Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 10 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)
 10/07/2021   16:03:27   ( -77.88,  98.69) 10/07/2021   16:02:21  ( -77.85,  95.33)   78.63                66
 10/07/2021   16:54:20   (  78.18, -95.61) 10/07/2021   16:53:17  (  78.19, -95.51)    2.51                63
 10/07/2021   17:45:04   ( -78.20,  71.60) 10/07/2021   17:44:13  ( -78.16,  71.63)    3.88                51
 10/07/2021   18:35:49   (  78.18,-121.00) 10/07/2021   18:35:17  (  78.19,-120.95)    1.69                32
 10/07/2021   19:26:33   ( -78.20,  46.21) 10/07/2021   19:26:13  ( -78.17,  46.18)    3.39                20
 10/07/2021   20:17:18   (  78.19,-146.39) 10/07/2021   20:17:17  (  78.20,-146.40)    1.83                 1
 10/07/2021   21:08:02   ( -78.20,  20.82) 10/07/2021   21:08:12  ( -78.22,  20.96)    3.32                10
 10/07/2021   21:58:47   (  78.19,-171.78) 10/07/2021   21:59:17  (  78.21,-171.85)    2.79                30
 10/07/2021   22:49:31   ( -78.21,  -4.57) 10/07/2021   22:50:12  ( -78.22,  -4.49)    2.55                41
 10/07/2021   23:40:17   (  78.23, 162.61) 10/07/2021   23:41:17  (  78.22, 162.70)    2.63                60
 10/08/2021   00:31:00   ( -78.21, -29.96) 10/08/2021   00:32:12  ( -78.23, -29.94)    2.44                72