Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 1 22.  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)
 01/24/2021   16:07:44   (  70.84, -64.64) 01/24/2021   16:08:21  (  70.82, -64.61)    2.45                37
 01/24/2021   16:58:24   ( -70.69, 102.92) 01/24/2021   16:57:51  ( -70.70, 102.84)    3.00                33
 01/27/2021   08:24:05   (  70.85,  51.27) 01/27/2021   08:24:49  (  70.87,  51.34)    3.46                44
 01/27/2021   09:14:46   ( -70.75,-141.25) 01/27/2021   09:14:19  ( -70.76,-141.20)    1.95                27
 01/30/2021   00:40:26   (  70.86, 167.18) 01/30/2021   00:41:18  (  70.86, 167.21)    1.10                52
 01/30/2021   01:31:07   ( -70.76, -25.33) 01/30/2021   01:30:48  ( -70.75, -25.33)    1.12                19
 01/30/2021   02:21:35   (  69.81, 143.47) 01/30/2021   02:20:29  (  69.88, 141.05)   93.26                66
 02/01/2021   16:56:47   (  70.87, -76.91) 02/01/2021   16:57:47  (  70.85, -76.93)    2.69                60
 02/01/2021   17:47:28   ( -70.77,  90.58) 02/01/2021   17:47:16  ( -70.80,  90.62)    3.35                12
 02/01/2021   18:38:02   (  70.14,-101.10) 02/01/2021   18:36:52  (  70.20,-102.62)   57.71                70
 02/04/2021   09:13:07   (  70.89,  38.99) 02/04/2021   09:14:14  (  70.89,  39.01)    0.82                67
 02/04/2021   10:03:48   ( -70.78,-153.51) 02/04/2021   10:03:44  ( -70.78,-153.52)    0.33                 4
 02/04/2021   10:54:27   (  70.42,  14.39) 02/04/2021   10:53:15  (  70.46,  13.64)   28.40                72