Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 4 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)
 04/18/2021   06:12:15   (  -0.09,-127.88) (  -0.57,-130.13)  255.43                80
 04/19/2021   05:48:54   (  -0.09,-127.84) (   0.52,-125.12)  309.91                80
 04/20/2021   18:07:45   (   0.08,-127.87) (   0.47,-129.69)  206.77                80
 04/21/2021   17:49:45   (   0.08,-127.84) (  -0.62,-124.69)  358.76                80
 04/23/2021   06:08:44   (  -0.08,-127.70) (  -0.41,-129.28)  180.18                80
 04/24/2021   05:45:24   (  -0.08,-127.66) (   0.68,-124.28)  384.75                80
 04/25/2021   18:04:14   (   0.08,-127.68) (   0.36,-128.84)  132.99                80
 04/26/2021   17:46:15   (   0.08,-127.64) (  -0.79,-123.85)  432.09                80
 04/28/2021   06:05:13   (  -0.07,-127.49) (  -0.30,-128.43)  107.47                80
 04/29/2021   05:41:52   (  -0.08,-127.44) (   0.79,-123.43)  456.56                80
 04/30/2021   18:00:44   (   0.07,-127.44) (   0.18,-128.00)   63.07                80