Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 8 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)
 08/13/2021   05:49:52   (   0.06,-128.18) (   0.74,-125.22)  338.10                80
 08/14/2021   18:11:23   (  -0.03,-128.14) (   0.32,-129.77)  185.69                80
 08/15/2021   17:48:04   (  -0.05,-128.15) (  -0.78,-124.77)  384.75                80
 08/17/2021   06:09:44   (   0.02,-128.24) (  -0.25,-129.36)  128.33                80
 08/18/2021   05:46:26   (   0.04,-128.25) (   0.90,-124.38)  440.98                80
 08/19/2021   18:07:57   (  -0.01,-128.19) (   0.15,-128.93)   84.54                80
 08/20/2021   17:44:39   (  -0.03,-128.20) (  -1.01,-123.95)  485.13                80
 08/22/2021   06:06:19   (   0.00,-128.29) (  -0.03,-128.54)   28.24                80
 08/24/2021   18:01:51   (   0.00,-128.22) (  -0.02,-128.09)   15.01                80
 08/26/2021   06:23:31   (  -0.03,-128.32) (  -1.01,-132.68)  497.35                80