Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 8 12.  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)
 08/14/2020   02:25:10   (  70.65, 140.65) 08/14/2020   02:26:16  (  70.67, 140.73)    3.61                66
 08/14/2020   03:15:51   ( -70.52, -51.81) 08/14/2020   03:15:47  ( -70.51, -51.89)    2.92                 4
 08/14/2020   04:06:29   (  70.12, 116.12) 08/14/2020   04:05:18  (  70.18, 115.28)   32.35                71
 08/16/2020   18:41:34   (  70.70,-103.52) 08/16/2020   18:42:45  (  70.69,-103.36)    5.89                71
 08/16/2020   19:32:14   ( -70.52,  64.10) 08/16/2020   19:32:16  ( -70.53,  64.03)    2.92                 2
 08/16/2020   20:22:56   (  70.33,-128.29) 08/16/2020   20:21:44  (  70.37,-128.57)   10.91                72
 08/19/2020   10:58:00   (  70.91,  12.05) 08/19/2020   10:59:11  (  70.82,  12.71)   26.48                71
 08/19/2020   11:48:37   ( -70.57, 179.93) 08/19/2020   11:48:44  ( -70.55, 179.94)    2.29                 7
 08/19/2020   12:39:20   (  70.44, -12.55) 08/19/2020   12:38:11  (  70.44, -12.58)    1.12                69
 08/22/2020   03:14:27   (  71.12, 127.60) 08/22/2020   03:15:37  (  71.00, 128.87)   47.88                70
 08/22/2020   04:05:00   ( -70.57, -64.16) 08/22/2020   04:05:13  ( -70.57, -64.15)    0.77                13
 08/22/2020   04:55:43   (  70.44, 103.36) 08/22/2020   04:54:40  (  70.45, 103.33)    2.14                63
 08/24/2020   19:30:54   (  71.33,-116.85) 08/24/2020   19:32:02  (  71.22,-114.88)   71.15                68
 08/24/2020   20:21:23   ( -70.58,  51.74) 08/24/2020   20:21:42  ( -70.58,  51.76)    0.91                19
 08/24/2020   21:12:06   (  70.44,-140.73) 08/24/2020   21:11:09  (  70.46,-140.77)    3.23                57