Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 10 9.  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)
 10/09/2021   06:10:35   (   0.35,-127.98) (  -0.13,-130.22)  255.18                80
 10/10/2021   05:52:36   (   0.34,-128.01) (   0.96,-125.23)  317.29                80
 10/11/2021   18:08:48   (  -0.35,-128.05) (   0.03,-129.79)  198.68                80
 10/12/2021   17:50:49   (  -0.34,-128.07) (  -1.06,-124.79)  373.49                80
 10/14/2021   06:07:10   (   0.35,-128.12) (   0.05,-129.40)  145.77                80
 10/15/2021   05:49:11   (   0.34,-128.14) (   1.15,-124.40)  426.14                80
 10/16/2021   18:05:23   (  -0.34,-128.18) (  -0.15,-128.97)   90.36                80
 10/17/2021   17:47:24   (  -0.34,-128.20) (  -1.31,-123.98)  481.65                80
 10/19/2021   06:03:45   (   0.35,-128.25) (   0.25,-128.57)   37.44                80
 10/21/2021   18:04:38   (  -0.35,-128.30) (  -0.35,-128.14)   17.63                80