Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 11 12.  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   00:02:11   (  78.06, 158.36) 11/18/2021   00:00:57  (  78.06, 158.38)    0.53                74
 11/18/2021   00:52:56   ( -78.08, -34.44) 11/18/2021   00:52:01  ( -78.06, -34.40)    2.59                55
 11/18/2021   01:43:40   (  78.07, 132.96) 11/18/2021   01:42:57  (  78.07, 132.92)    0.99                43
 11/18/2021   02:34:25   ( -78.09, -59.83) 11/18/2021   02:34:01  ( -78.07, -59.85)    2.17                24
 11/18/2021   03:25:09   (  78.07, 107.57) 11/18/2021   03:24:57  (  78.07, 107.47)    2.47                12
 11/18/2021   04:15:54   ( -78.09, -85.22) 11/18/2021   04:16:01  ( -78.07, -85.31)    2.62                 7
 11/18/2021   05:06:39   (  78.11,  81.96) 11/18/2021   05:06:57  (  78.08,  82.01)    3.80                18
 11/18/2021   05:57:23   ( -78.09,-110.62) 11/18/2021   05:58:00  ( -78.12,-110.54)    3.19                37
 11/18/2021   06:48:08   (  78.12,  56.57) 11/18/2021   06:48:57  (  78.09,  56.55)    3.43                49
 11/18/2021   07:38:52   ( -78.10,-136.01) 11/18/2021   07:40:00  ( -78.13,-135.99)    2.98                68
 11/18/2021   08:29:43   (  78.36,  29.85) 11/18/2021   08:30:51  (  78.32,  32.45)   58.73                68