Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 12 24.  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   (  71.60,  46.26) 12/25/2021   08:49:28  (  71.58,  46.30)    2.92                63
 12/25/2021   09:39:08   ( -71.49,-146.24) 12/25/2021   09:38:57  ( -71.51,-146.17)    3.11                11
 12/25/2021   10:29:42   (  70.85,  22.19) 12/25/2021   10:28:33  (  70.93,  20.53)   61.09                69
 12/28/2021   00:15:34   ( -71.57,  -5.46) 12/28/2021   00:16:31  ( -71.56,  -5.50)    2.15                57
 12/28/2021   01:06:18   (  71.45, 162.06) 12/28/2021   01:05:58  (  71.46, 161.98)    2.93                20
 12/28/2021   01:56:47   ( -70.61, -29.19) 12/28/2021   01:55:40  ( -70.69, -31.59)   88.85                67
 12/30/2021   15:42:45   (  71.59, -57.27) 12/30/2021   15:43:30  (  71.60, -57.18)    3.09                45
 12/30/2021   16:33:28   ( -71.47, 110.26) 12/30/2021   16:33:00  ( -71.48, 110.27)    1.37                28
 01/02/2022   07:09:54   ( -71.55,-108.97) 01/02/2022   07:10:33  ( -71.56,-109.00)    1.15                39
 01/02/2022   08:00:38   (  71.44,  58.53) 01/02/2022   08:00:00  (  71.45,  58.47)    2.35                38
 01/04/2022   22:37:05   (  71.59,-160.81) 01/04/2022   22:37:32  (  71.57,-160.73)    3.43                27
 01/04/2022   23:27:48   ( -71.46,   6.73) 01/04/2022   23:27:02  ( -71.46,   6.73)    0.51                46