Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 2 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)
 02/15/2021   03:59:55   (  70.77, 117.53) 02/15/2021   03:59:02  (  70.77, 117.60)    2.79                53
 02/17/2021   19:25:32   ( -70.90,  65.95) 02/17/2021   19:26:03  ( -70.88,  66.00)    3.11                31
 02/17/2021   20:16:15   (  70.75,-126.49) 02/17/2021   20:15:30  (  70.78,-126.50)    3.55                45
 02/20/2021   11:41:52   ( -70.86,-178.07) 02/20/2021   11:42:31  ( -70.89,-178.10)    2.65                39
 02/20/2021   12:32:36   (  70.77, -10.61) 02/20/2021   12:31:58  (  70.79, -10.61)    1.35                38
 02/23/2021   03:58:13   ( -70.89, -62.18) 02/23/2021   03:58:59  ( -70.89, -62.21)    1.40                46
 02/23/2021   04:48:57   (  70.80, 105.27) 02/23/2021   04:48:26  (  70.79, 105.28)    1.51                31
 02/25/2021   20:14:33   ( -70.91,  53.72) 02/25/2021   20:15:26  ( -70.89,  53.67)    2.24                53
 02/25/2021   21:05:16   (  70.78,-138.76) 02/25/2021   21:04:53  (  70.79,-138.84)    3.19                23
 02/25/2021   21:55:43   ( -69.92,  29.93) 02/25/2021   21:54:36  ( -69.97,  27.59)   89.45                67
 02/28/2021   12:30:54   ( -70.93, 169.60) 02/28/2021   12:31:53  ( -70.95, 169.64)    1.72                59
 02/28/2021   13:21:37   (  70.81, -22.88) 02/28/2021   13:21:20  (  70.84, -22.89)    2.78                17