Simultaneous Nadir Overpasses (SNOs) between FY3D and METOP-A
TLE Epoch: 2021 11 25.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(METOP-A) METOP-A Lat/Lon    Distance(km)  Time Diff(sec)
 11/25/2021   13:56:29   ( -77.73, 131.56) 11/25/2021   13:56:53  ( -77.72, 131.49)    2.50                24
 11/25/2021   14:47:15   (  77.70, -60.97) 11/25/2021   14:46:14  (  77.69, -60.95)    1.17                61
 11/28/2021   08:46:47   (  77.74,  29.00) 11/28/2021   08:47:54  (  77.73,  28.88)    2.87                67
 11/28/2021   09:37:31   ( -77.70,-163.51) 11/28/2021   09:37:28  ( -77.72,-163.55)    2.82                 3
 11/28/2021   10:28:13   (  77.50,   4.73) 11/28/2021   10:27:02  (  77.49,   3.08)   39.79                71
 12/01/2021   04:27:50   (  77.73,  93.76) 12/01/2021   04:28:36  (  77.74,  93.85)    2.34                46
 12/01/2021   05:18:34   ( -77.69, -98.71) 12/01/2021   05:18:03  ( -77.68, -98.81)    2.64                31
 12/04/2021   00:08:55   (  77.72, 158.59) 12/04/2021   00:09:20  (  77.71, 158.60)    0.77                25
 12/04/2021   00:59:39   ( -77.66, -33.85) 12/04/2021   00:58:38  ( -77.68, -33.87)    1.66                61
 12/06/2021   18:59:16   ( -77.74,  55.92) 12/06/2021   19:00:10  ( -77.71,  55.98)    3.20                54
 12/06/2021   19:50:01   (  77.68,-136.51) 12/06/2021   19:50:03  (  77.71,-136.51)    2.48                 2