Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 1 7.  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)
 01/19/2021   16:56:04   ( -78.83,  78.44) 01/19/2021   16:54:51  ( -78.85,  78.38)    2.21                73
 01/19/2021   17:46:50   (  78.86,-114.42) 01/19/2021   17:45:56  (  78.85,-114.40)    1.25                54
 01/19/2021   18:37:34   ( -78.87,  52.82) 01/19/2021   18:36:51  ( -78.86,  52.99)    3.57                43
 01/19/2021   19:28:19   (  78.86,-139.79) 01/19/2021   19:27:56  (  78.86,-139.79)    0.48                23
 01/19/2021   20:19:03   ( -78.87,  27.45) 01/19/2021   20:18:51  ( -78.88,  27.60)    3.29                12
 01/19/2021   21:09:48   (  78.86,-165.16) 01/19/2021   21:09:56  (  78.88,-165.18)    2.10                 8
 01/19/2021   22:00:32   ( -78.87,   2.08) 01/19/2021   22:00:52  ( -78.86,   1.96)    2.88                20
 01/19/2021   22:51:17   (  78.86, 169.47) 01/19/2021   22:51:56  (  78.89, 169.44)    3.75                39
 01/19/2021   23:42:01   ( -78.87, -23.29) 01/19/2021   23:42:52  ( -78.87, -23.43)    3.08                51
 01/20/2021   00:32:47   (  78.89, 143.85) 01/20/2021   00:33:57  (  78.87, 143.80)    2.69                70