Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 5 7.  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, 178.94) 05/09/2021   10:22:48  ( -78.51, 178.30)   14.22                74
 05/09/2021   11:14:49   (  78.59, -14.15) 05/09/2021   11:13:49  (  78.57, -14.04)    3.20                60
 05/09/2021   12:05:32   ( -78.56, 153.33) 05/09/2021   12:04:46  ( -78.59, 153.37)    3.35                46
 05/09/2021   12:56:18   (  78.59, -39.53) 05/09/2021   12:55:49  (  78.58, -39.44)    1.98                29
 05/09/2021   13:47:02   ( -78.60, 127.72) 05/09/2021   13:46:47  ( -78.57, 127.72)    3.60                15
 05/09/2021   14:37:47   (  78.59, -64.91) 05/09/2021   14:37:49  (  78.60, -64.85)    1.29                 2
 05/09/2021   15:28:31   ( -78.60, 102.34) 05/09/2021   15:28:47  ( -78.58, 102.31)    2.46                16
 05/09/2021   16:19:16   (  78.59, -90.29) 05/09/2021   16:19:49  (  78.61, -90.26)    1.86                33
 05/09/2021   17:10:00   ( -78.60,  76.96) 05/09/2021   17:10:47  ( -78.59,  76.90)    1.75                47
 05/09/2021   18:00:45   (  78.59,-115.67) 05/09/2021   18:01:49  (  78.62,-115.67)    3.04                64
 05/09/2021   18:51:33   ( -78.75,  50.64) 05/09/2021   18:52:44  ( -78.71,  52.22)   34.76                71