Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 1 25.  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)
 01/27/2021   08:24:04   (  70.82,  51.31) 01/27/2021   08:24:49  (  70.85,  51.31)    2.72                45
 01/27/2021   09:14:45   ( -70.73,-141.21) 01/27/2021   09:14:19  ( -70.73,-141.24)    0.91                26
 01/30/2021   00:40:25   (  70.84, 167.22) 01/30/2021   00:41:18  (  70.84, 167.17)    1.56                53
 01/30/2021   01:31:06   ( -70.74, -25.30) 01/30/2021   01:30:48  ( -70.72, -25.37)    3.07                18
 01/30/2021   02:21:35   (  69.84, 143.43) 01/30/2021   02:20:28  (  69.91, 141.09)   89.69                67
 02/01/2021   16:56:46   (  70.86, -76.89) 02/01/2021   16:57:46  (  70.88, -76.88)    2.45                60
 02/01/2021   17:47:27   ( -70.76,  90.60) 02/01/2021   17:47:16  ( -70.77,  90.58)    1.46                11
 02/01/2021   18:38:01   (  70.12,-101.08) 02/01/2021   18:36:52  (  70.17,-102.66)   60.02                69
 02/04/2021   09:13:07   (  70.88,  39.01) 02/04/2021   09:14:15  (  70.86,  38.97)    2.34                68
 02/04/2021   10:03:48   ( -70.78,-153.50) 02/04/2021   10:03:45  ( -70.75,-153.56)    3.33                 3
 02/04/2021   10:54:27   (  70.41,  14.41) 02/04/2021   10:53:15  (  70.48,  13.68)   28.44                72
 02/07/2021   01:29:29   (  71.01, 154.72) 02/07/2021   01:30:41  (  70.95, 154.98)   11.64                72
 02/07/2021   02:20:08   ( -70.80, -37.60) 02/07/2021   02:20:12  ( -70.79, -37.63)    1.22                 4
 02/07/2021   03:10:52   (  70.70, 129.87) 02/07/2021   03:09:39  (  70.68, 129.85)    1.84                73