Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 1 7.  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)
 01/08/2021   13:38:55   ( -70.89, 152.40) 01/08/2021   13:40:07  ( -70.87, 152.55)    5.54                72
 01/08/2021   14:29:38   (  70.73, -40.02) 01/08/2021   14:29:35  (  70.72, -40.05)    1.30                 3
 01/08/2021   15:20:18   ( -70.57, 127.55) 01/08/2021   15:19:05  ( -70.60, 127.41)    5.78                73
 01/11/2021   05:55:21   ( -71.14, -92.11) 01/11/2021   05:56:32  ( -71.03, -91.33)   30.99                71
 01/11/2021   06:46:00   (  70.78,  75.82) 01/11/2021   06:46:02  (  70.76,  75.90)    3.40                 2
 01/11/2021   07:36:40   ( -70.62,-116.61) 01/11/2021   07:35:32  ( -70.65,-116.63)    2.94                68
 01/13/2021   22:11:46   ( -71.35,  23.46) 01/13/2021   22:12:56  ( -71.23,  24.88)   52.30                70
 01/13/2021   23:02:21   (  70.77,-168.25) 01/13/2021   23:02:30  (  70.75,-168.23)    3.18                 9
 01/13/2021   23:53:02   ( -70.67,  -0.76) 01/13/2021   23:51:59  ( -70.69,  -0.68)    3.41                63
 01/16/2021   14:28:12   ( -71.61, 138.93) 01/16/2021   14:29:19  ( -71.48, 141.17)   80.32                67
 01/16/2021   15:18:42   (  70.77, -52.32) 01/16/2021   15:18:57  (  70.78, -52.30)    1.16                15
 01/16/2021   16:09:23   ( -70.67, 115.17) 01/16/2021   16:08:27  ( -70.67, 115.17)    0.28                56
 01/19/2021   07:35:02   (  70.78,  63.60) 01/19/2021   07:35:24  (  70.76,  63.55)    2.86                22
 01/19/2021   08:25:43   ( -70.67,-128.91) 01/19/2021   08:24:54  ( -70.65,-128.98)    3.50                49