Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 8 7.  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   ( -78.33, 110.11) 08/13/2021   15:05:26  ( -78.30, 110.03)    3.37                72
 08/13/2021   15:57:22   (  78.31, -82.48) 08/13/2021   15:56:20  (  78.34, -82.46)    3.03                62
 08/13/2021   16:48:07   ( -78.33,  84.72) 08/13/2021   16:47:25  ( -78.34,  84.83)    3.02                42
 08/13/2021   17:38:51   (  78.31,-107.87) 08/13/2021   17:38:20  (  78.35,-107.89)    3.80                31
 08/13/2021   18:29:36   ( -78.33,  59.33) 08/13/2021   18:29:25  ( -78.35,  59.39)    2.88                11
 08/13/2021   19:20:21   (  78.35,-133.48) 08/13/2021   19:20:20  (  78.36,-133.33)    3.39                 1
 08/13/2021   20:11:05   ( -78.33,  33.95) 08/13/2021   20:11:25  ( -78.36,  33.95)    3.34                20
 08/13/2021   21:01:50   (  78.36,-158.87) 08/13/2021   21:02:20  (  78.37,-158.76)    2.50                30
 08/13/2021   21:52:35   ( -78.38,   8.34) 08/13/2021   21:53:25  ( -78.37,   8.52)    3.96                50
 08/13/2021   22:43:19   (  78.36, 175.75) 08/13/2021   22:44:20  (  78.38, 175.80)    2.16                61
 08/13/2021   23:34:13   ( -78.72, -19.12) 08/13/2021   23:35:17  ( -78.66, -15.01)   89.80                64