Simultaneous Nadir Overpasses (SNOs) between GOES-15 and LANDSAT-8
TLE Epoch: 2021 7 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 07/18/2021   06:39:43   (   0.09,-127.69) (   0.22,-127.21)   55.19                80
 07/20/2021   06:27:32   (   0.09,-127.61) (   0.79,-124.25)  381.80                80
 07/20/2021   18:48:46   (  -0.07,-127.55) (   0.35,-129.39)  210.58                80
 07/22/2021   18:39:16   (  -0.08,-127.46) (  -0.28,-126.44)  115.38                80
 07/23/2021   07:00:41   (   0.06,-127.48) (  -0.80,-131.64)  472.44                80
 07/24/2021   18:27:07   (  -0.09,-127.36) (  -0.91,-123.49)  440.96                80
 07/25/2021   06:48:30   (   0.07,-127.38) (  -0.23,-128.67)  147.01                80
 07/27/2021   06:33:40   (   0.08,-127.29) (   0.40,-125.72)  178.46                80
 07/27/2021   18:57:35   (  -0.06,-127.22) (   0.75,-130.86)  415.26                80
 07/29/2021   18:45:25   (  -0.06,-127.12) (   0.12,-127.91)   89.64                80
 07/31/2021   18:30:35   (  -0.07,-127.03) (  -0.51,-124.96)  235.67                80