Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 4 2.  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)
 04/11/2021   23:36:42   (  78.40, 161.32) 04/11/2021   23:35:35  (  78.39, 158.27)   68.19                67
 04/12/2021   00:27:33   ( -78.65, -32.85) 04/12/2021   00:26:32  ( -78.65, -32.70)    3.26                61
 04/12/2021   01:18:17   (  78.63, 134.56) 04/12/2021   01:17:28  (  78.65, 134.54)    1.88                49
 04/12/2021   02:09:02   ( -78.65, -58.22) 04/12/2021   02:08:32  ( -78.67, -58.10)    3.28                30
 04/12/2021   02:59:46   (  78.63, 109.19) 04/12/2021   02:59:28  (  78.66, 109.14)    3.39                18
 04/12/2021   03:50:31   ( -78.65, -83.60) 04/12/2021   03:50:33  ( -78.64, -83.75)    3.35                 2
 04/12/2021   04:41:16   (  78.67,  83.57) 04/12/2021   04:41:28  (  78.68,  83.74)    3.67                12
 04/12/2021   05:32:01   ( -78.69,-109.21) 04/12/2021   05:32:33  ( -78.66,-109.15)    3.47                32
 04/12/2021   06:22:45   (  78.67,  58.20) 04/12/2021   06:23:29  (  78.66,  58.10)    2.94                44
 04/12/2021   07:13:30   ( -78.69,-134.59) 04/12/2021   07:14:33  ( -78.67,-134.56)    1.98                63
 04/12/2021   08:04:13   (  78.67,  32.82) 04/12/2021   08:05:28  (  78.67,  32.70)    2.78                75