Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 3 5.  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, 142.91) 03/15/2021   12:48:15  ( -78.40, 139.11)   84.86                65
 03/15/2021   13:40:12   (  78.71, -51.56) 03/15/2021   13:39:01  (  78.71, -51.51)    1.37                71
 03/15/2021   14:30:57   ( -78.72, 115.69) 03/15/2021   14:30:07  ( -78.69, 115.63)    3.31                50
 03/15/2021   15:21:41   (  78.71, -76.94) 03/15/2021   15:21:01  (  78.72, -76.90)    1.28                40
 03/15/2021   16:12:26   ( -78.72,  90.31) 03/15/2021   16:12:07  ( -78.71,  90.23)    2.32                19
 03/15/2021   17:03:10   (  78.71,-102.31) 03/15/2021   17:03:01  (  78.74,-102.30)    2.50                 9
 03/15/2021   17:53:55   ( -78.72,  64.94) 03/15/2021   17:54:07  ( -78.72,  64.84)    2.20                12
 03/15/2021   18:44:39   (  78.71,-127.69) 03/15/2021   18:45:01  (  78.75,-127.70)    3.95                22
 03/15/2021   19:35:24   ( -78.72,  39.56) 03/15/2021   19:36:07  ( -78.74,  39.44)    3.05                43
 03/15/2021   20:26:09   (  78.75,-153.30) 03/15/2021   20:27:02  (  78.73,-153.34)    2.63                53
 03/15/2021   21:16:54   ( -78.76,  13.95) 03/15/2021   21:18:07  ( -78.75,  14.05)    2.34                73