Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 4 24.  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)
 04/25/2021   18:04:22   (   0.07,-127.70) (   0.33,-128.87)  133.47                80
 04/26/2021   17:46:23   (   0.07,-127.66) (  -0.78,-123.87)  431.53                80
 04/28/2021   06:05:24   (  -0.06,-127.51) (  -0.29,-128.46)  109.19                80
 04/29/2021   05:42:06   (  -0.07,-127.46) (   0.82,-123.47)  454.81                80
 04/30/2021   18:00:59   (   0.06,-127.48) (   0.18,-128.04)   63.46                80
 05/03/2021   06:02:02   (  -0.05,-127.28) (  -0.14,-127.63)   40.62                80
 05/05/2021   18:00:17   (   0.05,-127.24) (   0.02,-127.21)    4.18                80
 05/08/2021   05:56:00   (  -0.05,-127.04) (   0.02,-126.80)   27.47                80