Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 8 6.  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   15:06:38   ( -78.32, 110.16) 08/13/2021   15:05:25  ( -78.33, 110.25)    2.85                73
 08/13/2021   15:57:22   (  78.30, -82.44) 08/13/2021   15:56:20  (  78.33, -82.48)    3.67                62
 08/13/2021   16:48:07   ( -78.32,  84.77) 08/13/2021   16:47:25  ( -78.34,  84.81)    2.81                42
 08/13/2021   17:38:52   (  78.34,-108.05) 08/13/2021   17:38:20  (  78.34,-107.91)    3.09                32
 08/13/2021   18:29:36   ( -78.32,  59.39) 08/13/2021   18:29:25  ( -78.35,  59.38)    3.39                11
 08/13/2021   19:20:21   (  78.35,-133.43) 08/13/2021   19:20:20  (  78.35,-133.35)    2.15                 1
 08/13/2021   20:11:06   ( -78.36,  33.78) 08/13/2021   20:11:25  ( -78.36,  33.94)    3.67                19
 08/13/2021   21:01:50   (  78.35,-158.82) 08/13/2021   21:02:20  (  78.36,-158.78)    1.87                30
 08/13/2021   21:52:35   ( -78.37,   8.39) 08/13/2021   21:53:25  ( -78.37,   8.50)    2.58                50
 08/13/2021   22:43:19   (  78.35, 175.79) 08/13/2021   22:44:20  (  78.37, 175.78)    2.46                61
 08/13/2021   23:34:12   ( -78.67, -18.83) 08/13/2021   23:35:18  ( -78.63, -15.27)   78.07                66