Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 2 17.  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,  65.98) 02/17/2021   19:26:03  ( -70.89,  66.03)    2.38                31
 02/17/2021   20:16:16   (  70.78,-126.55) 02/17/2021   20:15:30  (  70.80,-126.47)    3.56                46
 02/20/2021   11:41:52   ( -70.90,-178.13) 02/20/2021   11:42:30  ( -70.90,-178.07)    1.92                38
 02/20/2021   12:32:36   (  70.81, -10.66) 02/20/2021   12:31:57  (  70.81, -10.58)    3.02                39
 02/23/2021   03:58:13   ( -70.92, -62.23) 02/23/2021   03:58:58  ( -70.91, -62.19)    1.86                45
 02/23/2021   04:48:56   (  70.78, 105.31) 02/23/2021   04:48:25  (  70.81, 105.31)    3.17                31
 02/25/2021   20:14:34   ( -70.94,  53.67) 02/25/2021   20:15:26  ( -70.91,  53.70)    3.24                52
 02/25/2021   21:05:17   (  70.81,-138.80) 02/25/2021   21:04:53  (  70.81,-138.82)    0.54                24
 02/25/2021   21:55:43   ( -69.89,  29.97) 02/25/2021   21:54:37  ( -69.93,  27.54)   92.99                66
 02/28/2021   12:30:54   ( -70.91, 169.65) 02/28/2021   12:31:54  ( -70.91, 169.57)    2.76                60
 02/28/2021   13:21:38   (  70.83, -22.92) 02/28/2021   13:21:20  (  70.86, -22.86)    3.06                18
 02/28/2021   14:12:09   ( -70.18, 145.46) 02/28/2021   14:11:00  ( -70.20, 143.80)   62.69                69