Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 8 16.  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   08:55:24   ( -77.99,-155.16) 08/27/2021   08:54:18  ( -78.00,-158.45)   76.11                66
 08/27/2021   09:46:16   (  78.28,  10.58) 08/27/2021   09:45:08  (  78.29,  10.57)    1.38                68
 08/27/2021   10:37:01   ( -78.30, 177.73) 08/27/2021   10:36:10  ( -78.30, 177.90)    3.97                51
 08/27/2021   11:27:45   (  78.28, -14.81) 08/27/2021   11:27:08  (  78.30, -14.87)    2.51                37
 08/27/2021   12:18:30   ( -78.31, 152.34) 08/27/2021   12:18:10  ( -78.31, 152.46)    2.77                20
 08/27/2021   13:09:15   (  78.32, -40.41) 08/27/2021   13:09:08  (  78.31, -40.30)    2.92                 7
 08/27/2021   13:59:59   ( -78.31, 126.96) 08/27/2021   14:00:10  ( -78.32, 127.02)    1.89                11
 08/27/2021   14:50:44   (  78.32, -65.80) 08/27/2021   14:51:08  (  78.32, -65.74)    1.56                24
 08/27/2021   15:41:28   ( -78.31, 101.57) 08/27/2021   15:42:10  ( -78.33, 101.58)    1.85                42
 08/27/2021   16:32:13   (  78.33, -91.19) 08/27/2021   16:33:08  (  78.33, -91.17)    0.30                55
 08/27/2021   17:22:57   ( -78.32,  76.18) 08/27/2021   17:24:10  ( -78.34,  76.14)    2.68                73