Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 7 30.  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   21:17:45   ( -78.37,  16.97) 07/30/2021   21:16:38  ( -78.37,  17.15)    4.05                67
 07/30/2021   22:08:29   (  78.36,-175.63) 07/30/2021   22:07:32  (  78.38,-175.54)    2.89                57
 07/30/2021   22:59:14   ( -78.38,  -8.42) 07/30/2021   22:58:38  ( -78.38,  -8.29)    3.02                36
 07/30/2021   23:49:58   (  78.36, 158.99) 07/30/2021   23:49:32  (  78.39, 159.03)    3.11                26
 07/31/2021   00:40:43   ( -78.38, -33.80) 07/31/2021   00:40:38  ( -78.39, -33.72)    2.37                 5
 07/31/2021   01:31:27   (  78.36, 133.60) 07/31/2021   01:31:32  (  78.40, 133.60)    3.83                 5
 07/31/2021   02:22:12   ( -78.38, -59.19) 07/31/2021   02:22:38  ( -78.40, -59.15)    2.41                26
 07/31/2021   03:12:57   (  78.40, 107.99) 07/31/2021   03:13:32  (  78.41, 108.16)    3.81                35
 07/31/2021   04:03:40   ( -78.38, -84.57) 07/31/2021   04:04:37  ( -78.41, -84.58)    3.11                57
 07/31/2021   04:54:25   (  78.41,  82.61) 07/31/2021   04:55:31  (  78.42,  82.73)    2.99                66