Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 8 22.  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)
 08/23/2019   16:07:44   ( -70.45, 114.91) 08/23/2019   16:08:32  ( -70.43, 114.84)    3.51                48
 08/23/2019   16:58:28   (  70.34, -77.61) 08/23/2019   16:57:59  (  70.33, -77.66)    2.51                29
 08/26/2019   08:24:10   ( -70.47,-129.24) 08/26/2019   08:25:00  ( -70.47,-129.21)    0.87                50
 08/26/2019   09:14:54   (  70.36,  38.25) 08/26/2019   09:14:27  (  70.36,  38.27)    1.06                27
 08/26/2019   10:05:18   ( -69.36,-152.93) 08/26/2019   10:04:12  ( -69.43,-155.39)   96.78                66
 08/29/2019   00:40:36   ( -70.44, -13.30) 08/29/2019   00:41:30  ( -70.45, -13.36)    2.42                54
 08/29/2019   01:31:20   (  70.33, 154.18) 08/29/2019   01:30:57  (  70.34, 154.13)    2.54                23
 08/29/2019   02:21:47   ( -69.49, -37.23) 08/29/2019   02:20:40  ( -69.53, -39.39)   84.26                67
 08/31/2019   16:57:03   ( -70.47, 102.55) 08/31/2019   16:57:59  ( -70.49, 102.57)    2.46                56
 08/31/2019   17:47:47   (  70.36, -89.97) 08/31/2019   17:47:26  (  70.37, -89.95)    2.29                21
 08/31/2019   18:38:16   ( -69.62,  78.47) 08/31/2019   18:37:07  ( -69.67,  76.69)   69.25                69
 09/03/2019   09:13:30   ( -70.49,-141.61) 09/03/2019   09:14:29  ( -70.46,-141.58)    3.27                59
 09/03/2019   10:04:13   (  70.33,  25.96) 09/03/2019   10:03:56  (  70.35,  25.89)    3.32                17