Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 10 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/05/2021   22:12:47   (  -0.30,-127.86) (  -0.35,-128.18)   36.43                80
 10/06/2021   21:56:29   (  -0.31,-127.89) (   0.66,-123.58)  491.12                80
 10/08/2021   10:15:16   (   0.29,-127.96) (   0.45,-128.76)   91.46                80
 10/09/2021   09:58:58   (   0.30,-127.99) (  -0.57,-124.17)  435.56                80
 10/10/2021   22:17:54   (  -0.27,-128.01) (  -0.56,-129.39)  156.03                80
 10/11/2021   22:01:36   (  -0.28,-128.04) (   0.46,-124.79)  370.47                80
 10/13/2021   10:20:22   (   0.25,-128.09) (   0.70,-129.96)  213.57                80
 10/14/2021   10:04:04   (   0.26,-128.12) (  -0.38,-125.38)  312.71                80
 10/15/2021   22:23:00   (  -0.23,-128.13) (  -0.80,-130.58)  279.68                80
 10/16/2021   22:06:41   (  -0.24,-128.16) (   0.22,-125.99)  246.71                80
 10/18/2021   10:25:29   (   0.21,-128.21) (   0.88,-131.17)  337.24                80