Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 11 27.  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   23:07:33   ( -71.54,  11.41) 11/28/2021   23:08:38  ( -71.53,  11.46)    2.35                65
 11/28/2021   23:58:18   (  71.42, 178.93) 11/28/2021   23:58:05  (  71.43, 178.94)    1.16                13
 11/29/2021   00:48:52   ( -70.89, -12.84) 11/29/2021   00:47:42  ( -70.94, -14.21)   50.32                70
 12/01/2021   14:34:49   (  71.50, -40.33) 12/01/2021   14:35:40  (  71.50, -40.35)    1.26                51
 12/01/2021   15:25:32   ( -71.43, 127.12) 12/01/2021   15:25:09  ( -71.44, 127.19)    2.61                23
 12/04/2021   06:02:04   ( -71.50, -92.11) 12/04/2021   06:02:44  ( -71.50, -92.11)    0.80                40
 12/04/2021   06:52:49   (  71.39,  75.39) 12/04/2021   06:52:11  (  71.40,  75.36)    1.56                38
 12/06/2021   21:29:22   (  71.50,-143.93) 12/06/2021   21:29:44  (  71.51,-143.86)    2.61                22
 12/06/2021   22:20:05   ( -71.41,  23.54) 12/06/2021   22:19:14  ( -71.40,  23.60)    2.50                51
 12/09/2021   12:06:04   (  71.97,  -3.92) 12/09/2021   12:07:14  (  71.83,  -2.72)   44.55                70
 12/09/2021   12:56:39   ( -71.46, 164.34) 12/09/2021   12:56:49  ( -71.45, 164.29)    1.97                10
 12/09/2021   13:47:24   (  71.37, -28.19) 12/09/2021   13:46:16  (  71.34, -28.25)    3.36                68