Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 2 28.  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)
 02/28/2021   12:30:54   ( -70.95, 169.58) 02/28/2021   12:31:53  ( -70.94, 169.61)    1.76                59
 02/28/2021   13:21:37   (  70.81, -22.88) 02/28/2021   13:21:20  (  70.84, -22.89)    3.26                17
 02/28/2021   14:12:08   ( -70.17, 145.48) 02/28/2021   14:10:59  ( -70.23, 143.84)   62.41                69
 03/03/2021   04:47:14   ( -70.92, -74.44) 03/03/2021   04:48:21  ( -70.93, -74.52)    2.87                67
 03/03/2021   05:37:58   (  70.85,  92.99) 03/03/2021   05:37:48  (  70.83,  92.97)    2.21                10
 03/03/2021   06:28:34   ( -70.45, -99.04) 03/03/2021   06:27:22  ( -70.49, -99.90)   32.07                72
 03/05/2021   21:03:35   ( -71.00,  41.35) 03/05/2021   21:04:47  ( -70.97,  41.42)    4.89                72
 03/05/2021   21:54:18   (  70.88,-151.13) 03/05/2021   21:54:14  (  70.87,-151.09)    2.48                 4
 03/05/2021   22:44:58   ( -70.69,  16.50) 03/05/2021   22:43:45  ( -70.70,  16.29)    7.95                73
 03/08/2021   13:20:00   ( -71.24, 156.87) 03/08/2021   13:21:12  ( -71.11, 157.53)   27.61                72
 03/08/2021   14:10:38   (  70.87, -35.17) 03/08/2021   14:10:41  (  70.90, -35.16)    3.29                 3
 03/08/2021   15:01:20   ( -70.77, 132.30) 03/08/2021   15:00:11  ( -70.79, 132.30)    1.25                69
 03/11/2021   05:36:25   ( -71.48, -87.62) 03/11/2021   05:37:35  ( -71.35, -86.20)   52.06                70
 03/11/2021   06:26:59   (  70.90,  80.69) 03/11/2021   06:27:08  (  70.92,  80.76)    3.13                 9
 03/11/2021   07:17:41   ( -70.81,-111.82) 03/11/2021   07:16:38  ( -70.82,-111.77)    2.16                63
 03/13/2021   21:52:50   ( -71.72,  27.88) 03/13/2021   21:53:57  ( -71.65,  30.17)   80.26                67
 03/13/2021   22:43:19   (  70.89,-163.35) 03/13/2021   22:43:36  (  70.89,-163.41)    2.10                17
 03/13/2021   23:34:01   ( -70.79,   4.14) 03/13/2021   23:33:06  ( -70.79,   4.06)    2.75                55