Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 4 28.  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)
 04/30/2019   10:39:06   ( -70.66,-163.08) 04/30/2019   10:40:08  ( -70.63,-163.07)    2.72                62
 04/30/2019   11:29:50   (  70.54,   4.41) 04/30/2019   11:29:35  (  70.52,   4.41)    2.00                15
 04/30/2019   12:20:22   ( -69.96, 172.63) 04/30/2019   12:19:12  ( -70.04, 171.34)   49.48                70
 05/03/2019   02:55:33   ( -70.63, -47.16) 05/03/2019   02:56:38  ( -70.62, -47.22)    2.55                65
 05/03/2019   03:46:17   (  70.51, 120.34) 05/03/2019   03:46:05  (  70.50, 120.26)    2.99                12
 05/03/2019   04:36:51   ( -70.04, -71.61) 05/03/2019   04:35:40  ( -70.13, -72.65)   40.80                71
 05/05/2019   19:12:01   ( -70.65,  68.69) 05/05/2019   19:13:08  ( -70.63,  68.67)    2.96                67
 05/05/2019   20:02:45   (  70.54,-123.83) 05/05/2019   20:02:34  (  70.57,-123.78)    3.37                11
 05/05/2019   20:53:21   ( -70.17,  44.07) 05/05/2019   20:52:09  ( -70.20,  43.31)   28.88                72
 05/08/2019   11:28:28   ( -70.68,-175.48) 05/08/2019   11:29:37  ( -70.66,-175.42)    3.21                69
 05/08/2019   12:19:11   (  70.52,  -7.91) 05/08/2019   12:19:04  (  70.54,  -7.95)    3.09                 7
 05/08/2019   13:09:49   ( -70.25, 159.83) 05/08/2019   13:08:36  ( -70.34, 159.39)   19.28                73
 05/11/2019   03:44:56   ( -70.71, -59.65) 05/11/2019   03:46:08  ( -70.66, -59.55)    6.50                72
 05/11/2019   04:35:39   (  70.55, 107.92) 05/11/2019   04:35:35  (  70.54, 107.92)    0.84                 4
 05/11/2019   05:26:19   ( -70.39, -84.50) 05/11/2019   05:25:06  ( -70.40, -84.66)    6.24                73