Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 9 25.  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   ( -77.84,  98.85) 10/07/2021   16:02:22  ( -77.83,  95.22)   85.16                65
 10/07/2021   16:54:21   (  78.19, -95.69) 10/07/2021   16:53:18  (  78.16, -95.65)    3.81                63
 10/07/2021   17:45:03   ( -78.17,  71.78) 10/07/2021   17:44:12  ( -78.18,  71.74)    1.82                51
 10/07/2021   18:35:49   (  78.20,-121.08) 10/07/2021   18:35:17  (  78.17,-121.10)    3.21                32
 10/07/2021   19:26:32   ( -78.17,  46.39) 10/07/2021   19:26:12  ( -78.19,  46.29)    3.08                20
 10/07/2021   20:17:18   (  78.20,-146.47) 10/07/2021   20:17:17  (  78.18,-146.55)    3.19                 1
 10/07/2021   21:08:02   ( -78.21,  20.78) 10/07/2021   21:08:12  ( -78.20,  20.84)    2.20                10
 10/07/2021   21:58:47   (  78.20,-171.86) 10/07/2021   21:59:16  (  78.22,-171.77)    2.87                29
 10/07/2021   22:49:31   ( -78.22,  -4.61) 10/07/2021   22:50:12  ( -78.21,  -4.60)    1.17                41
 10/07/2021   23:40:16   (  78.21, 162.75) 10/07/2021   23:41:16  (  78.23, 162.78)    2.61                60
 10/08/2021   00:31:00   ( -78.22, -30.00) 10/08/2021   00:32:12  ( -78.21, -30.05)    1.36                72