Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 12 29.  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)
 12/30/2021   15:42:44   (  71.57, -57.23) 12/30/2021   15:43:30  (  71.57, -57.23)    0.48                46
 12/30/2021   16:33:27   ( -71.45, 110.29) 12/30/2021   16:33:00  ( -71.45, 110.21)    2.71                27
 01/02/2022   07:09:54   ( -71.59,-109.05) 01/02/2022   07:10:32  ( -71.58,-108.97)    3.04                38
 01/02/2022   08:00:38   (  71.48,  58.47) 01/02/2022   07:59:59  (  71.48,  58.51)    1.67                39
 01/04/2022   22:37:04   (  71.58,-160.79) 01/04/2022   22:37:32  (  71.55,-160.77)    3.28                28
 01/04/2022   23:27:47   ( -71.45,   6.74) 01/04/2022   23:27:02  ( -71.43,   6.67)    3.35                45
 01/07/2022   13:13:45   (  72.45, -21.54) 01/07/2022   13:14:51  (  72.35, -18.76)   93.93                66
 01/07/2022   14:04:13   ( -71.55, 147.49) 01/07/2022   14:04:34  ( -71.54, 147.46)    1.11                21
 01/07/2022   14:54:57   (  71.45, -45.01) 01/07/2022   14:54:01  (  71.44, -45.06)    1.76                56
 01/10/2022   04:40:49   ( -72.16, -72.75) 01/10/2022   04:41:58  ( -72.07, -71.02)   59.74                69
 01/10/2022   05:31:22   (  71.55,  95.71) 01/10/2022   05:31:32  (  71.54,  95.71)    1.24                10
 01/10/2022   06:22:06   ( -71.47, -96.83) 01/10/2022   06:21:01  ( -71.48, -96.75)    3.31                65