Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 12 29.  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)
 12/30/2021   15:42:45   (  71.58, -57.25) 12/30/2021   15:43:31  (  71.56, -57.25)    2.54                46
 12/30/2021   16:33:28   ( -71.47, 110.26) 12/30/2021   16:33:00  ( -71.49, 110.28)    2.47                28
 01/02/2022   07:09:53   ( -71.56,-108.98) 01/02/2022   07:10:32  ( -71.57,-108.99)    1.24                39
 01/02/2022   08:00:38   (  71.49,  58.44) 01/02/2022   07:59:59  (  71.47,  58.49)    3.01                39
 01/04/2022   22:37:03   (  71.54,-160.72) 01/04/2022   22:37:32  (  71.53,-160.79)    2.62                29
 01/04/2022   23:27:47   ( -71.47,   6.72) 01/04/2022   23:27:01  ( -71.47,   6.74)    1.05                46
 01/07/2022   13:13:45   (  72.46, -21.56) 01/07/2022   13:14:50  (  72.40, -18.68)   97.03                65
 01/07/2022   14:04:13   ( -71.57, 147.46) 01/07/2022   14:04:33  ( -71.59, 147.53)    3.42                20
 01/07/2022   14:54:57   (  71.46, -45.04) 01/07/2022   14:54:00  (  71.48, -44.99)    3.16                57
 01/10/2022   04:40:49   ( -72.18, -72.78) 01/10/2022   04:41:58  ( -72.06, -71.04)   60.68                69
 01/10/2022   05:31:22   (  71.51,  95.78) 01/10/2022   05:31:33  (  71.53,  95.69)    3.58                11
 01/10/2022   06:22:06   ( -71.44, -96.77) 01/10/2022   06:21:03  ( -71.42, -96.85)    3.51                63
 01/12/2022   20:07:52   (  71.83,-123.88) 01/12/2022   20:09:03  (  71.73,-123.36)   21.16                71