Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 3 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)
 03/15/2021   12:49:20   ( -78.42, 142.92) 03/15/2021   12:48:15  ( -78.41, 139.16)   84.04                65
 03/15/2021   13:40:12   (  78.71, -51.56) 03/15/2021   13:39:01  (  78.71, -51.46)    2.21                71
 03/15/2021   14:30:57   ( -78.72, 115.70) 03/15/2021   14:30:07  ( -78.70, 115.68)    2.04                50
 03/15/2021   15:21:41   (  78.71, -76.93) 03/15/2021   15:21:01  (  78.73, -76.86)    2.46                40
 03/15/2021   16:12:26   ( -78.72,  90.33) 03/15/2021   16:12:07  ( -78.72,  90.29)    1.03                19
 03/15/2021   17:03:10   (  78.71,-102.31) 03/15/2021   17:03:01  (  78.74,-102.25)    3.47                 9
 03/15/2021   17:53:55   ( -78.72,  64.95) 03/15/2021   17:54:07  ( -78.73,  64.89)    1.72                12
 03/15/2021   18:44:40   (  78.75,-127.92) 03/15/2021   18:45:02  (  78.72,-127.90)    3.27                22
 03/15/2021   19:35:24   ( -78.72,  39.58) 03/15/2021   19:36:07  ( -78.74,  39.50)    3.13                43
 03/15/2021   20:26:09   (  78.75,-153.30) 03/15/2021   20:27:02  (  78.74,-153.29)    1.74                53
 03/15/2021   21:16:54   ( -78.76,  13.97) 03/15/2021   21:18:07  ( -78.76,  14.10)    2.94                73