Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 4 21.  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)
 04/21/2021   17:49:45   (   0.08,-127.84) (  -0.64,-124.69)  359.30                80
 04/23/2021   06:08:44   (  -0.07,-127.70) (  -0.44,-129.27)  179.81                80
 04/24/2021   05:45:24   (  -0.08,-127.66) (   0.70,-124.29)  385.25                80
 04/25/2021   18:04:14   (   0.07,-127.68) (   0.33,-128.84)  131.95                80
 04/26/2021   17:46:14   (   0.08,-127.65) (  -0.76,-123.84)  433.22                80
 04/28/2021   06:05:13   (  -0.07,-127.50) (  -0.28,-128.43)  106.50                80
 04/29/2021   05:41:53   (  -0.07,-127.45) (   0.81,-123.43)  457.63                80
 04/30/2021   18:00:43   (   0.06,-127.46) (   0.21,-127.99)   61.53                80
 05/03/2021   06:01:42   (  -0.06,-127.26) (  -0.16,-127.58)   37.57                80