Simultaneous Nadir Overpasses (SNOs) between FY3D and METOP-A
TLE Epoch: 2021 9 15.  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)
 09/15/2021   01:58:31   (  77.43, 131.86) 09/15/2021   01:57:16  (  77.43, 131.74)    2.82                75
 09/15/2021   02:49:13   ( -77.37, -60.53) 09/15/2021   02:47:59  ( -77.37, -61.18)   15.64                74
 09/15/2021   03:39:52   (  77.10, 107.98) 09/15/2021   03:38:45  (  77.10, 105.04)   72.89                67
 09/15/2021   04:30:34   ( -77.03, -84.43) 09/15/2021   04:29:29  ( -76.99, -88.03)   90.12                65