Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 11 19.  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)
 11/21/2020   07:03:22   ( -71.66,-110.23) 11/21/2020   07:04:27  ( -71.58,-107.42)   98.98                65
 11/21/2020   07:53:48   (  70.67,  58.80) 11/21/2020   07:54:09  (  70.67,  58.78)    0.98                21
 11/21/2020   08:44:30   ( -70.57,-133.73) 11/21/2020   08:43:39  ( -70.55,-133.76)    2.62                51
 11/24/2020   00:10:10   (  70.69, 174.70) 11/24/2020   00:10:38  (  70.71, 174.72)    2.71                28
 11/24/2020   01:00:52   ( -70.58, -17.82) 11/24/2020   01:00:08  ( -70.60, -17.81)    1.80                44
 11/26/2020   16:26:32   (  70.70, -69.40) 11/26/2020   16:27:08  (  70.69, -69.43)    1.34                36
 11/26/2020   17:17:14   ( -70.59,  98.09) 11/26/2020   17:16:38  ( -70.59,  98.04)    1.85                36
 11/29/2020   08:42:54   (  70.71,  46.49) 11/29/2020   08:43:37  (  70.72,  46.50)    0.99                43
 11/29/2020   09:33:36   ( -70.61,-146.01) 11/29/2020   09:33:07  ( -70.62,-146.03)    1.51                29
 12/02/2020   00:59:15   (  70.73, 162.39) 12/02/2020   01:00:05  (  70.75, 162.41)    2.32                50
 12/02/2020   01:49:57   ( -70.62, -30.12) 12/02/2020   01:49:35  ( -70.65, -30.10)    3.07                22