Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 2 14.  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)
 02/16/2021   02:52:46   ( -78.73, -69.97) 02/16/2021   02:51:32  ( -78.73, -70.57)   13.18                74
 02/16/2021   03:43:32   (  78.77,  97.12) 02/16/2021   03:42:32  (  78.77,  96.98)    3.14                60
 02/16/2021   04:34:16   ( -78.77, -95.58) 02/16/2021   04:33:31  ( -78.78, -95.72)    3.22                45
 02/16/2021   05:25:02   (  78.80,  71.51) 02/16/2021   05:24:32  (  78.78,  71.58)    2.60                30
 02/16/2021   06:15:46   ( -78.80,-121.19) 02/16/2021   06:15:31  ( -78.79,-121.10)    2.25                15
 02/16/2021   07:06:31   (  78.80,  46.13) 02/16/2021   07:06:32  (  78.80,  46.19)    1.33                 1
 02/16/2021   07:57:15   ( -78.80,-146.56) 02/16/2021   07:57:31  ( -78.81,-146.49)    1.45                16
 02/16/2021   08:48:00   (  78.80,  20.76) 02/16/2021   08:48:32  (  78.81,  20.80)    1.35                32
 02/16/2021   09:38:44   ( -78.81,-171.93) 02/16/2021   09:39:31  ( -78.82,-171.88)    2.12                47
 02/16/2021   10:29:29   (  78.80,  -4.61) 02/16/2021   10:30:32  (  78.83,  -4.60)    2.62                63