Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 7 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)
 07/17/2021   09:53:08   (  -0.07,-127.75) (  -1.03,-123.43)  491.84                80
 07/18/2021   22:12:05   (   0.09,-127.61) (  -0.14,-128.65)  118.28                80
 07/19/2021   21:55:46   (   0.08,-127.57) (   0.86,-124.05)  400.56                80
 07/21/2021   10:14:33   (  -0.10,-127.58) (   0.29,-129.22)  187.90                80
 07/22/2021   09:58:16   (  -0.10,-127.54) (  -0.76,-124.64)  330.42                80
 07/23/2021   22:17:11   (   0.12,-127.38) (  -0.45,-129.84)  281.02                80
 07/24/2021   22:00:54   (   0.11,-127.33) (   0.61,-125.26)  237.37                80
 07/26/2021   10:19:41   (  -0.13,-127.35) (   0.55,-130.43)  351.32                80
 07/27/2021   10:03:23   (  -0.12,-127.30) (  -0.44,-125.83)  167.06                80
 07/28/2021   22:22:18   (   0.14,-127.14) (  -0.76,-131.04)  444.31                80
 07/29/2021   22:06:00   (   0.13,-127.09) (   0.30,-126.45)   74.06                80