Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 11 16.  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)
 11/18/2021   10:08:44   (  71.48,  26.11) 11/18/2021   10:09:52  (  71.50,  26.11)    2.09                68
 11/18/2021   10:59:26   ( -71.39,-166.41) 11/18/2021   10:59:22  ( -71.38,-166.45)    1.57                 4
 11/18/2021   11:50:04   (  71.02,   1.55) 11/18/2021   11:48:53  (  71.07,   0.69)   31.59                71
 11/21/2021   02:25:06   (  71.76, 141.55) 11/21/2021   02:26:17  (  71.64, 142.23)   27.44                71
 11/21/2021   03:15:43   ( -71.41, -50.49) 11/21/2021   03:15:49  ( -71.42, -50.50)    1.46                 6
 11/21/2021   04:06:26   (  71.30, 117.01) 11/21/2021   04:05:16  (  71.32, 116.98)    2.07                70
 11/23/2021   18:41:30   (  72.15,-103.24) 11/23/2021   18:42:37  (  72.05,-101.18)   71.16                67
 11/23/2021   19:32:00   ( -71.43,  65.42) 11/23/2021   19:32:16  ( -71.46,  65.44)    2.59                16
 11/23/2021   20:22:43   (  71.33,-127.09) 11/23/2021   20:21:43  (  71.35,-127.09)    1.81                60
 11/26/2021   11:48:17   ( -71.46,-178.67) 11/26/2021   11:48:43  ( -71.48,-178.63)    2.88                26
 11/26/2021   12:39:00   (  71.37, -11.19) 11/26/2021   12:38:10  (  71.37, -11.16)    1.26                50
 11/29/2021   04:04:33   ( -71.49, -62.78) 11/29/2021   04:05:09  ( -71.50, -62.71)    2.68                36
 11/29/2021   04:55:16   (  71.40, 104.70) 11/29/2021   04:54:36  (  71.39, 104.75)    2.24                40