Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 2 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)
 02/15/2021   02:18:46   (  71.81, 141.08) 02/15/2021   02:19:51  (  71.74, 143.89)   98.18                65
 02/15/2021   03:09:11   ( -70.87, -49.95) 02/15/2021   03:09:35  ( -70.86, -49.90)    2.46                24
 02/15/2021   03:59:55   (  70.77, 117.53) 02/15/2021   03:59:02  (  70.77, 117.60)    2.77                53
 02/17/2021   19:25:32   ( -70.89,  65.95) 02/17/2021   19:26:03  ( -70.87,  66.00)    2.84                31
 02/17/2021   20:16:15   (  70.75,-126.49) 02/17/2021   20:15:30  (  70.78,-126.50)    3.40                45
 02/20/2021   11:41:52   ( -70.86,-178.06) 02/20/2021   11:42:31  ( -70.88,-178.10)    2.91                39
 02/20/2021   12:32:36   (  70.77, -10.61) 02/20/2021   12:31:58  (  70.78, -10.61)    1.15                38
 02/23/2021   03:58:13   ( -70.88, -62.17) 02/23/2021   03:58:59  ( -70.89, -62.21)    1.81                46
 02/23/2021   04:48:57   (  70.80, 105.28) 02/23/2021   04:48:26  (  70.79, 105.27)    1.79                31
 02/25/2021   20:14:33   ( -70.90,  53.72) 02/25/2021   20:15:26  ( -70.89,  53.67)    2.73                53
 02/25/2021   21:05:17   (  70.83,-138.84) 02/25/2021   21:04:52  (  70.84,-138.77)    2.70                25