Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NOAA-19
TLE Epoch: 2021 4 16.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NOAA-19) NOAA-19 Lat/Lon    Distance(km)  Time Diff(sec)
 04/16/2021   19:09:56   (  80.33, -77.37) 04/16/2021   19:09:02  (  80.33, -77.20)    3.16                54
 04/16/2021   19:59:23   ( -80.33,  90.26) 04/16/2021   20:00:05  ( -80.32,  90.15)    2.20                42
 04/19/2021   01:33:06   (  80.31,-173.31) 04/19/2021   01:33:14  (  80.33,-173.24)    2.40                 8
 04/21/2021   07:06:49   ( -80.33, -76.60) 04/21/2021   07:06:28  ( -80.34, -76.55)    1.19                21
 04/21/2021   07:56:15   (  80.33,  91.03) 04/21/2021   07:57:25  (  80.32,  91.04)    1.21                70
 04/23/2021   12:40:31   (  80.34,  20.07) 04/23/2021   12:39:38  (  80.35,  20.01)    1.52                53
 04/23/2021   13:29:59   ( -80.31,-172.56) 04/23/2021   13:30:39  ( -80.33,-172.44)    3.15                40
 04/25/2021   19:03:40   (  80.35, -75.62) 04/25/2021   19:03:49  (  80.34, -75.72)    2.56                 9
 04/28/2021   00:37:24   ( -80.34,  20.79) 04/28/2021   00:37:02  ( -80.36,  20.75)    2.32                22