Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 7 21.  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   ( -78.36,  17.04) 07/30/2021   21:16:39  ( -78.34,  16.94)    3.25                66
 07/30/2021   22:08:28   (  78.35,-175.59) 07/30/2021   22:07:31  (  78.37,-175.55)    2.77                57
 07/30/2021   22:59:13   ( -78.36,  -8.34) 07/30/2021   22:58:37  ( -78.38,  -8.26)    3.13                36
 07/30/2021   23:49:57   (  78.35, 159.02) 07/30/2021   23:49:31  (  78.38, 159.01)    3.46                26
 07/31/2021   00:40:42   ( -78.36, -33.73) 07/31/2021   00:40:37  ( -78.39, -33.69)    3.45                 5
 07/31/2021   01:31:27   (  78.39, 133.41) 07/31/2021   01:31:31  (  78.39, 133.58)    3.78                 4
 07/31/2021   02:22:12   ( -78.40, -59.34) 07/31/2021   02:22:38  ( -78.37, -59.36)    4.09                26
 07/31/2021   03:12:56   (  78.40, 108.03) 07/31/2021   03:13:31  (  78.40, 108.15)    2.84                35
 07/31/2021   04:03:41   ( -78.41, -84.72) 07/31/2021   04:04:38  ( -78.38, -84.79)    3.58                57
 07/31/2021   04:54:25   (  78.40,  82.64) 07/31/2021   04:55:31  (  78.41,  82.71)    2.33                66