Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 6 14.  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)
 06/16/2020   02:43:18   (  70.70, 135.86) 06/16/2020   02:44:29  (  70.67, 136.07)    8.54                71
 06/16/2020   03:33:58   ( -70.54, -56.54) 06/16/2020   03:34:00  ( -70.50, -56.55)    3.52                 2
 06/16/2020   04:24:40   (  70.33, 111.09) 06/16/2020   04:23:28  (  70.35, 110.87)    8.30                72
 06/18/2020   18:59:45   (  70.95,-108.63) 06/18/2020   19:00:56  (  70.81,-107.84)   32.87                71
 06/18/2020   19:50:20   ( -70.51,  59.40) 06/18/2020   19:50:29  ( -70.54,  59.38)    2.85                 9
 06/18/2020   20:41:04   (  70.42,-133.14) 06/18/2020   20:39:56  (  70.43,-133.13)    1.51                68
 06/21/2020   11:16:13   (  71.20,   6.86) 06/21/2020   11:17:22  (  71.05,   8.42)   58.43                69
 06/21/2020   12:06:44   ( -70.54, 175.26) 06/21/2020   12:06:59  ( -70.57, 175.30)    2.92                15
 06/21/2020   12:57:27   (  70.41, -17.21) 06/21/2020   12:56:27  (  70.41, -17.29)    3.04                60
 06/24/2020   03:32:41   (  71.44, 122.34) 06/24/2020   03:33:47  (  71.35, 124.77)   87.12                66
 06/24/2020   04:23:07   ( -70.52, -68.79) 06/24/2020   04:23:30  ( -70.54, -68.86)    2.92                23
 06/24/2020   05:13:51   (  70.45,  98.64) 06/24/2020   05:12:57  (  70.43,  98.62)    2.04                54
 06/26/2020   20:39:31   ( -70.56,  47.06) 06/26/2020   20:40:00  ( -70.56,  47.05)    0.45                29
 06/26/2020   21:30:14   (  70.44,-145.43) 06/26/2020   21:29:27  (  70.45,-145.47)    2.05                47