Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2022 1 19.  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)
 01/20/2022   18:29:17   ( -71.66,  81.11) 01/20/2022   18:30:19  ( -71.64,  81.16)    3.04                62
 01/20/2022   19:20:01   (  71.56,-111.38) 01/20/2022   19:19:46  (  71.55,-111.35)    1.17                15
 01/20/2022   20:10:34   ( -70.92,  57.05) 01/20/2022   20:09:25  ( -70.94,  55.31)   63.39                69
 01/23/2022   09:56:27   (  71.66,  29.34) 01/23/2022   09:57:19  (  71.65,  29.42)    3.19                52
 01/23/2022   10:47:10   ( -71.54,-163.13) 01/23/2022   10:46:49  ( -71.53,-163.14)    1.32                21
 01/26/2022   01:23:36   ( -71.65, -22.41) 01/26/2022   01:24:22  ( -71.62, -22.39)    3.35                46
 01/26/2022   02:14:20   (  71.55, 145.10) 01/26/2022   02:13:49  (  71.53, 145.10)    2.03                31
 01/28/2022   16:50:44   (  71.61, -74.10) 01/28/2022   16:51:21  (  71.61, -74.17)    2.44                37
 01/28/2022   17:41:28   ( -71.54,  93.34) 01/28/2022   17:40:50  ( -71.55,  93.37)    1.39                38
 01/31/2022   08:17:53   ( -71.60,-125.86) 01/31/2022   08:18:23  ( -71.62,-125.91)    2.31                30
 01/31/2022   09:08:38   (  71.55,  41.56) 01/31/2022   09:07:50  (  71.52,  41.57)    3.37                48