Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 1 24.  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)
 01/24/2021   16:07:44   (  70.80, -64.58) 01/24/2021   16:08:22  (  70.80, -64.64)    2.11                38
 01/24/2021   16:58:25   ( -70.71, 102.89) 01/24/2021   16:57:51  ( -70.74, 102.90)    3.31                34
 01/27/2021   08:24:05   (  70.86,  51.24) 01/27/2021   08:24:49  (  70.85,  51.32)    3.06                44
 01/27/2021   09:14:45   ( -70.72,-141.19) 01/27/2021   09:14:19  ( -70.74,-141.22)    2.37                26
 01/30/2021   00:40:25   (  70.83, 167.23) 01/30/2021   00:41:18  (  70.84, 167.18)    2.68                53
 01/30/2021   01:31:06   ( -70.73, -25.28) 01/30/2021   01:30:48  ( -70.73, -25.35)    2.57                18
 01/30/2021   02:21:35   (  69.83, 143.44) 01/30/2021   02:20:29  (  69.86, 141.03)   92.75                66
 02/01/2021   16:56:47   (  70.90, -76.95) 02/01/2021   16:57:46  (  70.89, -76.87)    3.10                59
 02/01/2021   17:47:28   ( -70.80,  90.54) 02/01/2021   17:47:16  ( -70.78,  90.59)    2.94                12
 02/01/2021   18:38:01   (  70.11,-101.06) 02/01/2021   18:36:52  (  70.18,-102.65)   60.68                69
 02/04/2021   09:13:07   (  70.86,  39.03) 02/04/2021   09:14:15  (  70.87,  38.98)    2.05                68
 02/04/2021   10:03:48   ( -70.76,-153.47) 02/04/2021   10:03:45  ( -70.76,-153.55)    3.01                 3
 02/04/2021   10:54:27   (  70.39,  14.43) 02/04/2021   10:53:16  (  70.43,  13.60)   31.22                71
 02/07/2021   01:29:30   (  71.04, 154.66) 02/07/2021   01:30:41  (  70.95, 154.99)   15.46                71
 02/07/2021   02:20:08   ( -70.78, -37.57) 02/07/2021   02:20:12  ( -70.79, -37.62)    2.81                 4
 02/07/2021   03:10:52   (  70.68, 129.90) 02/07/2021   03:09:39  (  70.68, 129.86)    1.86                73