Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 7 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)
 07/22/2021   09:58:15   (  -0.10,-127.54) (  -0.72,-124.63)  330.70                80
 07/23/2021   22:17:12   (   0.12,-127.38) (  -0.43,-129.84)  280.69                80
 07/24/2021   22:00:53   (   0.11,-127.33) (   0.57,-125.25)  237.74                80
 07/26/2021   10:19:41   (  -0.13,-127.35) (   0.53,-130.43)  350.80                80
 07/27/2021   10:03:23   (  -0.12,-127.30) (  -0.47,-125.84)  167.61                80
 07/28/2021   22:22:18   (   0.14,-127.15) (  -0.73,-131.04)  443.78                80
 07/29/2021   22:06:00   (   0.14,-127.10) (   0.27,-126.44)   74.61                80
 08/01/2021   10:08:30   (  -0.15,-127.06) (  -0.16,-127.03)    3.75                80
 08/03/2021   22:08:26   (   0.16,-126.84) (  -0.03,-127.64)   90.97                80
 08/04/2021   21:52:08   (   0.15,-126.79) (   0.97,-123.04)  426.48                80