Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 8 26.  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)
 08/26/2019   08:24:10   ( -70.44,-129.19) 08/26/2019   08:25:01  ( -70.45,-129.25)    2.40                51
 08/26/2019   09:14:54   (  70.33,  38.30) 08/26/2019   09:14:28  (  70.34,  38.24)    2.79                26
 08/26/2019   10:05:19   ( -69.38,-152.96) 08/26/2019   10:04:13  ( -69.41,-155.43)   96.55                66
 08/29/2019   00:40:36   ( -70.46, -13.34) 08/29/2019   00:41:29  ( -70.49, -13.31)    2.48                53
 08/29/2019   01:31:20   (  70.35, 154.15) 08/29/2019   01:30:56  (  70.38, 154.18)    3.39                24
 08/29/2019   02:21:47   ( -69.51, -37.26) 08/29/2019   02:20:39  ( -69.56, -39.35)   81.39                68
 08/31/2019   16:57:03   ( -70.49, 102.52) 08/31/2019   16:57:59  ( -70.47, 102.54)    2.37                56
 08/31/2019   17:47:47   (  70.37, -90.00) 08/31/2019   17:47:26  (  70.36, -89.98)    1.83                21
 08/31/2019   18:38:15   ( -69.58,  78.52) 08/31/2019   18:37:07  ( -69.65,  76.66)   72.42                68
 09/03/2019   09:13:29   ( -70.46,-141.55) 09/03/2019   09:14:29  ( -70.45,-141.61)    2.51                60
 09/03/2019   10:04:13   (  70.35,  25.94) 09/03/2019   10:03:56  (  70.33,  25.87)    2.75                17
 09/03/2019   10:54:44   ( -69.71,-165.78) 09/03/2019   10:53:34  ( -69.80,-167.26)   57.60                70
 09/06/2019   01:29:56   ( -70.48, -25.71) 09/06/2019   01:30:58  ( -70.48, -25.68)    1.07                62
 09/06/2019   02:20:40   (  70.37, 141.78) 09/06/2019   02:20:25  (  70.36, 141.79)    1.09                15
 09/06/2019   03:11:13   ( -69.85, -50.09) 09/06/2019   03:10:02  ( -69.88, -51.26)   45.01                71
 09/08/2019   17:46:21   ( -70.46,  90.22) 09/08/2019   17:47:27  ( -70.45,  90.16)    2.51                66
 09/08/2019   18:37:05   (  70.35,-102.29) 09/08/2019   18:36:54  (  70.33,-102.37)    3.18                11
 09/08/2019   19:27:40   ( -69.92,  65.68) 09/08/2019   19:26:29  ( -69.96,  64.73)   36.20                71