Simultaneous Nadir Overpasses (SNOs) between FY3D and METOP-C
TLE Epoch: 2021 9 17.  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)
 09/30/2021   19:07:45   (  74.35,-115.00) 09/30/2021   19:08:50  (  74.34,-111.74)   97.61                65
 09/30/2021   19:58:28   ( -74.33,  52.37) 09/30/2021   19:59:34  ( -74.26,  55.39)   91.29                66
 09/30/2021   20:49:09   (  74.11,-139.75) 09/30/2021   20:50:18  (  74.02,-137.88)   57.83                69
 09/30/2021   21:39:51   ( -74.04,  27.73) 09/30/2021   21:41:01  ( -73.99,  29.38)   50.78                70
 09/30/2021   22:30:32   (  73.82,-164.40) 09/30/2021   22:31:45  (  73.75,-163.87)   18.03                73
 09/30/2021   23:21:15   ( -73.80,   2.95) 09/30/2021   23:22:28  ( -73.72,   3.39)   16.22                73
 10/01/2021   00:11:58   (  73.67, 170.58) 10/01/2021   00:13:08  (  73.67, 170.61)    1.14                70
 10/01/2021   01:02:41   ( -73.66, -22.07) 10/01/2021   01:03:51  ( -73.65, -22.12)    1.69                70