Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 8 14.  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)
 08/27/2021   08:55:25   ( -78.01,-155.29) 08/27/2021   08:54:18  ( -78.01,-158.35)   70.66                67
 08/27/2021   09:46:17   (  78.30,  10.44) 08/27/2021   09:45:09  (  78.27,  10.44)    3.71                68
 08/27/2021   10:37:01   ( -78.29, 177.81) 08/27/2021   10:36:11  ( -78.28, 177.78)    1.08                50
 08/27/2021   11:27:46   (  78.30, -14.95) 08/27/2021   11:27:09  (  78.28, -15.00)    3.13                37
 08/27/2021   12:18:30   ( -78.29, 152.43) 08/27/2021   12:18:11  ( -78.29, 152.34)    1.98                19
 08/27/2021   13:09:15   (  78.31, -40.34) 08/27/2021   13:09:09  (  78.29, -40.43)    3.10                 6
 08/27/2021   13:59:59   ( -78.30, 127.04) 08/27/2021   14:00:11  ( -78.30, 126.90)    3.25                12
 08/27/2021   14:50:44   (  78.31, -65.72) 08/27/2021   14:51:08  (  78.33, -65.64)    3.21                24
 08/27/2021   15:41:29   ( -78.34, 101.43) 08/27/2021   15:42:11  ( -78.31, 101.46)    3.06                42
 08/27/2021   16:32:13   (  78.31, -91.11) 08/27/2021   16:33:08  (  78.34, -91.08)    3.46                55
 08/27/2021   17:22:58   ( -78.34,  76.05) 08/27/2021   17:24:11  ( -78.32,  76.02)    2.40                73