Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2022 1 20.  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,  81.13) 01/20/2022   18:30:19  ( -71.65,  81.17)    1.66                62
 01/20/2022   19:20:01   (  71.54,-111.36) 01/20/2022   19:19:46  (  71.56,-111.33)    2.08                15
 01/20/2022   20:10:34   ( -70.91,  57.06) 01/20/2022   20:09:25  ( -70.95,  55.32)   63.56                69
 01/23/2022   09:56:27   (  71.65,  29.36) 01/23/2022   09:57:19  (  71.66,  29.44)    2.82                52
 01/23/2022   10:47:10   ( -71.53,-163.11) 01/23/2022   10:46:49  ( -71.54,-163.13)    1.15                21
 01/26/2022   01:23:35   ( -71.64, -22.39) 01/26/2022   01:24:21  ( -71.63, -22.37)    1.35                46
 01/26/2022   02:14:19   (  71.53, 145.12) 01/26/2022   02:13:48  (  71.54, 145.11)    0.39                31
 01/28/2022   16:50:44   (  71.60, -74.08) 01/28/2022   16:51:21  (  71.62, -74.15)    3.41                37
 01/28/2022   17:41:28   ( -71.53,  93.36) 01/28/2022   17:40:50  ( -71.56,  93.38)    3.29                38
 01/31/2022   08:17:54   ( -71.65,-125.93) 01/31/2022   08:18:23  ( -71.63,-125.89)    2.37                29
 01/31/2022   09:08:38   (  71.53,  41.58) 01/31/2022   09:07:50  (  71.53,  41.58)    0.90                48
 02/02/2022   23:45:03   (  71.60,-177.63) 02/02/2022   23:45:23  (  71.59,-177.71)    3.47                20
 02/03/2022   00:35:47   ( -71.54, -10.19) 02/03/2022   00:34:52  ( -71.53, -10.17)    1.03                55