Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 10 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)
 10/07/2021   16:03:27   ( -77.88,  98.65) 10/07/2021   16:02:20  ( -77.89,  95.50)   73.55                67
 10/07/2021   16:54:20   (  78.18, -95.63) 10/07/2021   16:53:17  (  78.18, -95.53)    2.21                63
 10/07/2021   17:45:03   ( -78.16,  71.78) 10/07/2021   17:44:12  ( -78.19,  71.81)    3.33                51
 10/07/2021   18:35:49   (  78.19,-121.02) 10/07/2021   18:35:17  (  78.19,-120.98)    1.05                32
 10/07/2021   19:26:32   ( -78.17,  46.39) 10/07/2021   19:26:12  ( -78.20,  46.37)    3.87                20
 10/07/2021   20:17:18   (  78.19,-146.41) 10/07/2021   20:17:17  (  78.20,-146.43)    1.14                 1
 10/07/2021   21:08:02   ( -78.21,  20.79) 10/07/2021   21:08:12  ( -78.21,  20.92)    2.97                10
 10/07/2021   21:58:47   (  78.19,-171.80) 10/07/2021   21:59:17  (  78.21,-171.87)    2.33                30
 10/07/2021   22:49:31   ( -78.21,  -4.60) 10/07/2021   22:50:12  ( -78.22,  -4.53)    1.75                41
 10/07/2021   23:40:17   (  78.24, 162.59) 10/07/2021   23:41:17  (  78.22, 162.68)    3.00                60
 10/08/2021   00:31:00   ( -78.22, -29.99) 10/08/2021   00:32:12  ( -78.23, -29.97)    1.14                72