Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 4 26.  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)
 04/26/2021   17:46:23   (   0.07,-127.66) (  -0.77,-123.87)  431.65                80
 04/28/2021   06:05:24   (  -0.06,-127.51) (  -0.30,-128.46)  109.24                80
 04/29/2021   05:42:06   (  -0.07,-127.46) (   0.81,-123.47)  454.83                80
 04/30/2021   18:00:59   (   0.06,-127.48) (   0.19,-128.03)   63.18                80
 05/03/2021   06:02:02   (  -0.05,-127.28) (  -0.15,-127.63)   40.49                80
 05/05/2021   18:00:17   (   0.05,-127.24) (   0.03,-127.21)    4.49                80
 05/08/2021   05:56:00   (  -0.04,-127.05) (   0.01,-126.80)   27.87                80
 05/09/2021   18:14:52   (   0.04,-127.04) (   1.03,-131.36)  492.32                80