Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 7 31.  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)
 07/31/2021   04:54:26   (  78.41,  82.56) 07/31/2021   04:55:32  (  78.41,  82.68)    2.72                66
 08/13/2021   15:06:38   ( -78.31, 110.19) 08/13/2021   15:05:26  ( -78.30, 110.06)    3.07                72
 08/13/2021   15:57:22   (  78.30, -82.43) 08/13/2021   15:56:20  (  78.34, -82.46)    4.19                62
 08/13/2021   16:48:07   ( -78.31,  84.80) 08/13/2021   16:47:25  ( -78.35,  84.85)    4.07                42
 08/13/2021   17:38:52   (  78.34,-108.04) 08/13/2021   17:38:20  (  78.35,-107.90)    3.21                32
 08/13/2021   18:29:37   ( -78.36,  59.19) 08/13/2021   18:29:26  ( -78.32,  59.18)    3.64                11
 08/13/2021   19:20:21   (  78.34,-133.42) 08/13/2021   19:20:20  (  78.36,-133.33)    2.49                 1
 08/13/2021   20:11:06   ( -78.36,  33.81) 08/13/2021   20:11:26  ( -78.33,  33.74)    3.19                20
 08/13/2021   21:01:50   (  78.35,-158.81) 08/13/2021   21:02:20  (  78.37,-158.77)    2.42                30
 08/13/2021   21:52:35   ( -78.36,   8.42) 08/13/2021   21:53:25  ( -78.38,   8.54)    3.26                50
 08/13/2021   22:43:19   (  78.35, 175.81) 08/13/2021   22:44:20  (  78.38, 175.80)    3.03                61
 08/13/2021   23:34:13   ( -78.70, -19.03) 08/13/2021   23:35:18  ( -78.63, -15.23)   83.44                65