Simultaneous Nadir Overpasses (SNOs) between GOES-15 and LANDSAT-8
TLE Epoch: 2021 12 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)
 12/18/2021   06:34:01   (   0.13,-127.76) (   0.56,-125.75)  228.55                80
 12/18/2021   18:57:56   (  -0.11,-127.78) (   0.56,-130.90)  355.20                80
 12/20/2021   18:43:05   (  -0.11,-127.85) (  -0.12,-127.95)   12.08                80
 12/22/2021   18:30:53   (  -0.11,-127.91) (  -0.74,-124.99)  331.28                80
 12/23/2021   06:54:57   (   0.09,-127.92) (  -0.37,-130.19)  257.16                80
 12/25/2021   06:40:05   (   0.09,-127.98) (   0.26,-127.23)   85.46                80
 12/25/2021   19:04:00   (  -0.08,-127.99) (   0.86,-132.38)  498.94                80
 12/27/2021   06:27:53   (   0.09,-128.03) (   0.90,-124.27)  427.73                80
 12/27/2021   18:51:48   (  -0.08,-128.04) (   0.23,-129.42)  156.79                80
 12/29/2021   18:36:56   (  -0.08,-128.09) (  -0.41,-126.46)  184.66                80
 12/30/2021   07:01:00   (   0.07,-128.10) (  -0.68,-131.65)  403.96                80