Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 8 1.  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   ( -78.31, 110.20) 08/13/2021   15:05:26  ( -78.32, 110.13)    1.69                72
 08/13/2021   15:57:23   (  78.33, -82.63) 08/13/2021   15:56:21  (  78.31, -82.61)    2.53                62
 08/13/2021   16:48:07   ( -78.31,  84.82) 08/13/2021   16:47:26  ( -78.33,  84.70)    3.07                41
 08/13/2021   17:38:52   (  78.34,-108.02) 08/13/2021   17:38:21  (  78.32,-108.05)    1.76                31
 08/13/2021   18:29:37   ( -78.35,  59.21) 08/13/2021   18:29:26  ( -78.33,  59.26)    2.31                11
 08/13/2021   19:20:21   (  78.34,-133.40) 08/13/2021   19:20:21  (  78.33,-133.48)    1.88                 0
 08/13/2021   20:11:06   ( -78.36,  33.82) 08/13/2021   20:11:26  ( -78.34,  33.83)    1.20                20
 08/13/2021   21:01:50   (  78.34,-158.79) 08/13/2021   21:02:21  (  78.34,-158.91)    2.77                31
 08/13/2021   21:52:35   ( -78.36,   8.44) 08/13/2021   21:53:26  ( -78.35,   8.39)    1.16                51
 08/13/2021   22:43:20   (  78.38, 175.60) 08/13/2021   22:44:21  (  78.35, 175.65)    3.71                61
 08/13/2021   23:34:13   ( -78.70, -19.02) 08/13/2021   23:35:18  ( -78.65, -15.14)   84.81                65