Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 5 3.  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   ( -78.50, 179.05) 05/09/2021   10:22:49  ( -78.48, 178.11)   20.96                73
 05/09/2021   11:14:49   (  78.57, -14.06) 05/09/2021   11:13:49  (  78.57, -14.01)    1.19                60
 05/09/2021   12:05:33   ( -78.58, 153.21) 05/09/2021   12:04:47  ( -78.56, 153.18)    2.31                46
 05/09/2021   12:56:18   (  78.58, -39.44) 05/09/2021   12:55:49  (  78.59, -39.42)    1.26                29
 05/09/2021   13:47:02   ( -78.58, 127.83) 05/09/2021   13:46:47  ( -78.57, 127.77)    1.66                15
 05/09/2021   14:37:47   (  78.58, -64.82) 05/09/2021   14:37:49  (  78.60, -64.82)    2.43                 2
 05/09/2021   15:28:31   ( -78.58, 102.45) 05/09/2021   15:28:47  ( -78.59, 102.36)    2.06                16
 05/09/2021   16:19:16   (  78.58, -90.20) 05/09/2021   16:19:49  (  78.61, -90.23)    3.79                33
 05/09/2021   17:10:00   ( -78.59,  77.07) 05/09/2021   17:10:47  ( -78.60,  76.95)    3.12                47
 05/09/2021   18:00:46   (  78.62,-115.81) 05/09/2021   18:01:50  (  78.59,-115.88)    3.36                64
 05/09/2021   18:51:33   ( -78.74,  50.75) 05/09/2021   18:52:44  ( -78.72,  52.27)   33.10                71