Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 9 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)
 09/17/2020   22:48:58   ( -71.26,  13.84) 09/17/2020   22:50:07  ( -71.15,  15.49)   60.55                69
 09/17/2020   23:39:31   (  70.57,-177.70) 09/17/2020   23:39:43  (  70.55,-177.77)    3.31                12
 09/18/2020   00:30:12   ( -70.47, -10.22) 09/18/2020   00:29:12  ( -70.50, -10.22)    2.84                60
 09/20/2020   15:05:25   ( -71.53, 129.27) 09/20/2020   15:06:31  ( -71.41, 131.81)   90.68                66
 09/20/2020   15:55:53   (  70.59, -61.81) 09/20/2020   15:56:11  (  70.60, -61.82)    1.66                18
 09/20/2020   16:46:34   ( -70.49, 105.66) 09/20/2020   16:45:41  ( -70.50, 105.65)    0.79                53
 09/23/2020   08:12:16   (  70.61,  54.07) 09/23/2020   08:12:41  (  70.60,  54.05)    1.72                25
 09/23/2020   09:02:57   ( -70.51,-138.45) 09/23/2020   09:02:11  ( -70.49,-138.47)    2.12                46
 09/26/2020   00:28:39   (  70.63, 169.94) 09/26/2020   00:29:10  (  70.64, 169.99)    2.03                31
 09/26/2020   01:19:20   ( -70.53, -22.57) 09/26/2020   01:18:40  ( -70.54, -22.53)    1.89                40
 09/28/2020   16:45:01   (  70.61, -74.10) 09/28/2020   16:45:40  (  70.63, -74.14)    3.12                39
 09/28/2020   17:35:43   ( -70.55,  93.31) 09/28/2020   17:35:10  ( -70.53,  93.34)    2.62                33