Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 8 15.  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)
 08/16/2020   18:41:35   (  70.77,-103.63) 08/16/2020   18:42:46  (  70.74,-103.30)   12.48                71
 08/16/2020   19:32:14   ( -70.54,  64.07) 08/16/2020   19:32:18  ( -70.53,  64.01)    2.57                 4
 08/16/2020   20:22:58   (  70.45,-128.48) 08/16/2020   20:21:45  (  70.42,-128.50)    3.49                73
 08/19/2020   10:58:02   (  71.04,  11.84) 08/19/2020   10:59:12  (  70.95,  12.90)   39.57                70
 08/19/2020   11:48:37   ( -70.60, 179.89) 08/19/2020   11:48:47  ( -70.58, 179.96)    3.43                10
 08/19/2020   12:39:20   (  70.46, -12.58) 08/19/2020   12:38:14  (  70.47, -12.56)    1.33                66
 08/22/2020   03:14:30   (  71.30, 127.29) 08/22/2020   03:15:38  (  71.23, 129.22)   69.33                68
 08/22/2020   04:05:00   ( -70.60, -64.21) 08/22/2020   04:05:18  ( -70.59, -64.15)    2.85                18
 08/22/2020   04:55:43   (  70.46, 103.33) 08/22/2020   04:54:45  (  70.48, 103.33)    1.42                58
 08/24/2020   20:21:22   ( -70.56,  51.77) 08/24/2020   20:21:50  ( -70.57,  51.69)    3.07                28
 08/24/2020   21:12:06   (  70.47,-140.77) 08/24/2020   21:11:17  (  70.45,-140.83)    3.30                49
 08/27/2020   12:37:46   ( -70.62, 167.59) 08/27/2020   12:38:21  ( -70.61, 167.64)    2.25                35
 08/27/2020   13:28:29   (  70.48, -24.88) 08/27/2020   13:27:48  (  70.50, -24.89)    1.65                41