Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 11 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)
 11/28/2021   23:07:32   ( -71.50,  11.48) 11/28/2021   23:08:38  ( -71.52,  11.44)    2.16                66
 11/28/2021   23:58:18   (  71.43, 178.91) 11/28/2021   23:58:05  (  71.42, 178.92)    1.62                13
 11/29/2021   00:48:52   ( -70.90, -12.85) 11/29/2021   00:47:42  ( -70.93, -14.23)   50.14                70
 12/01/2021   14:34:49   (  71.52, -40.35) 12/01/2021   14:35:39  (  71.54, -40.28)    3.40                50
 12/01/2021   15:25:32   ( -71.44, 127.10) 12/01/2021   15:25:09  ( -71.43, 127.17)    2.78                23
 12/04/2021   06:02:04   ( -71.51, -92.13) 12/04/2021   06:02:44  ( -71.49, -92.13)    2.05                40
 12/04/2021   06:52:49   (  71.40,  75.37) 12/04/2021   06:52:11  (  71.39,  75.34)    1.83                38
 12/06/2021   21:29:22   (  71.46,-143.86) 12/06/2021   21:29:45  (  71.49,-143.88)    3.34                23
 12/06/2021   22:20:05   ( -71.37,  23.62) 12/06/2021   22:19:15  ( -71.39,  23.58)    1.97                50
 12/09/2021   12:06:03   (  71.93,  -3.84) 12/09/2021   12:07:13  (  71.86,  -2.65)   41.79                70
 12/09/2021   12:56:39   ( -71.47, 164.32) 12/09/2021   12:56:48  ( -71.49, 164.35)    2.25                 9
 12/09/2021   13:47:24   (  71.38, -28.21) 12/09/2021   13:46:15  (  71.38, -28.18)    0.93                69