Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 10 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)
 10/07/2021   16:03:27   ( -77.88,  98.65) 10/07/2021   16:02:20  ( -77.88,  95.47)   74.15                67
 10/07/2021   16:54:20   (  78.19, -95.65) 10/07/2021   16:53:17  (  78.17, -95.58)    2.16                63
 10/07/2021   17:45:03   ( -78.17,  71.78) 10/07/2021   17:44:12  ( -78.19,  71.78)    2.61                51
 10/07/2021   18:35:49   (  78.19,-121.04) 10/07/2021   18:35:17  (  78.18,-121.03)    0.92                32
 10/07/2021   19:26:32   ( -78.17,  46.39) 10/07/2021   19:26:12  ( -78.20,  46.34)    3.40                20
 10/07/2021   20:17:18   (  78.19,-146.43) 10/07/2021   20:17:17  (  78.19,-146.47)    1.02                 1
 10/07/2021   21:08:02   ( -78.21,  20.79) 10/07/2021   21:08:12  ( -78.21,  20.89)    2.44                10
 10/07/2021   21:58:47   (  78.20,-171.82) 10/07/2021   21:59:17  (  78.20,-171.92)    2.28                30
 10/07/2021   22:49:31   ( -78.21,  -4.60) 10/07/2021   22:50:12  ( -78.21,  -4.56)    1.04                41
 10/07/2021   23:40:16   (  78.20, 162.79) 10/07/2021   23:41:17  (  78.21, 162.63)    3.66                61
 10/08/2021   00:31:00   ( -78.22, -29.99) 10/08/2021   00:32:12  ( -78.22, -30.00)    0.48                72