Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 9 4.  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,  70.62) 09/04/2021   07:10:38  (  71.29,  70.59)    1.86                55
 09/04/2021   08:00:25   ( -71.21,-121.94) 09/04/2021   08:00:07  ( -71.22,-121.88)    2.73                18
 09/04/2021   08:50:54   (  70.34,  46.82) 09/04/2021   08:49:47  (  70.42,  44.53)   86.00                67
 09/06/2021   23:26:02   (  71.33,-173.52) 09/06/2021   23:27:07  (  71.33,-173.46)    2.09                65
 09/07/2021   00:16:42   ( -71.21,  -6.00) 09/07/2021   00:16:36  ( -71.22,  -6.01)    0.93                 6
 09/07/2021   01:07:19   (  70.76, 162.08) 09/07/2021   01:06:08  (  70.85, 161.05)   39.09                71
 09/09/2021   15:42:23   (  71.54, -57.95) 09/09/2021   15:43:34  (  71.42, -57.43)   22.03                71
 09/09/2021   16:33:01   ( -71.27, 109.85) 09/09/2021   16:33:05  ( -71.26, 109.94)    2.97                 4
 09/09/2021   17:23:44   (  71.12, -82.59) 09/09/2021   17:22:33  (  71.10, -82.67)    3.57                71
 09/12/2021   07:58:48   (  71.90,  57.32) 09/12/2021   07:59:57  (  71.78,  59.05)   61.27                69
 09/12/2021   08:49:19   ( -71.27,-134.21) 09/12/2021   08:49:35  ( -71.24,-134.21)    2.95                16
 09/12/2021   09:40:02   (  71.13,  33.35) 09/12/2021   09:39:02  (  71.14,  33.27)    3.09                60
 09/15/2021   01:05:37   ( -71.28, -18.28) 09/15/2021   01:06:04  ( -71.28, -18.28)    0.19                27
 09/15/2021   01:56:21   (  71.19, 149.19) 09/15/2021   01:55:31  (  71.17, 149.20)    2.04                50
 09/17/2021   17:21:54   ( -71.29,  97.65) 09/17/2021   17:22:32  ( -71.30,  97.65)    1.86                38
 09/17/2021   18:12:38   (  71.20, -94.88) 09/17/2021   18:11:59  (  71.20, -94.88)    0.24                39