Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 12 27.  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)
 12/28/2021   00:15:34   ( -71.58,  -5.47) 12/28/2021   00:16:31  ( -71.55,  -5.51)    3.17                57
 12/28/2021   01:06:18   (  71.45, 162.06) 12/28/2021   01:05:58  (  71.46, 161.98)    2.91                20
 12/28/2021   01:56:47   ( -70.62, -29.20) 12/28/2021   01:55:40  ( -70.69, -31.60)   88.76                67
 12/30/2021   15:42:45   (  71.59, -57.27) 12/30/2021   15:43:30  (  71.59, -57.18)    3.06                45
 12/30/2021   16:33:28   ( -71.48, 110.25) 12/30/2021   16:33:00  ( -71.48, 110.26)    0.43                28
 01/02/2022   07:09:54   ( -71.56,-108.98) 01/02/2022   07:10:33  ( -71.56,-109.01)    0.84                39
 01/02/2022   08:00:38   (  71.45,  58.53) 01/02/2022   08:00:00  (  71.46,  58.47)    2.22                38
 01/04/2022   22:37:04   (  71.54,-160.72) 01/04/2022   22:37:33  (  71.52,-160.81)    3.54                29
 01/04/2022   23:27:48   ( -71.47,   6.72) 01/04/2022   23:27:02  ( -71.47,   6.73)    0.29                46
 01/07/2022   13:13:45   (  72.45, -21.55) 01/07/2022   13:14:50  (  72.39, -18.70)   96.26                65
 01/07/2022   14:04:13   ( -71.56, 147.48) 01/07/2022   14:04:33  ( -71.58, 147.53)    3.28                20
 01/07/2022   14:54:57   (  71.45, -45.03) 01/07/2022   14:54:00  (  71.48, -45.00)    2.70                57