Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 1 30.  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)
 02/01/2021   16:56:47   (  70.89, -76.94) 02/01/2021   16:57:46  (  70.89, -76.87)    2.44                59
 02/01/2021   17:47:28   ( -70.80,  90.54) 02/01/2021   17:47:16  ( -70.77,  90.58)    3.08                12
 02/01/2021   18:38:01   (  70.10,-101.04) 02/01/2021   18:36:52  (  70.18,-102.65)   61.27                69
 02/04/2021   09:13:07   (  70.85,  39.05) 02/04/2021   09:14:15  (  70.87,  38.97)    3.14                68
 02/04/2021   10:03:49   ( -70.81,-153.55) 02/04/2021   10:03:44  ( -70.81,-153.48)    2.54                 5
 02/04/2021   10:54:27   (  70.38,  14.45) 02/04/2021   10:53:16  (  70.44,  13.60)   32.09                71
 02/07/2021   01:29:30   (  71.03, 154.68) 02/07/2021   01:30:41  (  70.95, 154.98)   13.95                71
 02/07/2021   02:20:08   ( -70.77, -37.56) 02/07/2021   02:20:12  ( -70.79, -37.64)    3.38                 4
 02/07/2021   03:10:52   (  70.66, 129.92) 02/07/2021   03:09:39  (  70.68, 129.85)    3.34                73
 02/09/2021   17:45:55   (  71.26, -89.79) 02/09/2021   17:47:06  (  71.14, -88.84)   36.36                71
 02/09/2021   18:36:30   ( -70.84,  78.25) 02/09/2021   18:36:40  ( -70.81,  78.28)    2.88                10
 02/09/2021   19:27:13   (  70.69,-114.19) 02/09/2021   19:26:07  (  70.71,-114.23)    3.00                66
 02/12/2021   10:02:21   (  71.54,  25.64) 02/12/2021   10:03:29  (  71.43,  27.51)   67.03                68
 02/12/2021   10:52:51   ( -70.86,-165.85) 02/12/2021   10:53:08  ( -70.84,-165.81)    2.68                17
 02/12/2021   11:43:34   (  70.71,   1.71) 02/12/2021   11:42:35  (  70.73,   1.68)    2.26                59