Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 2 15.  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   02:52:47   ( -78.76, -70.18) 02/16/2021   02:51:32  ( -78.73, -70.54)    8.39                75
 02/16/2021   03:43:33   (  78.80,  96.91) 02/16/2021   03:42:32  (  78.78,  97.02)    3.22                61
 02/16/2021   04:34:17   ( -78.80, -95.79) 02/16/2021   04:33:31  ( -78.78, -95.68)    3.11                46
 02/16/2021   05:25:02   (  78.80,  71.54) 02/16/2021   05:24:32  (  78.79,  71.63)    1.99                30
 02/16/2021   06:15:46   ( -78.80,-121.16) 02/16/2021   06:15:31  ( -78.80,-121.07)    2.09                15
 02/16/2021   07:06:31   (  78.80,  46.17) 02/16/2021   07:06:32  (  78.80,  46.23)    1.60                 1
 02/16/2021   07:57:15   ( -78.80,-146.54) 02/16/2021   07:57:31  ( -78.81,-146.46)    2.10                16
 02/16/2021   08:48:00   (  78.80,  20.79) 02/16/2021   08:48:32  (  78.82,  20.84)    2.48                32
 02/16/2021   09:38:44   ( -78.80,-171.91) 02/16/2021   09:39:31  ( -78.83,-171.85)    3.13                47
 02/16/2021   10:29:29   (  78.80,  -4.58) 02/16/2021   10:30:32  (  78.83,  -4.55)    3.84                63