Simultaneous Nadir Overpasses (SNOs) between FY3D and METOP-C
TLE Epoch: 2021 3 27.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(METOP-C) METOP-C Lat/Lon    Distance(km)  Time Diff(sec)
 04/09/2021   19:59:51   ( -74.02,  51.56) 04/09/2021   20:00:57  ( -73.94,  54.64)   95.04                66
 04/09/2021   20:50:32   (  73.83,-140.68) 04/09/2021   20:51:40  (  73.81,-138.33)   72.69                68
 04/09/2021   21:41:14   ( -73.72,  26.90) 04/09/2021   21:42:24  ( -73.67,  28.67)   55.31                70
 04/09/2021   22:31:56   (  73.59,-165.46) 04/09/2021   22:33:07  (  73.54,-164.30)   36.83                71
 04/09/2021   23:22:38   ( -73.48,   2.11) 04/09/2021   23:23:51  ( -73.40,   2.71)   20.80                73
 04/10/2021   00:13:20   (  73.34, 169.74) 04/10/2021   00:14:33  (  73.32, 169.86)    4.49                73
 04/10/2021   01:04:03   ( -73.28, -22.81) 04/10/2021   01:05:15  ( -73.28, -22.90)    2.95                72
 04/10/2021   01:54:47   (  73.29, 144.48) 04/10/2021   01:55:54  (  73.30, 144.47)    0.69                67