Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 9 3.  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)
 09/04/2021   07:09:43   (  71.28,  70.61) 09/04/2021   07:10:38  (  71.28,  70.58)    1.36                55
 09/04/2021   08:00:25   ( -71.21,-121.95) 09/04/2021   08:00:07  ( -71.22,-121.89)    2.31                18
 09/04/2021   08:50:54   (  70.34,  46.81) 09/04/2021   08:49:47  (  70.41,  44.52)   85.88                67
 09/06/2021   23:26:02   (  71.33,-173.53) 09/06/2021   23:27:07  (  71.32,-173.47)    2.13                65
 09/07/2021   00:16:43   ( -71.21,  -6.00) 09/07/2021   00:16:37  ( -71.21,  -6.02)    0.62                 6
 09/07/2021   01:07:20   (  70.76, 162.07) 09/07/2021   01:06:09  (  70.84, 161.04)   38.83                71
 09/09/2021   15:42:22   (  71.49, -57.86) 09/09/2021   15:43:34  (  71.42, -57.44)   16.81                72
 09/09/2021   16:33:01   ( -71.27, 109.85) 09/09/2021   16:33:05  ( -71.25, 109.93)    3.08                 4
 09/09/2021   17:23:44   (  71.13, -82.60) 09/09/2021   17:22:32  (  71.15, -82.59)    2.66                72
 09/12/2021   07:58:48   (  71.90,  57.32) 09/12/2021   07:59:56  (  71.83,  59.13)   63.41                68
 09/12/2021   08:49:19   ( -71.27,-134.21) 09/12/2021   08:49:35  ( -71.24,-134.22)    3.65                16
 09/12/2021   09:40:02   (  71.13,  33.34) 09/12/2021   09:39:02  (  71.13,  33.26)    2.97                60
 09/15/2021   01:05:37   ( -71.28, -18.28) 09/15/2021   01:06:04  ( -71.27, -18.29)    0.83                27
 09/15/2021   01:56:21   (  71.19, 149.19) 09/15/2021   01:55:31  (  71.16, 149.19)    2.98                50