Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 7 15.  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   10:09:27   (  -0.07,-127.79) (  -0.05,-128.04)   27.67                80
 07/17/2021   09:53:09   (  -0.06,-127.75) (  -1.04,-123.44)  491.66                80
 07/18/2021   22:12:05   (   0.09,-127.61) (  -0.12,-128.65)  118.55                80
 07/19/2021   21:55:46   (   0.08,-127.56) (   0.87,-124.05)  400.25                80
 07/21/2021   10:14:34   (  -0.10,-127.58) (   0.28,-129.23)  188.37                80
 07/22/2021   09:58:16   (  -0.09,-127.53) (  -0.77,-124.64)  329.88                80
 07/23/2021   22:17:11   (   0.12,-127.37) (  -0.44,-129.84)  281.59                80
 07/24/2021   22:00:53   (   0.11,-127.33) (   0.56,-125.25)  236.71                80
 07/26/2021   10:19:41   (  -0.13,-127.34) (   0.55,-130.43)  352.18                80
 07/27/2021   10:03:23   (  -0.12,-127.29) (  -0.44,-125.84)  166.12                80
 07/28/2021   22:22:18   (   0.14,-127.14) (  -0.75,-131.04)  445.24                80