Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 9 28.  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)
 10/07/2021   16:03:27   ( -77.86,  98.77) 10/07/2021   16:02:21  ( -77.86,  95.35)   80.08                66
 10/07/2021   16:54:20   (  78.17, -95.55) 10/07/2021   16:53:17  (  78.19, -95.51)    2.17                63
 10/07/2021   17:45:04   ( -78.18,  71.69) 10/07/2021   17:44:13  ( -78.17,  71.65)    2.01                51
 10/07/2021   18:35:49   (  78.17,-120.94) 10/07/2021   18:35:17  (  78.19,-120.95)    2.46                32
 10/07/2021   19:26:33   ( -78.19,  46.30) 10/07/2021   19:26:13  ( -78.17,  46.20)    2.58                20
 10/07/2021   20:17:18   (  78.18,-146.33) 10/07/2021   20:17:17  (  78.20,-146.40)    3.39                 1
 10/07/2021   21:08:02   ( -78.19,  20.91) 10/07/2021   21:08:13  ( -78.18,  20.76)    3.66                11
 10/07/2021   21:58:48   (  78.22,-171.94) 10/07/2021   21:59:17  (  78.21,-171.85)    2.21                29
 10/07/2021   22:49:31   ( -78.19,  -4.48) 10/07/2021   22:50:12  ( -78.23,  -4.47)    3.99                41
 10/07/2021   23:40:17   (  78.22, 162.67) 10/07/2021   23:41:17  (  78.22, 162.71)    0.80                60
 10/08/2021   00:31:01   ( -78.23, -30.08) 10/08/2021   00:32:12  ( -78.24, -29.91)    3.88                71