Simultaneous Nadir Overpasses (SNOs) between FY3D and METOP-A
TLE Epoch: 2021 11 21.  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)
 11/22/2021   11:29:22   ( -77.76, 168.17) 11/22/2021   11:30:22  ( -77.78, 168.28)    3.08                60
 11/22/2021   12:20:08   (  77.73, -24.34) 11/22/2021   12:20:11  (  77.72, -24.43)    2.30                 3
 11/22/2021   13:10:52   ( -77.70, 143.10) 11/22/2021   13:10:22  ( -77.71, 142.99)    2.76                30
 11/27/2021   00:37:47   (  77.76, 151.14) 11/27/2021   00:38:39  (  77.73, 151.05)    3.13                52
 11/27/2021   01:28:31   ( -77.72, -41.38) 11/27/2021   01:28:42  ( -77.75, -41.41)    3.06                11
 11/27/2021   02:19:18   (  77.73, 125.88) 11/27/2021   02:18:38  (  77.72, 125.98)    2.80                40
 11/27/2021   03:09:54   ( -77.36, -65.07) 11/27/2021   03:08:47  ( -77.46, -67.68)   64.09                67
 12/01/2021   13:46:14   ( -77.76, 134.02) 12/01/2021   13:47:02  ( -77.77, 134.15)    3.11                48
 12/01/2021   14:37:00   (  77.74, -58.56) 12/01/2021   14:37:06  (  77.73, -58.55)    0.84                 6
 12/01/2021   15:27:44   ( -77.69, 108.98) 12/01/2021   15:27:02  ( -77.71, 108.85)    3.27                42