Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 5 9.  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)
 05/09/2021   10:24:02   ( -78.52, 178.96) 05/09/2021   10:22:48  ( -78.51, 178.32)   14.21                74
 05/09/2021   11:14:49   (  78.58, -14.12) 05/09/2021   11:13:49  (  78.57, -14.01)    2.64                60
 05/09/2021   12:05:32   ( -78.56, 153.35) 05/09/2021   12:04:46  ( -78.59, 153.39)    3.99                46
 05/09/2021   12:56:18   (  78.58, -39.50) 05/09/2021   12:55:49  (  78.59, -39.42)    1.80                29
 05/09/2021   13:47:02   ( -78.60, 127.74) 05/09/2021   13:46:47  ( -78.57, 127.74)    2.93                15
 05/09/2021   14:37:47   (  78.59, -64.88) 05/09/2021   14:37:49  (  78.60, -64.82)    1.89                 2
 05/09/2021   15:28:31   ( -78.60, 102.36) 05/09/2021   15:28:47  ( -78.58, 102.33)    1.84                16
 05/09/2021   16:19:16   (  78.59, -90.26) 05/09/2021   16:19:49  (  78.61, -90.23)    2.82                33
 05/09/2021   17:10:00   ( -78.60,  76.98) 05/09/2021   17:10:47  ( -78.60,  76.92)    1.47                47
 05/09/2021   18:00:46   (  78.63,-115.87) 05/09/2021   18:01:50  (  78.59,-115.88)    4.02                64
 05/09/2021   18:51:33   ( -78.75,  50.66) 05/09/2021   18:52:44  ( -78.71,  52.24)   34.62                71