Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 10 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  METOP-B Lat/Lon    Distance(km)  Time Diff(sec)
 10/11/2021   18:08:48   (  -0.35,-128.05) (   0.06,-129.79)  198.56                80
 10/12/2021   17:50:49   (  -0.34,-128.08) (  -1.09,-124.80)  373.65                80
 10/14/2021   06:07:10   (   0.34,-128.12) (   0.08,-129.40)  145.56                80
 10/15/2021   05:49:11   (   0.34,-128.15) (   1.17,-124.40)  426.37                80
 10/16/2021   18:05:23   (  -0.34,-128.18) (  -0.18,-128.97)   90.11                80
 10/17/2021   17:47:24   (  -0.34,-128.20) (  -1.27,-123.97)  481.92                80
 10/19/2021   06:03:45   (   0.35,-128.25) (   0.28,-128.58)   37.05                80
 10/21/2021   18:04:38   (  -0.35,-128.30) (  -0.37,-128.14)   17.71                80
 10/24/2021   06:03:00   (   0.34,-128.36) (   0.48,-127.75)   69.65                80