Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 1 28.  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)
 01/28/2021   18:04:56   (   0.04,-127.69) (   0.33,-128.93)  142.14                80
 01/29/2021   17:46:55   (   0.07,-127.65) (  -0.74,-123.93)  423.74                80
 01/31/2021   06:03:17   (  -0.03,-127.56) (  -0.24,-128.53)  111.17                80
 02/01/2021   05:45:16   (  -0.06,-127.52) (   0.82,-123.53)  454.78                80
 02/02/2021   18:01:28   (   0.02,-127.50) (   0.17,-128.09)   67.93                80
 02/03/2021   17:43:28   (   0.05,-127.46) (  -0.95,-123.10)  497.42                80
 02/05/2021   05:59:48   (  -0.00,-127.35) (  -0.07,-127.69)   38.84                80
 02/07/2021   17:57:59   (  -0.02,-127.28) (   0.00,-127.25)    3.86                80
 02/10/2021   05:59:00   (   0.04,-127.11) (   0.11,-126.85)   29.69                80