Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 6 22.  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)
 06/23/2021   17:47:07   (  -0.11,-128.38) (  -1.09,-123.99)  499.90                80
 06/25/2021   06:06:08   (   0.11,-128.34) (   0.09,-128.59)   27.68                80
 06/27/2021   18:04:21   (  -0.12,-128.30) (  -0.15,-128.15)   16.92                80
 06/30/2021   06:00:02   (   0.13,-128.26) (   0.24,-127.75)   57.53                80
 07/01/2021   18:18:55   (  -0.13,-128.22) (   0.78,-132.31)  466.03                80
 07/02/2021   18:00:56   (  -0.13,-128.20) (  -0.36,-127.32)  101.28                80
 07/04/2021   06:19:57   (   0.12,-128.19) (  -0.69,-131.91)  424.11                80
 07/05/2021   05:56:37   (   0.13,-128.16) (   0.40,-126.91)  142.03                80
 07/06/2021   18:15:29   (  -0.12,-128.11) (   0.63,-131.47)  383.22                80