Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 5 5.  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, 178.31)   14.08                74
 05/09/2021   11:14:48   (  78.55, -13.93) 05/09/2021   11:13:49  (  78.57, -14.04)    2.98                59
 05/09/2021   12:05:32   ( -78.56, 153.33) 05/09/2021   12:04:46  ( -78.59, 153.37)    3.28                46
 05/09/2021   12:56:18   (  78.59, -39.54) 05/09/2021   12:55:49  (  78.58, -39.45)    2.40                29
 05/09/2021   13:47:02   ( -78.60, 127.71) 05/09/2021   13:46:47  ( -78.57, 127.72)    3.73                15
 05/09/2021   14:37:47   (  78.59, -64.92) 05/09/2021   14:37:49  (  78.59, -64.86)    1.47                 2
 05/09/2021   15:28:31   ( -78.60, 102.33) 05/09/2021   15:28:47  ( -78.58, 102.31)    2.54                16
 05/09/2021   16:19:16   (  78.60, -90.30) 05/09/2021   16:19:49  (  78.61, -90.26)    1.61                33
 05/09/2021   17:10:00   ( -78.61,  76.95) 05/09/2021   17:10:47  ( -78.59,  76.90)    1.72                47
 05/09/2021   18:00:45   (  78.60,-115.68) 05/09/2021   18:01:49  (  78.62,-115.67)    2.64                64
 05/09/2021   18:51:33   ( -78.76,  50.63) 05/09/2021   18:52:44  ( -78.71,  52.22)   34.96                71