Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 11 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/25/2021   10:11:52   (   0.04,-128.30) (  -0.23,-126.95)  153.18                80
 11/26/2021   22:31:45   (  -0.01,-128.27) (  -0.95,-132.39)  470.22                80
 11/27/2021   22:16:04   (  -0.02,-128.25) (   0.03,-127.95)   34.17                80
 11/30/2021   10:17:27   (   0.01,-128.19) (   0.18,-128.91)   82.36                80
 12/01/2021   10:01:46   (   0.03,-128.17) (  -0.82,-124.48)  421.17                80
 12/02/2021   22:21:40   (  -0.00,-128.13) (  -0.39,-129.92)  204.23                80
 12/03/2021   22:06:00   (  -0.02,-128.10) (   0.58,-125.48)  298.73                80
 12/05/2021   10:25:45   (  -0.01,-128.05) (   0.61,-130.89)  323.73                80
 12/06/2021   10:10:05   (   0.01,-128.01) (  -0.34,-126.45)  178.38                80
 12/07/2021   22:30:00   (   0.02,-127.96) (  -0.89,-131.90)  449.27                80