Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 12 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)
 12/17/2021   10:07:33   (  -0.02,-127.66) (  -0.43,-125.75)  216.90                80
 12/18/2021   22:27:25   (   0.04,-127.60) (  -0.77,-131.19)  409.11                80
 12/19/2021   22:11:42   (   0.03,-127.56) (   0.23,-126.74)   93.33                80
 12/22/2021   10:13:00   (  -0.04,-127.43) (   0.03,-127.68)   27.69                80
 12/23/2021   09:57:18   (  -0.03,-127.39) (  -0.97,-123.23)  474.09                80
 12/24/2021   22:17:08   (   0.05,-127.31) (  -0.27,-128.65)  153.07                80
 12/25/2021   22:01:25   (   0.04,-127.27) (   0.73,-124.21)  348.75                80
 12/27/2021   10:21:07   (  -0.05,-127.19) (   0.47,-129.60)  274.76                80
 12/28/2021   10:05:23   (  -0.05,-127.13) (  -0.47,-125.14)  226.56                80
 12/29/2021   22:25:13   (   0.06,-127.05) (  -0.76,-130.57)  401.88                80
 12/30/2021   22:09:31   (   0.05,-126.99) (   0.25,-126.12)   99.18                80