Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 5 2.  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   ( -78.49, 179.13) 05/09/2021   10:22:49  ( -78.49, 178.19)   20.97                73
 05/09/2021   11:14:49   (  78.56, -13.98) 05/09/2021   11:13:49  (  78.58, -13.93)    2.67                60
 05/09/2021   12:05:33   ( -78.57, 153.30) 05/09/2021   12:04:47  ( -78.57, 153.26)    1.04                46
 05/09/2021   12:56:18   (  78.56, -39.36) 05/09/2021   12:55:49  (  78.60, -39.34)    3.81                29
 05/09/2021   13:47:02   ( -78.57, 127.92) 05/09/2021   13:46:47  ( -78.59, 127.85)    2.41                15
 05/09/2021   14:37:48   (  78.60, -64.97) 05/09/2021   14:37:50  (  78.57, -64.99)    3.01                 2
 05/09/2021   15:28:32   ( -78.61, 102.31) 05/09/2021   15:28:47  ( -78.60, 102.44)    3.06                15
 05/09/2021   16:19:17   (  78.60, -90.35) 05/09/2021   16:19:50  (  78.59, -90.40)    1.98                33
 05/09/2021   17:10:01   ( -78.61,  76.93) 05/09/2021   17:10:47  ( -78.61,  77.02)    2.18                46
 05/09/2021   18:00:46   (  78.60,-115.73) 05/09/2021   18:01:50  (  78.60,-115.80)    1.72                64
 05/09/2021   18:51:33   ( -78.72,  50.84) 05/09/2021   18:52:45  ( -78.69,  52.10)   27.69                72