Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 2 20.  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)
 03/01/2021   19:51:00   (  78.42,-142.61) 03/01/2021   19:49:56  (  78.44,-146.61)   89.35                64
 03/01/2021   20:41:53   ( -78.75,  22.71) 03/01/2021   20:40:50  ( -78.75,  22.79)    1.78                63
 03/01/2021   21:32:37   (  78.77,-170.08) 03/01/2021   21:31:47  (  78.73,-170.07)    3.73                50
 03/01/2021   22:23:21   ( -78.75,  -2.66) 03/01/2021   22:22:49  ( -78.76,  -2.60)    2.03                32
 03/01/2021   23:14:06   (  78.77, 164.55) 03/01/2021   23:13:47  (  78.75, 164.53)    2.24                19
 03/02/2021   00:04:50   ( -78.75, -28.04) 03/02/2021   00:04:49  ( -78.78, -27.99)    3.19                 1
 03/02/2021   00:55:35   (  78.77, 139.17) 03/02/2021   00:55:47  (  78.76, 139.14)    1.03                12
 03/02/2021   01:46:20   ( -78.79, -53.65) 03/02/2021   01:46:50  ( -78.76, -53.63)    3.27                30
 03/02/2021   02:37:04   (  78.77, 113.80) 03/02/2021   02:37:47  (  78.77, 113.74)    1.39                43
 03/02/2021   03:27:49   ( -78.79, -79.03) 03/02/2021   03:28:50  ( -78.77, -79.02)    1.68                61
 03/02/2021   04:18:33   (  78.77,  88.42) 03/02/2021   04:19:47  (  78.79,  88.35)    2.75                74