Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 9 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/19/2023   21:19:54   (   0.02,-104.68) (  -0.53,-107.19)  285.56                80
 09/20/2023   21:04:10   (   0.00,-104.68) (   0.47,-102.73)  223.26                80
 09/22/2023   09:26:27   (   0.00,-104.71) (   0.80,-108.08)  385.06                80
 09/23/2023   09:05:24   (  -0.00,-104.70) (  -0.26,-103.63)  122.76                80
 09/24/2023   21:27:51   (   0.01,-104.66) (  -0.95,-109.03)  498.15                80
 09/25/2023   21:12:07   (   0.02,-104.66) (   0.05,-104.57)   10.04                80
 09/28/2023   09:16:00   (  -0.01,-104.69) (   0.14,-105.48)   89.59                80
 09/29/2023   08:54:56   (  -0.01,-104.69) (  -0.87,-101.02)  418.94                80
 09/30/2023   21:17:22   (   0.00,-104.65) (  -0.38,-106.41)  200.89                80
 10/01/2023   21:01:37   (  -0.00,-104.65) (   0.58,-101.94)  307.93                80