Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 8 8.  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, 110.12) 08/13/2021   15:05:26  ( -78.30, 110.05)    2.75                72
 08/13/2021   15:57:22   (  78.31, -82.47) 08/13/2021   15:56:20  (  78.34, -82.43)    3.87                62
 08/13/2021   16:48:07   ( -78.33,  84.73) 08/13/2021   16:47:26  ( -78.31,  84.62)    3.05                41
 08/13/2021   17:38:52   (  78.35,-108.08) 08/13/2021   17:38:21  (  78.31,-108.10)    3.81                31
 08/13/2021   18:29:36   ( -78.33,  59.35) 08/13/2021   18:29:25  ( -78.36,  59.41)    3.51                11
 08/13/2021   19:20:21   (  78.35,-133.46) 08/13/2021   19:20:21  (  78.32,-133.54)    3.40                 0
 08/13/2021   20:11:05   ( -78.33,  33.96) 08/13/2021   20:11:25  ( -78.37,  33.97)    3.97                20
 08/13/2021   21:01:50   (  78.35,-158.85) 08/13/2021   21:02:20  (  78.37,-158.74)    3.07                30
 08/13/2021   21:52:35   ( -78.37,   8.35) 08/13/2021   21:53:26  ( -78.34,   8.30)    3.75                51
 08/13/2021   22:43:19   (  78.36, 175.77) 08/13/2021   22:44:20  (  78.38, 175.83)    2.96                61
 08/13/2021   23:34:13   ( -78.72, -19.11) 08/13/2021   23:35:17  ( -78.67, -14.99)   89.96                64