Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 7 14.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(NOAA-19) NOAA-19 Lat/Lon    Distance(km)  Time Diff(sec)
 07/17/2021   03:28:49   ( -78.39, -76.02) 07/17/2021   03:27:46  ( -78.40, -76.01)    0.37                63
 07/17/2021   04:19:34   (  78.42,  91.16) 07/17/2021   04:18:42  (  78.38,  91.15)    4.04                52
 07/17/2021   05:10:18   ( -78.39,-101.40) 07/17/2021   05:09:46  ( -78.41,-101.44)    1.53                32
 07/17/2021   06:01:03   (  78.42,  65.78) 07/17/2021   06:00:42  (  78.39,  65.72)    3.39                21
 07/17/2021   06:51:47   ( -78.40,-126.79) 07/17/2021   06:51:46  ( -78.42,-126.87)    2.87                 1
 07/17/2021   07:42:32   (  78.42,  40.39) 07/17/2021   07:42:42  (  78.40,  40.29)    3.22                10
 07/17/2021   08:33:17   ( -78.44,-152.40) 07/17/2021   08:33:46  ( -78.43,-152.30)    2.51                29
 07/17/2021   09:24:01   (  78.42,  15.01) 07/17/2021   09:24:41  (  78.45,  15.09)    3.27                40
 07/17/2021   10:14:46   ( -78.44,-177.78) 07/17/2021   10:15:46  ( -78.44,-177.72)    1.31                60
 07/17/2021   11:05:30   (  78.42, -10.38) 07/17/2021   11:06:41  (  78.46, -10.33)    3.65                71