Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 2 8.  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)
 02/09/2021   17:45:55   (  71.26, -89.79) 02/09/2021   17:47:06  (  71.14, -88.84)   36.45                71
 02/09/2021   18:36:29   ( -70.80,  78.32) 02/09/2021   18:36:40  ( -70.81,  78.26)    2.18                11
 02/09/2021   19:27:13   (  70.69,-114.19) 02/09/2021   19:26:07  (  70.71,-114.24)    2.97                66
 02/12/2021   10:02:21   (  71.55,  25.64) 02/12/2021   10:03:29  (  71.44,  27.51)   67.27                68
 02/12/2021   10:52:50   ( -70.82,-165.78) 02/12/2021   10:53:08  ( -70.83,-165.82)    2.03                18
 02/12/2021   11:43:34   (  70.71,   1.70) 02/12/2021   11:42:35  (  70.73,   1.68)    2.33                59
 02/15/2021   02:18:47   (  71.83, 141.04) 02/15/2021   02:19:52  (  71.72, 143.87)   98.99                65
 02/15/2021   03:09:11   ( -70.84, -49.88) 02/15/2021   03:09:36  ( -70.85, -49.91)    1.76                25
 02/15/2021   03:59:55   (  70.74, 117.59) 02/15/2021   03:59:03  (  70.75, 117.58)    1.17                52
 02/17/2021   19:25:31   ( -70.86,  66.01) 02/17/2021   19:26:03  ( -70.87,  66.00)    0.98                32
 02/17/2021   20:16:15   (  70.77,-126.53) 02/17/2021   20:15:30  (  70.76,-126.52)    0.79                45
 02/20/2021   11:41:52   ( -70.89,-178.10) 02/20/2021   11:42:31  ( -70.88,-178.10)    0.42                39
 02/20/2021   12:32:36   (  70.80, -10.65) 02/20/2021   12:31:58  (  70.77, -10.62)    3.17                38