Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 1 6.  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)
 01/06/2021   03:20:40   (  78.88, 101.89) 01/06/2021   03:20:35  (  78.89, 101.75)    3.18                 5
 01/06/2021   04:11:24   ( -78.90, -90.89) 01/06/2021   04:11:31  ( -78.91, -90.82)    2.49                 7
 01/06/2021   05:02:10   (  78.92,  76.27) 01/06/2021   05:02:35  (  78.91,  76.37)    2.33                25
 01/06/2021   05:52:53   ( -78.90,-116.26) 01/06/2021   05:53:31  ( -78.93,-116.21)    3.85                38
 01/06/2021   06:43:39   (  78.92,  50.90) 01/06/2021   06:44:35  (  78.92,  50.99)    1.94                56
 01/06/2021   07:34:23   ( -78.93,-141.87) 01/06/2021   07:35:32  ( -78.91,-141.85)    2.36                69
 01/19/2021   16:56:04   ( -78.86,  78.25) 01/19/2021   16:54:51  ( -78.83,  78.27)    2.86                73
 01/19/2021   17:46:49   (  78.85,-114.37) 01/19/2021   17:45:55  (  78.87,-114.25)    3.17                54
 01/19/2021   18:37:33   ( -78.86,  52.88) 01/19/2021   18:36:51  ( -78.85,  52.89)    1.20                42
 01/19/2021   19:28:18   (  78.85,-139.74) 01/19/2021   19:27:56  (  78.85,-139.89)    3.26                22
 01/19/2021   20:19:02   ( -78.86,  27.51) 01/19/2021   20:18:51  ( -78.86,  27.50)    0.48                11
 01/19/2021   21:09:48   (  78.89,-165.36) 01/19/2021   21:09:56  (  78.86,-165.28)    3.09                 8
 01/19/2021   22:00:31   ( -78.86,   2.14) 01/19/2021   22:00:51  ( -78.88,   2.11)    2.13                20
 01/19/2021   22:51:17   (  78.89, 169.27) 01/19/2021   22:51:56  (  78.88, 169.33)    1.64                39
 01/19/2021   23:42:00   ( -78.86, -23.23) 01/19/2021   23:42:51  ( -78.89, -23.27)    3.78                51
 01/20/2021   00:32:46   (  78.89, 143.90) 01/20/2021   00:33:56  (  78.89, 143.95)    1.16                70