Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 7 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/16/2021   10:09:26   (  -0.07,-127.79) (  -0.00,-128.03)   27.59                80
 07/17/2021   09:53:09   (  -0.06,-127.75) (  -1.05,-123.44)  491.63                80
 07/18/2021   22:12:04   (   0.09,-127.60) (  -0.17,-128.64)  118.58                80
 07/19/2021   21:55:47   (   0.08,-127.56) (   0.88,-124.06)  400.19                80
 07/21/2021   10:14:34   (  -0.10,-127.58) (   0.27,-129.23)  188.48                80
 07/22/2021   09:58:15   (  -0.09,-127.53) (  -0.72,-124.63)  329.74                80
 07/23/2021   22:17:12   (   0.12,-127.37) (  -0.43,-129.85)  281.74                80
 07/24/2021   22:00:53   (   0.11,-127.33) (   0.57,-125.25)  236.53                80
 07/26/2021   10:19:41   (  -0.13,-127.34) (   0.60,-130.42)  352.43                80
 07/27/2021   10:03:23   (  -0.12,-127.29) (  -0.46,-125.84)  165.88                80