Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 8 9.  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, 110.13) 08/13/2021   15:05:26  ( -78.30, 110.06)    2.48                72
 08/13/2021   15:57:23   (  78.34, -82.67) 08/13/2021   15:56:21  (  78.31, -82.65)    4.01                62
 08/13/2021   16:48:07   ( -78.32,  84.74) 08/13/2021   16:47:26  ( -78.31,  84.62)    2.92                41
 08/13/2021   17:38:52   (  78.34,-108.06) 08/13/2021   17:38:21  (  78.32,-108.09)    3.24                31
 08/13/2021   18:29:36   ( -78.33,  59.36) 08/13/2021   18:29:26  ( -78.32,  59.19)    3.83                10
 08/13/2021   19:20:21   (  78.35,-133.44) 08/13/2021   19:20:21  (  78.33,-133.52)    2.96                 0
 08/13/2021   20:11:06   ( -78.37,  33.75) 08/13/2021   20:11:26  ( -78.33,  33.75)    3.97                20
 08/13/2021   21:01:50   (  78.35,-158.83) 08/13/2021   21:02:21  (  78.34,-158.96)    3.26                31
 08/13/2021   21:52:35   ( -78.37,   8.36) 08/13/2021   21:53:26  ( -78.34,   8.31)    3.38                51
 08/13/2021   22:43:19   (  78.35, 175.78) 08/13/2021   22:44:20  (  78.38, 175.84)    3.49                61
 08/13/2021   23:34:13   ( -78.71, -19.10) 08/13/2021   23:35:17  ( -78.67, -14.98)   89.91                64