Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 5 8.  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  ( -78.49, 178.17)   19.59                73
 05/09/2021   11:14:49   (  78.57, -14.03) 05/09/2021   11:13:49  (  78.59, -13.92)    2.99                60
 05/09/2021   12:05:33   ( -78.58, 153.21) 05/09/2021   12:04:47  ( -78.57, 153.24)    1.18                46
 05/09/2021   12:56:18   (  78.57, -39.41) 05/09/2021   12:55:49  (  78.60, -39.33)    3.60                29
 05/09/2021   13:47:02   ( -78.58, 127.84) 05/09/2021   13:46:47  ( -78.58, 127.83)    0.24                15
 05/09/2021   14:37:48   (  78.61, -65.02) 05/09/2021   14:37:50  (  78.58, -64.98)    3.75                 2
 05/09/2021   15:28:31   ( -78.58, 102.46) 05/09/2021   15:28:47  ( -78.60, 102.42)    1.65                16
 05/09/2021   16:19:17   (  78.61, -90.40) 05/09/2021   16:19:50  (  78.59, -90.39)    2.35                33
 05/09/2021   17:10:00   ( -78.59,  77.08) 05/09/2021   17:10:47  ( -78.61,  77.01)    3.05                47
 05/09/2021   18:00:46   (  78.61,-115.78) 05/09/2021   18:01:50  (  78.60,-115.79)    1.07                64
 05/09/2021   18:51:33   ( -78.74,  50.76) 05/09/2021   18:52:44  ( -78.73,  52.34)   34.33                71