Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 2 10.  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)
 02/12/2021   10:02:21   (  71.56,  25.61) 02/12/2021   10:03:29  (  71.43,  27.49)   67.89                68
 02/12/2021   10:52:50   ( -70.83,-165.80) 02/12/2021   10:53:08  ( -70.82,-165.84)    1.93                18
 02/12/2021   11:43:34   (  70.73,   1.68) 02/12/2021   11:42:35  (  70.72,   1.66)    0.86                59
 02/15/2021   02:18:47   (  71.84, 141.02) 02/15/2021   02:19:52  (  71.71, 143.85)   99.51                65
 02/15/2021   03:09:11   ( -70.85, -49.91) 02/15/2021   03:09:36  ( -70.84, -49.93)    1.72                25
 02/15/2021   03:59:55   (  70.75, 117.56) 02/15/2021   03:59:03  (  70.74, 117.57)    1.66                52
 02/17/2021   19:25:32   ( -70.88,  65.98) 02/17/2021   19:26:04  ( -70.85,  65.98)    2.51                32
 02/17/2021   20:16:14   (  70.73,-126.47) 02/17/2021   20:15:30  (  70.75,-126.54)    3.23                44
 02/20/2021   11:41:51   ( -70.85,-178.05) 02/20/2021   11:42:31  ( -70.87,-178.13)    3.30                40
 02/20/2021   12:32:35   (  70.77, -10.59) 02/20/2021   12:31:58  (  70.76, -10.64)    1.88                37
 02/23/2021   03:58:12   ( -70.88, -62.17) 02/23/2021   03:58:59  ( -70.87, -62.23)    2.70                47
 02/23/2021   04:48:56   (  70.80, 105.28) 02/23/2021   04:48:25  (  70.82, 105.33)    2.66                31