Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 11 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/19/2021   10:18:02   (   0.06,-128.40) (   0.24,-129.12)   82.98                80
 11/20/2021   10:01:44   (   0.08,-128.38) (  -0.79,-124.53)  439.67                80
 11/21/2021   22:20:39   (  -0.05,-128.36) (  -0.36,-129.73)  156.52                80
 11/22/2021   22:04:21   (  -0.06,-128.35) (   0.68,-125.14)  365.84                80
 11/24/2021   10:23:07   (   0.03,-128.32) (   0.46,-130.31)  226.44                80
 11/25/2021   10:06:48   (   0.05,-128.30) (  -0.52,-125.71)  295.47                80
 11/26/2021   22:25:43   (  -0.02,-128.27) (  -0.62,-130.92)  301.81                80
 11/27/2021   22:09:25   (  -0.03,-128.25) (   0.43,-126.32)  220.03                80
 11/29/2021   10:28:11   (   0.00,-128.22) (   0.73,-131.49)  372.70                80
 11/30/2021   10:11:51   (   0.02,-128.20) (  -0.25,-126.89)  148.78                80