Simultaneous Nadir Overpasses (SNOs) between GOES-15 and LANDSAT-8
TLE Epoch: 2021 8 11.  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)
 08/12/2021   06:33:49   (   0.01,-128.17) (   0.56,-125.75)  275.69                80
 08/12/2021   18:57:43   (   0.02,-128.10) (   0.64,-130.89)  317.75                80
 08/14/2021   18:42:53   (   0.01,-128.13) (  -0.03,-127.94)   21.74                80
 08/16/2021   18:30:42   (   0.00,-128.15) (  -0.64,-124.98)  360.50                80
 08/17/2021   06:54:47   (  -0.04,-128.24) (  -0.43,-130.18)  219.41                80
 08/19/2021   06:39:56   (  -0.03,-128.26) (   0.19,-127.22)  118.30                80
 08/19/2021   19:03:51   (   0.06,-128.17) (   0.95,-132.36)  476.43                80
 08/21/2021   06:27:45   (  -0.02,-128.27) (   0.80,-124.26)  455.81                80
 08/21/2021   18:51:40   (   0.05,-128.19) (   0.33,-129.40)  138.87                80
 08/23/2021   18:36:50   (   0.04,-128.20) (  -0.34,-126.46)  198.75                80
 08/24/2021   07:00:53   (  -0.07,-128.30) (  -0.78,-131.64)  380.50                80