Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 2 18.  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)
 03/01/2021   20:41:53   ( -78.74,  22.78) 03/01/2021   20:40:50  ( -78.73,  22.65)    2.88                63
 03/01/2021   21:32:38   (  78.76,-170.03) 03/01/2021   21:31:47  (  78.75,-169.97)    1.83                51
 03/01/2021   22:23:22   ( -78.74,  -2.60) 03/01/2021   22:22:50  ( -78.74,  -2.74)    3.15                32
 03/01/2021   23:14:07   (  78.76, 164.60) 03/01/2021   23:13:47  (  78.76, 164.63)    0.76                20
 03/02/2021   00:04:52   ( -78.78, -28.21) 03/02/2021   00:04:50  ( -78.76, -28.13)    2.58                 2
 03/02/2021   00:55:36   (  78.76, 139.22) 03/02/2021   00:55:47  (  78.77, 139.24)    1.69                11
 03/02/2021   01:46:21   ( -78.78, -53.58) 03/02/2021   01:46:50  ( -78.77, -53.53)    1.28                29
 03/02/2021   02:37:05   (  78.76, 113.85) 03/02/2021   02:37:47  (  78.79, 113.84)    3.17                42
 03/02/2021   03:27:50   ( -78.78, -78.95) 03/02/2021   03:28:50  ( -78.79, -78.92)    1.39                60
 03/02/2021   04:18:35   (  78.80,  88.24) 03/02/2021   04:19:48  (  78.77,  88.20)    3.33                73