Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 12 23.  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)
 12/25/2021   08:48:25   (  71.56,  46.33) 12/25/2021   08:49:29  (  71.56,  46.28)    2.02                64
 12/25/2021   09:39:09   ( -71.50,-146.25) 12/25/2021   09:38:58  ( -71.50,-146.19)    2.23                11
 12/25/2021   10:29:43   (  70.86,  22.18) 12/25/2021   10:28:34  (  70.92,  20.52)   60.83                69
 12/28/2021   00:15:34   ( -71.58,  -5.47) 12/28/2021   00:16:30  ( -71.60,  -5.43)    2.72                56
 12/28/2021   01:06:18   (  71.46, 162.05) 12/28/2021   01:05:58  (  71.44, 161.96)    3.45                20
 12/28/2021   01:56:47   ( -70.62, -29.20) 12/28/2021   01:55:40  ( -70.68, -31.61)   88.82                67
 12/30/2021   15:42:45   (  71.60, -57.28) 12/30/2021   15:43:30  (  71.58, -57.20)    3.27                45
 12/30/2021   16:33:28   ( -71.48, 110.25) 12/30/2021   16:33:00  ( -71.47, 110.25)    0.76                28
 01/02/2022   07:09:54   ( -71.56,-108.99) 01/02/2022   07:10:33  ( -71.55,-109.02)    2.03                39
 01/02/2022   08:00:38   (  71.45,  58.52) 01/02/2022   08:00:00  (  71.44,  58.45)    2.72                38
 01/04/2022   22:37:04   (  71.54,-160.73) 01/04/2022   22:37:32  (  71.56,-160.75)    1.84                28
 01/04/2022   23:27:48   ( -71.46,   6.72) 01/04/2022   23:27:02  ( -71.45,   6.70)    1.72                46