Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 3 10.  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)
 03/15/2021   12:49:20   ( -78.42, 142.90) 03/15/2021   12:48:15  ( -78.41, 139.17)   83.19                65
 03/15/2021   13:40:12   (  78.71, -51.55) 03/15/2021   13:39:01  (  78.72, -51.42)    3.09                71
 03/15/2021   14:30:57   ( -78.72, 115.68) 03/15/2021   14:30:07  ( -78.70, 115.69)    2.22                50
 03/15/2021   15:21:41   (  78.71, -76.93) 03/15/2021   15:21:02  (  78.70, -77.06)    3.23                39
 03/15/2021   16:12:26   ( -78.72,  90.30) 03/15/2021   16:12:07  ( -78.72,  90.30)    0.69                19
 03/15/2021   17:03:10   (  78.71,-102.30) 03/15/2021   17:03:02  (  78.71,-102.46)    3.49                 8
 03/15/2021   17:53:55   ( -78.73,  64.93) 03/15/2021   17:54:07  ( -78.73,  64.90)    0.97                12
 03/15/2021   18:44:40   (  78.75,-127.92) 03/15/2021   18:45:02  (  78.73,-127.86)    2.68                22
 03/15/2021   19:35:24   ( -78.73,  39.55) 03/15/2021   19:36:07  ( -78.75,  39.51)    2.50                43
 03/15/2021   20:26:09   (  78.75,-153.29) 03/15/2021   20:27:02  (  78.74,-153.26)    1.20                53
 03/15/2021   21:16:54   ( -78.76,  13.94) 03/15/2021   21:18:07  ( -78.76,  14.11)    3.79                73