Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 8 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)
 08/13/2021   15:06:39   ( -78.33, 110.07) 08/13/2021   15:05:26  ( -78.33, 110.21)    3.23                73
 08/13/2021   15:57:23   (  78.32, -82.53) 08/13/2021   15:56:21  (  78.33, -82.53)    0.91                62
 08/13/2021   16:48:08   ( -78.33,  84.68) 08/13/2021   16:47:26  ( -78.34,  84.77)    2.03                42
 08/13/2021   17:38:52   (  78.32,-107.92) 08/13/2021   17:38:21  (  78.34,-107.96)    1.94                31
 08/13/2021   18:29:37   ( -78.34,  59.30) 08/13/2021   18:29:26  ( -78.35,  59.33)    1.26                11
 08/13/2021   19:20:21   (  78.32,-133.30) 08/13/2021   19:20:21  (  78.35,-133.40)    3.22                 0
 08/13/2021   20:11:06   ( -78.34,  33.91) 08/13/2021   20:11:26  ( -78.36,  33.90)    1.69                20
 08/13/2021   21:01:50   (  78.36,-158.91) 08/13/2021   21:02:20  (  78.36,-158.83)    2.15                30
 08/13/2021   21:52:34   ( -78.34,   8.52) 08/13/2021   21:53:25  ( -78.37,   8.46)    2.81                51
 08/13/2021   22:43:19   (  78.37, 175.70) 08/13/2021   22:44:20  (  78.37, 175.74)    0.84                61
 08/13/2021   23:34:12   ( -78.69, -18.93) 08/13/2021   23:35:17  ( -78.66, -15.07)   84.30                65