Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 6 10.  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)
 06/10/2021   06:16:21   (   0.09,-128.48) (  -0.47,-131.09)  296.97                80
 06/11/2021   05:53:02   (   0.09,-128.47) (   0.61,-126.08)  271.29                80
 06/12/2021   18:11:54   (  -0.09,-128.47) (   0.40,-130.65)  247.99                80
 06/13/2021   17:53:56   (  -0.10,-128.47) (  -0.74,-125.66)  320.60                80
 06/15/2021   06:12:57   (   0.10,-128.45) (  -0.28,-130.26)  205.44                80
 06/16/2021   05:49:37   (   0.11,-128.44) (   0.80,-125.25)  362.18                80
 06/17/2021   18:08:30   (  -0.11,-128.43) (   0.22,-129.82)  158.61                80
 06/18/2021   17:50:31   (  -0.11,-128.42) (  -0.92,-124.83)  409.57                80
 06/20/2021   06:09:32   (   0.11,-128.40) (  -0.15,-129.41)  116.35                80
 06/21/2021   05:46:13   (   0.11,-128.38) (   1.00,-124.43)  450.73                80
 06/22/2021   18:05:05   (  -0.11,-128.35) (   0.02,-128.99)   71.96                80
 06/23/2021   17:47:06   (  -0.11,-128.34) (  -1.06,-123.99)  495.28                80