Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 3 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)
 03/15/2021   12:49:20   ( -78.41, 142.94) 03/15/2021   12:48:15  ( -78.42, 139.21)   83.22                65
 03/15/2021   13:40:11   (  78.70, -51.52) 03/15/2021   13:39:01  (  78.69, -51.64)    3.11                70
 03/15/2021   14:30:56   ( -78.72, 115.72) 03/15/2021   14:30:06  ( -78.71, 115.73)    0.97                50
 03/15/2021   15:21:40   (  78.71, -76.89) 03/15/2021   15:21:01  (  78.70, -77.04)    3.10                39
 03/15/2021   16:12:25   ( -78.72,  90.34) 03/15/2021   16:12:06  ( -78.72,  90.34)    0.59                19
 03/15/2021   17:03:10   (  78.74,-102.51) 03/15/2021   17:03:01  (  78.72,-102.43)    3.31                 9
 03/15/2021   17:53:54   ( -78.72,  64.97) 03/15/2021   17:54:06  ( -78.74,  64.94)    2.15                12
 03/15/2021   18:44:39   (  78.74,-127.88) 03/15/2021   18:45:01  (  78.73,-127.83)    1.83                22
 03/15/2021   19:35:23   ( -78.72,  39.59) 03/15/2021   19:36:06  ( -78.75,  39.54)    3.70                43
 03/15/2021   20:26:08   (  78.75,-153.26) 03/15/2021   20:27:01  (  78.75,-153.23)    0.68                53
 03/15/2021   21:16:53   ( -78.76,  13.98) 03/15/2021   21:18:07  ( -78.73,  13.90)    3.26                74