Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2023 12 18.  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)
 12/26/2023   17:22:43   ( -75.85,  95.86) 12/26/2023   17:21:35  ( -75.85,  93.22)   71.68                68
 12/26/2023   18:13:37   (  76.19, -98.03) 12/26/2023   18:12:23  (  76.16, -98.39)   10.27                74
 12/26/2023   19:04:23   ( -76.25,  69.07) 12/26/2023   19:03:25  ( -76.23,  69.11)    2.66                58
 12/26/2023   19:55:09   (  76.23,-123.55) 12/26/2023   19:54:20  (  76.23,-123.63)    2.19                49
 12/26/2023   20:45:54   ( -76.25,  43.71) 12/26/2023   20:45:23  ( -76.26,  43.71)    0.88                31
 12/26/2023   21:36:41   (  76.27,-149.07) 12/26/2023   21:36:18  (  76.25,-149.03)    2.28                23
 12/26/2023   22:27:26   ( -76.29,  18.19) 12/26/2023   22:27:21  ( -76.28,  18.30)    3.07                 5
 12/26/2023   23:18:12   (  76.27,-174.42) 12/26/2023   23:18:16  (  76.28,-174.44)    1.18                 4
 12/27/2023   00:08:57   ( -76.28,  -7.16) 12/27/2023   00:09:19  ( -76.30,  -7.10)    3.04                22
 12/27/2023   00:59:44   (  76.30, 160.05) 12/27/2023   01:00:14  (  76.30, 160.16)    2.87                30
 12/27/2023   01:50:28   ( -76.27, -32.52) 12/27/2023   01:51:18  ( -76.28, -32.67)    3.95                50
 12/27/2023   02:41:15   (  76.30, 134.70) 12/27/2023   02:42:12  (  76.32, 134.76)    3.03                57
 12/27/2023   03:32:01   ( -76.36, -58.21) 12/27/2023   03:33:15  ( -76.35, -57.90)    8.11                74
 12/27/2023   04:22:56   (  76.74, 107.63) 12/27/2023   04:24:02  (  76.69, 110.74)   79.67                66