Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 1 23.  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   (  70.79, -64.57) 01/24/2021   16:08:22  (  70.81, -64.63)    2.77                38
 01/24/2021   16:58:24   ( -70.70, 102.91) 01/24/2021   16:57:51  ( -70.69, 102.83)    3.12                33
 01/27/2021   08:24:05   (  70.85,  51.26) 01/27/2021   08:24:49  (  70.86,  51.33)    2.55                44
 01/27/2021   09:14:46   ( -70.76,-141.26) 01/27/2021   09:14:19  ( -70.74,-141.21)    2.61                27
 01/30/2021   00:40:26   (  70.87, 167.17) 01/30/2021   00:41:18  (  70.85, 167.19)    2.04                52
 01/30/2021   01:31:07   ( -70.77, -25.35) 01/30/2021   01:30:48  ( -70.74, -25.34)    3.30                19
 01/30/2021   02:21:35   (  69.81, 143.46) 01/30/2021   02:20:29  (  69.87, 141.03)   93.28                66
 02/01/2021   16:56:47   (  70.88, -76.93) 02/01/2021   16:57:46  (  70.89, -76.86)    2.70                59
 02/01/2021   17:47:28   ( -70.78,  90.57) 02/01/2021   17:47:16  ( -70.78,  90.60)    1.56                12
 02/01/2021   18:38:01   (  70.09,-101.03) 02/01/2021   18:36:52  (  70.19,-102.64)   61.64                69
 02/04/2021   09:13:07   (  70.89,  38.98) 02/04/2021   09:14:14  (  70.88,  38.99)    2.05                67
 02/04/2021   10:03:48   ( -70.79,-153.52) 02/04/2021   10:03:44  ( -70.77,-153.54)    2.09                 4
 02/04/2021   10:54:26   (  70.37,  14.46) 02/04/2021   10:53:15  (  70.44,  13.62)   32.63                71