Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 11 7.  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)
 11/18/2021   00:02:12   (  78.03, 158.54) 11/18/2021   00:00:58  (  78.01, 158.10)   10.12                74
 11/18/2021   00:52:58   ( -78.08, -34.47) 11/18/2021   00:52:01  ( -78.05, -34.44)    3.73                57
 11/18/2021   01:43:42   (  78.07, 132.93) 11/18/2021   01:42:57  (  78.06, 132.86)    2.06                45
 11/18/2021   02:34:27   ( -78.09, -59.85) 11/18/2021   02:34:01  ( -78.06, -59.89)    3.38                26
 11/18/2021   03:25:11   (  78.07, 107.54) 11/18/2021   03:24:57  (  78.06, 107.41)    3.34                14
 11/18/2021   04:15:56   ( -78.09, -85.24) 11/18/2021   04:16:00  ( -78.10, -85.13)    2.98                 4
 11/18/2021   05:06:40   (  78.08,  82.15) 11/18/2021   05:06:56  (  78.11,  82.17)    3.51                16
 11/18/2021   05:57:25   ( -78.10,-110.63) 11/18/2021   05:58:00  ( -78.11,-110.58)    2.03                35
 11/18/2021   06:48:10   (  78.12,  56.55) 11/18/2021   06:48:56  (  78.11,  56.71)    3.75                46
 11/18/2021   07:38:54   ( -78.10,-136.02) 11/18/2021   07:40:00  ( -78.12,-136.04)    2.07                66
 11/18/2021   08:29:42   (  78.24,  30.50) 11/18/2021   08:30:53  (  78.23,  31.93)   32.33                71