Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 6 5.  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)
 06/05/2021   21:11:12   (  78.31,-161.43) 06/05/2021   21:10:03  (  78.30,-163.75)   52.43                69
 06/05/2021   22:02:00   ( -78.48,   4.89) 06/05/2021   22:00:53  ( -78.51,   4.85)    3.27                67
 06/05/2021   22:52:46   (  78.50, 172.06) 06/05/2021   22:51:58  (  78.50, 172.00)    1.50                48
 06/05/2021   23:43:30   ( -78.52, -20.72) 06/05/2021   23:42:53  ( -78.52, -20.57)    3.39                37
 06/06/2021   00:34:15   (  78.50, 146.68) 06/06/2021   00:33:58  (  78.51, 146.58)    2.18                17
 06/06/2021   01:24:59   ( -78.52, -46.10) 06/06/2021   01:24:53  ( -78.53, -45.99)    2.88                 6
 06/06/2021   02:15:44   (  78.51, 121.30) 06/06/2021   02:15:58  (  78.52, 121.17)    3.31                14
 06/06/2021   03:06:27   ( -78.52, -71.49) 06/06/2021   03:06:52  ( -78.54, -71.40)    2.98                25
 06/06/2021   03:57:13   (  78.55,  95.68) 06/06/2021   03:57:57  (  78.53,  95.75)    2.11                44
 06/06/2021   04:47:56   ( -78.52, -96.87) 06/06/2021   04:48:52  ( -78.56, -96.82)    3.63                56
 06/06/2021   05:38:43   (  78.59,  70.07) 06/06/2021   05:39:57  (  78.54,  70.33)    7.41                74