Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 2 8.  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, -70.16) 02/16/2021   02:51:32  ( -78.73, -70.54)    8.78                75
 02/16/2021   03:43:33   (  78.80,  96.90) 02/16/2021   03:42:32  (  78.77,  96.98)    3.54                61
 02/16/2021   04:34:17   ( -78.80, -95.77) 02/16/2021   04:33:31  ( -78.78, -95.68)    2.66                46
 02/16/2021   05:25:02   (  78.80,  71.53) 02/16/2021   05:24:32  (  78.79,  71.59)    2.02                30
 02/16/2021   06:15:46   ( -78.80,-121.15) 02/16/2021   06:15:31  ( -78.80,-121.07)    1.59                15
 02/16/2021   07:06:31   (  78.80,  46.16) 02/16/2021   07:06:32  (  78.80,  46.19)    0.84                 1
 02/16/2021   07:57:15   ( -78.80,-146.52) 02/16/2021   07:57:31  ( -78.81,-146.46)    1.81                16
 02/16/2021   08:48:00   (  78.80,  20.78) 02/16/2021   08:48:32  (  78.81,  20.80)    1.52                32
 02/16/2021   09:38:44   ( -78.80,-171.89) 02/16/2021   09:39:31  ( -78.83,-171.85)    3.06                47
 02/16/2021   10:29:29   (  78.80,  -4.59) 02/16/2021   10:30:32  (  78.83,  -4.59)    2.97                63
 02/16/2021   11:20:18   ( -78.98, 161.51) 02/16/2021   11:21:28  ( -78.94, 163.52)   42.88                70