Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 11 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/22/2021   22:07:52   (  -0.06,-128.35) (   0.47,-126.00)  267.91                80
 11/24/2021   10:27:34   (   0.03,-128.32) (   0.73,-131.40)  351.39                80
 11/25/2021   10:11:52   (   0.04,-128.30) (  -0.27,-126.96)  153.16                80
 11/26/2021   22:31:45   (  -0.01,-128.27) (  -0.97,-132.39)  470.55                80
 11/27/2021   22:16:04   (  -0.02,-128.25) (   0.06,-127.96)   33.84                80
 11/30/2021   10:17:26   (   0.01,-128.19) (   0.20,-128.91)   82.67                80
 12/01/2021   10:01:46   (   0.03,-128.16) (  -0.80,-124.47)  420.87                80
 12/02/2021   22:21:40   (  -0.00,-128.12) (  -0.42,-129.92)  204.84                80
 12/03/2021   22:05:59   (  -0.02,-128.09) (   0.56,-125.48)  298.08                80
 12/05/2021   10:25:45   (  -0.01,-128.04) (   0.63,-130.89)  324.21                80
 12/06/2021   10:10:04   (   0.01,-128.01) (  -0.32,-126.44)  177.88                80