Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 2 16.  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)
 02/17/2021   19:25:32   ( -70.88,  65.97) 02/17/2021   19:26:03  ( -70.89,  66.03)    2.21                31
 02/17/2021   20:16:16   (  70.78,-126.56) 02/17/2021   20:15:30  (  70.80,-126.47)    3.25                46
 02/20/2021   11:41:52   ( -70.90,-178.13) 02/20/2021   11:42:30  ( -70.90,-178.08)    2.00                38
 02/20/2021   12:32:35   (  70.76, -10.58) 02/20/2021   12:31:58  (  70.75, -10.67)    3.29                37
 02/23/2021   03:58:13   ( -70.92, -62.24) 02/23/2021   03:58:58  ( -70.91, -62.19)    2.60                45
 02/23/2021   04:48:56   (  70.79, 105.30) 02/23/2021   04:48:25  (  70.80, 105.30)    1.95                31
 02/25/2021   20:14:33   ( -70.89,  53.74) 02/25/2021   20:15:26  ( -70.91,  53.69)    2.29                53
 02/25/2021   21:05:17   (  70.82,-138.82) 02/25/2021   21:04:53  (  70.80,-138.82)    1.60                24
 02/25/2021   21:55:43   ( -69.90,  29.95) 02/25/2021   21:54:36  ( -69.98,  27.61)   89.96                67
 02/28/2021   12:30:54   ( -70.92, 169.63) 02/28/2021   12:31:54  ( -70.90, 169.57)    2.79                60
 02/28/2021   13:21:38   (  70.85, -22.94) 02/28/2021   13:21:20  (  70.85, -22.87)    2.61                18