Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 11 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/24/2021   10:27:34   (   0.03,-128.32) (   0.75,-131.39)  351.41                80
 11/25/2021   10:11:52   (   0.04,-128.30) (  -0.25,-126.95)  153.17                80
 11/26/2021   22:31:45   (  -0.01,-128.27) (  -0.93,-132.40)  470.36                80
 11/27/2021   22:16:04   (  -0.02,-128.25) (   0.05,-127.95)   33.96                80
 11/30/2021   10:17:27   (   0.01,-128.19) (   0.16,-128.92)   82.49                80
 12/01/2021   10:01:45   (   0.03,-128.17) (  -0.78,-124.47)  421.03                80
 12/02/2021   22:21:40   (  -0.00,-128.13) (  -0.43,-129.91)  204.55                80
 12/03/2021   22:06:00   (  -0.02,-128.10) (   0.60,-125.49)  298.43                80
 12/05/2021   10:25:45   (  -0.01,-128.05) (   0.65,-130.88)  323.98                80
 12/06/2021   10:10:05   (   0.01,-128.01) (  -0.36,-126.45)  178.11                80