Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 10 13.  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)
 10/14/2021   06:07:10   (   0.34,-128.12) (   0.04,-129.39)  145.70                80
 10/15/2021   05:49:11   (   0.33,-128.14) (   1.19,-124.41)  426.20                80
 10/16/2021   18:05:23   (  -0.34,-128.18) (  -0.14,-128.96)   90.28                80
 10/17/2021   17:47:24   (  -0.34,-128.20) (  -1.29,-123.98)  481.75                80
 10/19/2021   06:06:25   (   0.35,-128.25) (   0.29,-128.58)   37.49                80
 10/21/2021   18:04:38   (  -0.35,-128.30) (  -0.39,-128.15)   17.42                80
 10/24/2021   06:03:00   (   0.34,-128.36) (   0.50,-127.76)   69.15                80
 10/25/2021   18:19:11   (  -0.34,-128.37) (   0.55,-132.31)  449.11                80
 10/26/2021   18:01:13   (  -0.33,-128.39) (  -0.60,-127.33)  121.80                80