Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 7 22.  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)
 07/30/2021   21:17:44   ( -78.36,  17.04) 07/30/2021   21:16:38  ( -78.35,  17.00)    1.54                66
 07/30/2021   22:08:28   (  78.35,-175.59) 07/30/2021   22:07:32  (  78.35,-175.72)    3.03                56
 07/30/2021   22:59:13   ( -78.36,  -8.34) 07/30/2021   22:58:38  ( -78.36,  -8.43)    2.09                35
 07/30/2021   23:49:58   (  78.39, 158.80) 07/30/2021   23:49:32  (  78.36, 158.85)    3.69                26
 07/31/2021   00:40:42   ( -78.36, -33.73) 07/31/2021   00:40:38  ( -78.37, -33.87)    3.18                 4
 07/31/2021   01:31:27   (  78.39, 133.42) 07/31/2021   01:31:32  (  78.37, 133.41)    2.74                 5
 07/31/2021   02:22:12   ( -78.40, -59.33) 07/31/2021   02:22:38  ( -78.38, -59.30)    3.04                26
 07/31/2021   03:12:56   (  78.40, 108.03) 07/31/2021   03:13:32  (  78.38, 107.98)    2.25                36
 07/31/2021   04:03:41   ( -78.41, -84.72) 07/31/2021   04:04:38  ( -78.39, -84.73)    2.10                57
 07/31/2021   04:54:25   (  78.40,  82.65) 07/31/2021   04:55:32  (  78.39,  82.55)    2.50                67