019   21:05:21  (  70.39,-139.39)    2.60                20
 10/02/2019   21:55:42   ( -70.30,  28.09) 10/02/2019   21:54:51  ( -70.29,  28.08)    2.07                51
 10/05/2019   13:21:27   (  70.41, -23.50) 10/05/2019   13:21:50  (  70.43, -23.46)    3.12                23
 10/05/2019   14:12:08   ( -70.29, 144.00) 10/05/2019   14:11:21  ( -70.27, 143.94)    3.14                47
 10/08/2019   05:37:53   (  70.40,  92.40) 10/08/2019   05:38:20  (  70.41,  92.40)    1.18                27
 10/08/2019   06:28:35   ( -70.33,-100.17) 10/08/2019   06:27:50  ( -70.31,-100.12)    2.94                45
 10/10/2019   21:54:19   (  70.40,-151.70) 10/10/2019   21:54:50  (  70.39,-151.76)    2.06                31
 10/10/2019   22:45:01   ( -70.32,  15.74) 10/10/2019   22:44:20  ( -70.29,  15.73)    3.53                41