Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 5 18.  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)
 05/18/2021   05:49:21   (   0.02,-128.19) (   0.69,-125.22)  338.26                80
 05/19/2021   18:08:13   (  -0.03,-128.26) (   0.34,-129.78)  174.16                80
 05/20/2021   17:50:14   (  -0.02,-128.28) (  -0.77,-124.79)  397.51                80
 05/22/2021   06:09:17   (   0.03,-128.28) (  -0.24,-129.39)  126.98                80
 05/23/2021   05:45:58   (   0.02,-128.29) (   0.87,-124.40)  443.69                80
 05/24/2021   18:04:52   (  -0.02,-128.35) (   0.10,-128.97)   70.21                80
 05/27/2021   06:05:55   (   0.03,-128.36) (   0.01,-128.58)   24.59                80
 05/29/2021   18:04:09   (  -0.04,-128.40) (  -0.09,-128.15)   29.03                80
 05/31/2021   06:23:12   (   0.05,-128.40) (  -0.91,-132.75)  495.14                80