Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 12 2.  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)
 12/04/2021   06:01:47   ( -71.52, -92.08) 12/04/2021   06:02:43  ( -71.52, -92.08)    0.42                56
 12/04/2021   06:52:32   (  71.41,  75.43) 12/04/2021   06:52:10  (  71.43,  75.41)    2.43                22
 12/04/2021   07:43:00   ( -70.56,-115.82) 12/04/2021   07:41:53  ( -70.61,-118.24)   89.91                67
 12/06/2021   21:28:59   (  71.52,-143.86) 12/06/2021   21:29:44  (  71.53,-143.82)    1.55                45
 12/06/2021   22:19:41   ( -71.40,  23.68) 12/06/2021   22:19:14  ( -71.42,  23.63)    2.88                27
 12/09/2021   12:56:08   ( -71.51, 164.39) 12/09/2021   12:56:48  ( -71.52, 164.39)    0.77                40
 12/09/2021   13:46:53   (  71.41, -28.13) 12/09/2021   13:46:15  (  71.41, -28.14)    0.30                38
 12/12/2021   04:23:18   (  71.48, 112.66) 12/12/2021   04:23:48  (  71.50, 112.61)    2.52                30
 12/12/2021   05:14:01   ( -71.39, -79.87) 12/12/2021   05:13:18  ( -71.40, -79.93)    2.05                43
 12/14/2021   19:50:28   ( -71.51,  60.83) 12/14/2021   19:50:51  ( -71.53,  60.90)    3.45                23
 12/14/2021   20:41:13   (  71.43,-131.71) 12/14/2021   20:40:18  (  71.42,-131.63)    2.87                55