Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 12 30.  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)
 01/02/2022   05:30:37   ( -77.92,-102.67) 01/02/2022   05:29:26  ( -77.96,-102.69)    3.94                71
 01/02/2022   06:21:23   (  77.94,  64.56) 01/02/2022   06:20:24  (  77.95,  64.54)    1.78                59
 01/02/2022   07:12:09   ( -77.94,-128.16) 01/02/2022   07:11:26  ( -77.96,-128.16)    2.21                43
 01/02/2022   08:02:55   (  77.96,  39.08) 01/02/2022   08:02:24  (  77.96,  39.07)    0.07                31
 01/02/2022   08:53:41   ( -77.96,-153.64) 01/02/2022   08:53:26  ( -77.97,-153.63)    0.58                15
 01/02/2022   09:44:27   (  77.98,  13.59) 01/02/2022   09:44:24  (  77.96,  13.61)    1.67                 3
 01/02/2022   10:35:13   ( -77.98,-179.13) 01/02/2022   10:35:26  ( -77.97,-179.10)    1.38                13
 01/02/2022   11:25:59   (  78.00, -11.90) 01/02/2022   11:26:24  (  77.97, -11.86)    3.40                25
 01/02/2022   12:16:45   ( -78.00, 155.38) 01/02/2022   12:17:26  ( -77.98, 155.43)    3.09                41
 01/02/2022   13:07:30   (  77.98, -37.18) 01/02/2022   13:08:24  (  77.97, -37.32)    3.42                54
 01/02/2022   13:58:16   ( -77.98, 130.11) 01/02/2022   13:59:26  ( -77.98, 129.96)    3.34                70
 01/02/2022   14:49:10   (  78.31, -64.40) 01/02/2022   14:50:16  (  78.28, -61.00)   76.75                66