Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 9 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)
 09/14/2021   22:11:20   (  -0.40,-128.03) (  -0.41,-127.97)    6.87                80
 09/17/2021   10:13:49   (   0.38,-128.01) (   0.50,-128.56)   62.61                80
 09/18/2021   09:57:31   (   0.39,-127.99) (  -0.51,-123.97)  457.90                80
 09/19/2021   22:16:26   (  -0.37,-127.89) (  -0.66,-129.18)  146.00                80
 09/20/2021   22:00:08   (  -0.38,-127.87) (   0.35,-124.58)  374.44                80
 09/22/2021   10:18:55   (   0.36,-127.87) (   0.80,-129.76)  215.01                80
 09/23/2021   10:02:37   (   0.37,-127.84) (  -0.21,-125.16)  305.51                80
 09/24/2021   22:21:32   (  -0.35,-127.75) (  -0.95,-130.37)  298.61                80
 09/25/2021   22:05:14   (  -0.36,-127.72) (   0.06,-125.77)  221.34                80
 09/27/2021   10:24:01   (   0.33,-127.71) (   1.09,-130.95)  369.68                80