Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 8 8.  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)
 08/08/2020   17:52:24   (  70.64, -91.16) 08/08/2020   17:53:18  (  70.63, -91.10)    2.75                54
 08/08/2020   18:43:05   ( -70.51,  76.38) 08/08/2020   18:42:48  ( -70.52,  76.37)    1.50                17
 08/08/2020   19:33:35   (  69.69,-115.06) 08/08/2020   19:32:27  (  69.76,-117.08)   78.28                68
 08/11/2020   10:08:47   (  70.64,  24.76) 08/11/2020   10:09:47  (  70.66,  24.82)    3.08                60
 08/11/2020   10:59:29   ( -70.55,-167.79) 08/11/2020   10:59:17  ( -70.55,-167.71)    2.98                12
 08/11/2020   11:50:02   (  69.90,   0.55) 08/11/2020   11:48:53  (  69.95,  -0.93)   56.68                69
 08/14/2020   02:25:10   (  70.64, 140.68) 08/14/2020   02:26:17  (  70.62, 140.66)    1.41                67
 08/14/2020   03:15:52   ( -70.55, -51.87) 08/14/2020   03:15:47  ( -70.52, -51.87)    3.26                 5
 08/14/2020   04:06:29   (  70.11, 116.14) 08/14/2020   04:05:18  (  70.19, 115.30)   33.40                71
 08/16/2020   18:41:33   (  70.68,-103.49) 08/16/2020   18:42:45  (  70.64,-103.43)    4.79                72
 08/16/2020   19:32:14   ( -70.55,  64.05) 08/16/2020   19:32:15  ( -70.54,  64.05)    0.27                 1
 08/16/2020   20:22:56   (  70.36,-128.35) 08/16/2020   20:21:43  (  70.37,-128.55)    7.81                73
 08/19/2020   10:58:00   (  70.89,  12.09) 08/19/2020   10:59:12  (  70.77,  12.64)   24.14                72
 08/19/2020   11:48:37   ( -70.54, 179.97) 08/19/2020   11:48:44  ( -70.56, 179.96)    2.39                 7
 08/19/2020   12:39:21   (  70.47, -12.59) 08/19/2020   12:38:11  (  70.45, -12.57)    2.37                70
 08/22/2020   03:14:27   (  71.09, 127.65) 08/22/2020   03:15:37  (  71.00, 128.88)   45.51                70