Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 3 4.  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   ( -78.44, 142.81) 03/15/2021   12:48:14  ( -78.43, 139.29)   78.45                66
 03/15/2021   13:40:11   (  78.69, -51.43) 03/15/2021   13:39:01  (  78.70, -51.56)    2.97                70
 03/15/2021   14:30:56   ( -78.70, 115.82) 03/15/2021   14:30:06  ( -78.72, 115.82)    2.26                50
 03/15/2021   15:21:41   (  78.73, -77.05) 03/15/2021   15:21:01  (  78.71, -76.96)    2.56                40
 03/15/2021   16:12:25   ( -78.70,  90.45) 03/15/2021   16:12:06  ( -78.74,  90.42)    3.80                19
 03/15/2021   17:03:10   (  78.73,-102.42) 03/15/2021   17:03:01  (  78.73,-102.36)    1.43                 9
 03/15/2021   17:53:55   ( -78.74,  64.84) 03/15/2021   17:54:07  ( -78.72,  64.78)    2.83                12
 03/15/2021   18:44:39   (  78.73,-127.80) 03/15/2021   18:45:01  (  78.74,-127.75)    1.54                22
 03/15/2021   19:35:24   ( -78.74,  39.46) 03/15/2021   19:36:07  ( -78.73,  39.39)    1.90                43
 03/15/2021   20:26:08   (  78.73,-153.17) 03/15/2021   20:27:01  (  78.76,-153.15)    2.73                53
 03/15/2021   21:16:53   ( -78.74,  14.09) 03/15/2021   21:18:07  ( -78.74,  13.99)    2.03                74